Regional Effects and Lair Actions
ACQUISITIONS INCORPORATED
Ancient Deep Crow
Regional Effects
The region containing an ancient deep crow's lair is transformed by the creature's presence, which creates one or more of the following effects:- Supernatural shadow turns all bright light to dim light in underground regions within 6 miles of the lair.
- Intermittent, echoing caws can be heard coming from all directions within 6 miles of the lair.
- Subterranean beasts within 1 mile of the ancient deep crow's lair serve as the creature's eyes and ears, alerting it to the presence of intruders and making it all but impossible to surprise the ancient deep crow. If the ancient deep crow dies, these effects fade immediately.
EXPLORER'S GUIDE TO WILDEMOUNT
Sea Fury
Lair Actions
A sea fury lurks in the caverns where its coven once dwelled, decorating the walls with the bones of its slain kin, as well as baubles stolen from sunken wrecks. On initiative count 20 (losing initiative ties), the sea fury can take a lair action to cause one of the following magical effects, but can't use the same effect two rounds in a row:- Caverns, tunnels, and pools of water within 120 feet of the sea fury become foggy or murky, to the extent that the area becomes heavily obscured.
- The sea fury conjures a 15-foot cube of water that fills an unoccupied space it can see within 30 feet of it, then moves the water in a straight line up to 60 feet, after which the water disperses. Any creature that comes into contact with the rushing wave must succeed on a DC 16 Strength saving throw or be knocked prone by it and pushed 15 feet along its course.
- The sea fury calls forth the spirit of a dead sailor or sea hag that met its end in the lair. This spirit has the statistics of a specter and lasts until the sea fury uses another lair action. The specter appears in an unoccupied space within 30 feet of the sea fury and obeys the sea fury's commands.
Regional Effects
The region containing a sea fury's lair is warped by the sea fury's magic, which creates the following effects:- Sea water within 5 miles of the lair becomes coarse and choppy, as if whipped by an unseen wind.
- Sea grass within 1 mile of the lair is imbued with a foul mockery of life, grasping ineffectually at any creature that passes within 5 feet of it.
- Ordinary crabs and octopi within 1 mile of the lair grow in size to become giant crabs and giant octopi, respectively. These creatures serve the sea fury as spies and guards.
EBERRON: RISING FROM THE LAST WAR
Belashyrra
Lair Actions
While within the Citadel of Lidless Eyes, Belashyrra can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative ties), Belashyrra can take a lair action to cause one of the following effects; it can't use the same effect two rounds in a row:- An eye opens on a solid surface within 60 feet of Belashyrra. One random eye ray of Belashyrra's shoots from that eye at a target of Belashyrra's choice that it can see. The eye then closes and disappears.
- Belashyrra creates a wave of madness. Each creature it can see within its lair must succeed on a DC 22 Wisdom saving throw or be charmed for 1 minute. While charmed in this way, a creature must use its action at the start of its turn before moving to make a melee attack against another creature of Belashyrra's choice within reach. If there are no creatures within reach, the charmed creature can act normally for that turn. A charmed creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
- Belashyrra taps into the eyesight of creatures in its lair and alters their perception. Each creature of Belashyrra's choice in the lair must make a DC 22 Wisdom saving throw. On a failure, the affected creature perceives objects and creatures a short distance from their actual locations, imposing disadvantage on the creature's attack rolls against those targets. An affected creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to this lair action for the next 24 hours.
Regional Effects
Belashyrra's lair is known to touch remote areas of the Shadow Marches and caverns below Xen'drik. A region containing a passage to Belashyrra's lair is warped by its magic, which creates one or more of the following effects:- Creatures within 1 mile of the passage sometimes feel as if they're being watched.
- Beasts that live within 5 miles of the passage undergo magical transmutation, growing eyes or eyestalks that Belashyrra can see through.
- A humanoid who spends at least 1 hour within 1 mile of the passage must succeed on a DC 21 Wisdom saving throw or descend into a type of madness (see "Madness of Belashyrra" below). A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
- If Belashyrra dies, these effects fade over the course of 1d10 days.
Dyrrn
Lair Actions
While within the Palace of Sinew, Dyrrn can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative ties), Dyrrn can take a lair action to cause one of the following effects; it can't use the same effect two rounds in a row:- Dyrrn uses its Corruption action.
- A 30-foot-square area of ground within 120 feet of Dyrrn sprouts tentacles until initiative count 20 on the next round. Any creature that starts or ends its turn in the area must succeed on a DC 23 Strength saving throw or be restrained. A creature can escape the tentacles with a successful DC 23 Strength (Athletics) or Dexterity (Acrobatics) check as an action.
- Each creature of Dyrrn's choice that it can see within 120 feet of it must succeed on a DC 23 Wisdom saving throw or take 26 (4d12) psychic damage. Unless the target has immunity to psychic damage, its Intelligence score is reduced by 1d4 each time it fails the saving throw for this lair action. The target dies if its Intelligence score is reduced to 0. The reduction lasts until the target finishes a short or long rest.
Regional Effects
A region containing a passage to Dyrrn's lair is warped in one or more of these ways:- Plants and animals raised within 2 mile of the passage have twisted, aberrant forms. Use the Daelkyr Modifications table for inspiration.
- Creatures within 1 mile of the passage frequently feel as if something is crawling under their skin.
- If a humanoid spends at least 1 hour within 1 mile of the passage, that creature must succeed on a DC 22 Wisdom saving throw or descend into a type of madness (see "Madness of Dyrrn" below). A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
MONSTER MANUAL
Aboleth
Lair Actions
When fighting inside its lair, an aboleth can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative ties), the aboleth takes a lair action to cause one of the following effects:- The aboleth casts phantasmal force (no components required) on any number of creatures it can see within 60 feet of it. While maintaining concentration on this effect, the aboleth can't take other lair actions. If a target succeeds on the saving throw or if the effect ends for it, the target is immune to the aboleth's phantasmal force lair action for the next 24 hours, although such a creature can choose to be affected.
- Pools of water within 90 feet of the aboleth surge outward in a grasping tide. Any creature on the ground within 20 feet of such a pool must succeed on a DC 14 Strength saving throw or be pulled up to 20 feet into the water and knocked prone. The aboleth can't use this lair action again until it has used a different one.
- Water in the aboleth's lair magically becomes a conduit for the creature's rage. The aboleth can target any number of creatures it can see in such water within 90 feet of it. A target must succeed on a DC 14 Wisdom saving throw or take 7 (2d6) psychic damage. The aboleth can't use this lair action again until it has used a different one.
Regional Effects
The region containing an aboleth's lair is warped by the creature's presence, which creates one or more of the following effects:- Underground surfaces within 1 mile of the aboleth's lair are slimy and wet and are difficult terrain.
- Water sources within 1 mile of the lair are supernaturally fouled. Enemies of the aboleth that drink such water vomit it within minutes.
- As an action, the aboleth can create an illusory image of itself within 1 mile of the lair. The copy can appear at any location the aboleth has seen before or in any location a creature charmed by the aboleth can currently see. Once created, the image lasts for as long as the aboleth maintains concentration, as if concentrating on a spell. Although the image is intangible, it looks, sounds, and can move like the aboleth. The aboleth can sense, speak, and use telepathy from the image's position as if present at that position. If the image takes any damage, it disappears.
Ancient Black Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can't use the same effect two rounds in a row:- Pools of water that the dragon can see within 120 feet of it surge outward in a grasping tide. Any creature on the ground within 20 feet of such a pool must succeed on a DC 15 Strength saving throw or be pulled up to 20 feet into the water and knocked prone.
- A cloud of swarming insects fills a 20-foot-radius sphere centered on a point the dragon chooses within 120 feet of it. The cloud spreads around corners and remains until the dragon dismisses it as an action, uses this lair action again, or dies. The cloud is lightly obscured. Any creature in the cloud when it appears must make on a DC 15 Constitution saving throw, taking 10 (3d6) piercing damage on a failed save, or half as much damage on a successful one. A creature that ends its turn in the cloud takes 10 (3d6) piercing damage.
- Magical darkness spreads from a point the dragon chooses within 60 feet of it, filling a 15-foot-radius sphere until the dragon dismisses it as an action, uses this lair action again, or dies. The darkness spreads around corners. A creature with darkvision can't see through this darkness, and nonmagical light can't illuminate it. If any of the effect's area overlaps with an area of light created by a spell of 2nd level or lower, the spell that created the light is dispelled.
Regional Effects
The region containing a legendary black dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- The land within 6 miles of the lair takes twice as long as normal to traverse, since the plants grow thick and twisted, and the swamps are thick with reeking mud.
- Water sources within 1 mile of the lair are supernaturally fouled. Enemies of the dragon that drink such water regurgitate it within minutes.
- Fog lightly obscures the land within 6 miles of the lair.
Ancient Blue Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can't use the same effect two rounds in a row:- Part of the ceiling collapses above one creature that the dragon can see within 120 feet of it. The creature must succeed on a DC 15 Dexterity saving throw or take 10 (3d6) bludgeoning damage and be knocked prone and buried. The buried target is restrained and unable to breathe or stand up. A creature can take an action to make a DC 10 Strength check, ending the buried state on a success.
- A cloud of sand swirls about in a 20-foot-radius sphere centered on a point the dragon can see within 120 feet of it. The cloud spreads around corners. Each creature in the cloud must succeed on a DC 15 Constitution saving throw or be blinded for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
- Lightning arcs, forming a 5-foot-wide line between two of the lair's solid surfaces that the dragon can see. They must be within 120 feet of the dragon and 120 feet of each other. Each creature in that line must succeed on a DC 15 Dexterity saving throw or take 10 (3d6) lightning damage.
Regional Effects
The region containing a legendary blue dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- Thunderstorms rage within 6 miles of the lair.
- Dust devils scour the land within 6 miles of the lair. A dust devil has the statistics of an air elemental, but it can't fly, has a speed of 50 feet, and has an Intelligence and Charisma of 1 (-5).
- Hidden sinkholes form in and around the dragon's lair. A sinkhole can be spotted from a safe distance with a successful DC 20 Wisdom (Perception) check. Otherwise, the first creature to step on the thin crust covering the sinkhole must succeed on a DC 15 Dexterity saving throw or fall 1d6 × 10 feet into the sinkhole.
Ancient Brass Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects:- A strong wind blows around the dragon. Each creature within 60 feet of the dragon must succeed on a DC 15 Strength saving throw or be pushed 15 feet away from the dragon and knocked prone. Gases and vapors are dispersed by the wind, and unprotected flames are extinguished. Protected flames; such as lanterns, have a 50 percent chance of being extinguished.
- A cloud of sand swirls about in a 20-foot-radius sphere centered on a point the dragon can see within 120 feet of it. The cloud spreads around corners. Each creature in it must succeed on a DC 15 Constitution saving throw or be blinded for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
Regional Effects
The region containing a legendary brass dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- Tracks appear in the sand within 6 miles of the dragon's lair. The tracks lead to safe shelters and hidden water sources, while also leading away from areas that the dragon prefers to remain undisturbed.
- Images of Large or smaller monsters haunt the desert sands within 1 mile of the dragon's lair. These illusions move and appear real, although they can do no harm. A creature that examines an image from a distance can tell it's an illusion with a successful DC 20 Intelligence (Investigation) check. Any physical interaction with an image reveals it to be an illusion, because objects pass through it.
- Whenever a creature with an Intelligence of 3 or higher comes within 30 feet of a water source within 1 mile of the dragon's lair, the dragon becomes aware of the creature's presence and location.
Ancient Bronze Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects:- The dragon creates fog as though it had cast the fog cloud spell. The fog lasts until initiative count 20 on the next round.
- A thunderclap originates at a point the dragon can see within 120 feet of it. Each creature within a 20-foot radius centered on that point must make a DC 15 Constitution saving throw or take 5 (1d10) thunder damage and be deafened until the end of its next turn.
Regional Effects
The region containing a legendary bronze dragon's lair is warped by the dragon's magic.- Once per day, the dragon can alter the weather in a 6-mile radius centered on its lair. The dragon doesn't need to be outdoors; otherwise the effect is identical to the control weather spell.
- Underwater plants within 6 miles of the dragon's lair take on dazzlingly brilliant hues.
- Within its lair, the dragon can set illusory sounds, such as soft music and strange echoes, so that they can be heard in various parts of the lair.
Ancient Copper Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects:- The dragon chooses a point on the ground that it can see within 120 feet of it. Stone spikes sprout from the ground in a 20-foot radius centered on that point. The effect is otherwise identical to the spike growth spell and lasts until the dragon uses this lair action again or until the dragon dies.
- The dragon chooses a 10-foot-square area on the ground that it can see within 120 feet of it. The ground in that area turns into 3-foot-deep mud. Each creature on the ground in that area when the mud appears must succeed on a DC 15 Dexterity saving throw or sink into the mud and become restrained. A creature can take an action to attempt a DC 15 Strength check, freeing itself or another creature within its reach and ending the restrained condition on a success. Moving 1 foot in the mud costs 2 feet of movement. On initiative count 20 on the next round, the mud hardens, and the Strength DC to work free increases to 20. If the dragon dies, the magic carvings fade over the course of 1d10 days. The other effects end immediately.
Regional Effects
The region containing a legendary copper dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- Magic carvings of the dragon's smiling visage can be seen worked into stone terrain and objects within 6 miles of the dragon's lair.
- Tiny beasts such as rodents and birds that are normally unable to speak gain the magical ability to speak and understand Draconic while within 1 mile of the dragon's lair. These creatures speak well of the dragon, but can't divulge its whereabouts.
- Intelligent creatures within 1 mile of the dragon's lair are prone to fits of giggling. Even serious matters suddenly seem amusing.
Ancient Gold Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can't use the same effect two rounds in a row:- The dragon glimpses the future, so it has advantage on attack rolls, ability checks, and saving throws until initiative count 20 on the next round.
- One creature the dragon can see within 120 feet of it must succeed on a DC 15 Charisma saving throw or be banished to a dream plane, a different plane of existence the dragon has imagined into being. To escape, the creature must use its action to make a Charisma check contested by the dragon's. If the creature wins, it escapes the dream plane. Otherwise, the effect ends on initiative count 20 on the next round. When the effect ends, the creature reappears in the space it left or in the nearest unoccupied space if that one is occupied.
Regional Effects
The region containing a legendary gold dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- Whenever a creature that can understand a language sleeps or enters a state of trance or reverie within 6 miles of the dragon's lair, the dragon can establish telepathic contact with that creature and converse with it in its dreams. The creature remembers its conversation with the dragon upon waking.
- Banks of beautiful, opalescent mist manifest within 6 miles of the dragon's lair. The mist doesn't obscure anything. It assumes haunting forms when evil creatures are near the dragon or other non-evil creatures in the mist, warning such creatures of the danger.
- Gems and pearls within 1 mile of the dragon's lair sparkle and gleam, shedding dim light in a 5-foot radius.
Ancient Green Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can't use the same effect two rounds in a row:- Grasping roots and vines erupt in a 20-foot radius centered on a point on the ground that the dragon can see within 120 feet of it. That area becomes difficult terrain, and each creature there must succeed on a DC 15 Strength saving throw or be restrained by the roots and vines. A creature can be freed if it or another creature takes an action to make a DC 15 Strength check and succeeds. The roots and vines wilt away when the dragon uses this lair action again or when the dragon dies.
- A wall of tangled brush bristling with thorns springs into existence on a solid surface within 120 feet of the dragon. The wall is up to 60 feet long, 10 feet high, and 5 feet thick, and it blocks line of sight. When the wall appears, each creature in its area must make a DC 15 Dexterity saving throw. A creature that fails the save takes 18 (4d8) piercing damage and is pushed 5 feet out of the wall's space, appearing on whichever side of the wall it wants. A creature can move through the wall, albeit slowly and painfully. For every 1 foot a creature travels through the wall, it must spend 4 feet of movement. Furthermore, a creature in the wall's space must make a DC 15 Dexterity saving throw once each round it's in contact with the wall, taking 18 (4d8) piercing damage on a failed save, or half as much damage on a successful one. Each 10-foot section of wall has AC 5, 15 hit points, vulnerability to fire damage, resistance to bludgeoning and piercing damage, and immunity to psychic damage. The wall sinks back into the ground when the dragon uses this lair action again or when the dragon dies.
- Magical fog billows around one creature the dragon can see within 120 feet of it. The creature must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round.
Regional Effects
The region containing a legendary green dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- Thickets form labyrinthine passages within 1 mile of the dragon's lair. The thickets act as 10-foot-high, 10-foot-thick walls that block line of sight. Creatures can move through the thickets, with every 1 foot a creature moves costing it 4 feet of movement. A creature in the thickets must make a DC 15 Dexterity saving throw once each round it's in contact with the 'thickets or take 3 (1d6) piercing damage from thorns.
- Each 10-foot-cube of thickets has AC 5, 30 hit points, resistance to bludgeoning and piercing damage, vulnerability to fire damage, and immunity to psychic and thunder damage.
- Within 1 mile of its lair, the dragon leaves no physical evidence of its passage unless it wishes to. Tracking it there is impossible except by magical means. In addition, it ignores movement impediments and damage from plants in this area that are neither magical nor creatures, including the thickets described above. The plants remove themselves from the dragon's path.
- Rodents and birds within 1 mile of the dragon's lair serve as the dragon's eyes and ears. Deer and other large game are strangely absent, hinting at the presence of an unnaturally hungry predator.
Ancient Red Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can't use the same effect two rounds in a row:- Magma erupts from a point on the ground the dragon can see within 120 feet of it, creating a 20-foot-high, 5-foot-radius geyser. Each creature in the geyser's area must make a DC 15 Dexterity saving throw, taking 21 (6d6) fire damage on a failed save, or half as much damage on a successful one.
- A tremor shakes the lair in a 60-foot radius around the dragon. Each creature other than the dragon on the ground in that area must succeed on a DC 15 Dexterity saving throw or be knocked prone.
- Volcanic gases form a cloud in a 20-foot-radius sphere centered on a point the dragon can see within 120 feet of it. The sphere spreads a round corners, and its area is lightly obscured. It lasts until initiative count 20 on the next round. Each creature that starts its turn in the cloud must succeed on a DC 13 Constitution saving throw or be poisoned until the end of its turn. While poisoned in this way, a creature is incapacitated.
Regional Effects
The region containing a legendary red dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- Small earthquakes are common within 6 miles of the dragon's lair.
- Water sources within 1 mile of the lair are supernaturally warm and tainted by sulfur.
- Rocky fissures within 1 mile of the dragon's lair form portals to the Elemental Plane of Fire, allowing creatures of elemental fire into the world to dwell nearby.
Ancient Silver Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects:- The dragon creates fog as if it had cast the fog cloud spell. The fog lasts until initiative count 20 on the next round.
- A blisteringly cold wind blows through the lair near the dragon. Each creature within 120 feet of the dragon must succeed on a DC 15 Constitution saving throw or take 5 (1d10) cold damage. Gases and vapors are dispersed by the wind, and unprotected flames are extinguished. Protected flames, such as lanterns, have a 50 percent chance of being extinguished.
Regional Effects
The region containing a legendary silver dragon's lair is warped by the dragon's magic, which creates one or more of the following effects.- Once per day, the dragon can alter the weather in a 6-mile radius centered on its lair. The dragon doesn't need to be outdoors; otherwise the effect is identical to the control weather spell.
- Within 1 mile of the lair, winds buoy non-evil creatures that fall due to no act of the dragon's or its allies. Such creatures descend at a rate of 60 feet per round and take no falling damage.
- Given days or longer to work, the dragon can make clouds and fog within its lair as solid as stone, forming structures and other objects as it wishes.
Ancient White Dragon
Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can't use the same effect two rounds in a row:- Freezing fog fills a 20-foot-radius sphere centered on a point the dragon can see within 120 feet of it. The fog spreads around corners, and its area is heavily obscured. Each creature in the fog when it appears must make a DC 10 Constitution saving throw, taking 10 (3d6) cold damage on a failed save, or half as much damage on a successful one. A creature that ends its turn in the fog takes 10 (3d6) cold damage. A wind of at least 20 miles per hour disperses the fog. The fog otherwise lasts until the dragon uses this lair action again or until the dragon dies.
- Jagged ice shards fall from the ceiling, striking up to three creatures underneath that the dragon can see within 120 feet of it. The dragon makes one ranged attack roll (+7 to hit) against each target. On a hit, the target takes 10 (3d6) piercing damage.
- The dragon creates an opaque wall of ice on a solid surface it can see within 120 feet of it. The wall can be up to 30 feet long, 30 feet high, and 1 foot thick. When the wall appears, each creature within its area is pushed 5 feet out of the wall's space; appearing on whichever side of the wall it wants. Each 10-foot section of the wall has AC 5, 30 hit points, vulnerability to fire damage, and immunity to acid, cold, necrotic, poison, and psychic damage. The wall disappears when the dragon uses this lair action again or when the dragon dies.
Regional Effects
The region containing a legendary white dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:- Chilly fog lightly obscures the land within 6 miles of the dragon's lair.
- Freezing precipitation falls within 6 miles of the dragon's lair, sometimes forming blizzard conditions when the dragon is at rest.
- Icy walls block off areas in the dragon's lair. Each wall is 6 inches thick, and a 10-foot section has AC 5, 15 hit points, vulnerability to fire damage, and immunity to acid, cold, necrotic, poison, and psychic damage.
- If the dragon wishes to move through a wall, it can do so without slowing down. The portion of the wall the dragon moves through is destroyed, however.
Androsphinx
Lair Actions
On initiative count 20 (losing initiative ties), the sphinx can take a lair action to cause one of the following magical effects; the sphinx can't use an effect again until it finishes a short or long rest:- The flow of time is altered such that every creature in the lair must reroll initiative. The sphinx can choose not to reroll.
- The effects of time are altered such that every creature in the lair must succeed on a DC 15 Constitution saving throw or become 1d20 years older or younger (the sphinx's choice), but never any younger than 1 year old. A greater restoration spell can restore a creature's age to normal.
- The flow of time within the lair is altered such that everything within moves up to 10 years forward or backward (sphinx's choice). Only the sphinx is immediately aware of the time change. A wish spell can return the caster and up to seven other creatures designated by the caster to their normal time.
- The sphinx shifts itself and up to seven other creatures it can see within in its lair to another plane of existence. Once outside its lair, the sphinx can't use lair actions, but it can return to its lair as a bonus action on its turn, taking up to seven creatures with it.
Beholder
Lair Actions
When fighting inside its lair, a beholder can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative ties), the beholder can take one lair action to cause one of the following effects:- A 50-foot-square area of ground within 120 feet of the beholder becomes slimy; that area is difficult terrain until initiative count 20 on the next round.
- Walls within 120 feet of the beholder sprout grasping appendages until initiative count 20 on the round after next. Each creature of the beholder's choice that starts its turn within 10 feet of such a wall must succeed on a DC 15 Dexterity saving throw or be grappled. Escaping requires a successful DC 15 Strength (Athletics) or Dexterity (Acrobatics) check.
- An eye opens on a solid surface within 60 feet of the beholder. One random eye ray of the beholder shoots from that eye at a target of the beholder's choice that it can see. The eye then closes and disappears.
- The beholder can't repeat an effect until they have all been used, and it can't use the same effect two rounds in a row.
Regional Effects
A region containing a beholder's lair is warped by the creature's unnatural presence, which creates one or more of the following effects:- Creatures within 1 mile of the beholder's lair sometimes feel as if they're being watched when they aren't.
- When the beholder sleeps, minor warps in reality occur within 1 mile of its lair and then vanish 24 hours later. Marks on cave walls might change subtly, an eerie trinket might appear where none existed before, harmless slime might coat a statue, and so on. These effects apply only to natural surfaces and to nonmagical objects that aren't on anyone's person.
Death Tyrant
Lair Actions
When fighting inside its lair, a death tyrant can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative ties), the death tyrant can take one lair action to cause one of the following effects:- An area that is a 50-foot cube within 120 feet of the tyrant is filled with spectral eyes and tentacles. To creatures other than the death tyrant, that area is lightly obscured and difficult terrain until initiative count 20 on the next round.
- Walls sprout spectral appendages until initiative count 20 on the round after next. Any creature, including one on the Ethereal Plane, that is hostile to the tyrant and starts its turn within 10 feet of a wall must succeed on a DC 17 Dexterity saving throw or be grappled. Escaping requires a successful DC 17 Strength (Athletics) or Dexterity (Acrobatics) check.
- A spectral eye opens in the air at a point within 50 feet of the tyrant. One random eye ray of the tyrant shoots from that eye, which is considered to be an ethereal source, at a target of the tyrant's choice. The eye then closes and disappears.
- The death tyrant can't repeat an effect until all three have been used, and it can't use the same effect on consecutive rounds.
Regional Effects
A region containing a death tyrant's lair is warped by the creature's unnatural presence, which creates one or more of the following effects:- Creatures within 1 mile of the tyrant's lair sometimes feel as if they're being watched even when they aren't.
- When a creature hostile to the tyrant and aware of its existence finishes a long rest within 1 mile of the tyrant's lair, roll a d20 for that creature. On a roll of 10 or lower, the creature is subjected to one random eye ray of the tyrant.
Demilich
Lair Actions
On initiative count 20 (losing initiative ties), the demilich rolls a d20. On a result of 11 or higher, the demilich takes a lair action to cause one of the following effects. It can't use the same effect two rounds in a row.- The tomb trembles violently for a moment. Each creature on the floor of the tomb must succeed on a DC 19 Dexterity saving throw or be knocked prone.
- The demilich targets one creature it can see within 60 feet of it. An antimagic field fills the space of the target, moving with it until initiative count 20 on the next round.
- The demilich targets any number of creatures it can see within 30 feet of it. No target can regain hit points until initiative count 20 on the next round.
Regional Effects
A demilich's tomb might have any or all of the following effects in place:- The first time a non-evil creature enters the tomb's area, the creature takes 16 (3d10) necrotic damage.
- Monsters in the tomb have advantage on saving throws against being charmed or frightened, and against features that turn undead.
- The tomb is warded against the magical travel of creatures the demilich hasn't authorized. Such creatures can't teleport into or out of the tomb's area or use planar travel to enter or leave it. Effects that allow teleportation or planar travel work within the tomb as long as they aren't used to leave or enter the tomb's area.
Gynosphinx
Lair Actions
On initiative count 20 (losing initiative ties), the sphinx can take a lair action to cause one of the following magical effects; the sphinx can't use an effect again until it finishes a short or long rest:- The flow of time is altered such that every creature in the lair must reroll initiative. The sphinx can choose not to reroll.
- The effects of time are altered such that every creature in the lair must succeed on a DC 15 Constitution saving throw or become 1d20 years older or younger (the sphinx's choice), but never any younger than 1 year old. A greater restoration spell can restore a creature's age to normal.
- The flow of time within the lair is altered such that everything within moves up to 10 years forward or backward (sphinx's choice). Only the sphinx is immediately aware of the time change. A wish spell can return the caster and up to seven other creatures designated by the caster to their normal time.
- The sphinx shifts itself and up to seven other creatures it can see within in its lair to another plane of existence. Once outside its lair, the sphinx can't use lair actions, but it can return to its lair as a bonus action on its turn, taking up to seven creatures with it.
Kraken
Lair Actions
On initiative count 20 (losing initiative ties), the kraken takes a lair action to cause one of the following magical effects:- A strong current moves through the kraken's lair. Each creature within 60 feet of the kraken must succeed on a DC 23 Strength saving throw or be pushed up to 60 feet away from the kraken. On a success, the creature is pushed 10 feet away from the kraken.
- Creatures in the water within 60 feet of the kraken have vulnerability to lightning damage until initiative count 20 on the next round.
- The water in the kraken's lair becomes electrically charged. All creatures within 120 feet of the kraken must succeed on a DC 23 Constitution saving throw, taking 10 (3d6) lightning damage on a failed save, or half as much damage on a successful one.
Regional Effects
The region containing a kraken's lair is warped by the creature's blasphemous presence, creating the following magical effects:- The kraken can alter the weather at will in a 6-mile radius centered on its lair. The effect is identical to the control weather spell.
- Water elementals coalesce within 6 miles of the lair. These elementals can't leave the water and have Intelligence and Charisma scores of 1 (-5).
- Aquatic creatures within 6 miles of the lair that have an Intelligence score of 2 or lower are charmed by the kraken and aggressive toward intruders in the area.
- When the kraken dies, all of these regional effects fade immediately.
Lich
Lair Actions
On initiative count 20 (losing initiative ties), the lich can take a lair action to cause one of the following magical effects; the lich can't use the same effect two rounds in a row:- The lich rolls a d8 and regains a spell slot of that level or lower. If it has no spent spell slots of that level or lower, nothing happens.
- The lich targets one creature it can see within 30 feet of it. A crackling cord of negative energy tethers the lich to the target. Whenever the lich takes damage, the target must make a DC 18 Constitution saving throw. On a failed save, the lich takes half the damage (rounded down), and the target takes the remaining damage. This tether lasts until initiative count 20 on the next round or until the lich or the target is no longer in the lich's lair.
- The lich calls forth the spirits of creatures that died in its lair. These apparitions materialize and attack one creature that the lich can see within 60 feet of it. The target must succeed on a DC 18 Constitution saving throw, taking 52 (15d6) necrotic damage on a failed save, or half as much damage on a success. The apparitions then disappear.
Mummy Lord
Lair Actions
On initiative count 20 (losing initiative ties), the mummy lord takes a lair action to cause one of the following effects; the mummy lord can't use the same effect two rounds in a row: Each undead creature in the lair can pinpoint the location of each living creature within 120 feet of it until initiative count 20 on the next round. Each undead in the lair has advantage on saving throws against effects that turn undead until initiative count 20 on the next round. Until initiative count 20 on the next round, any non-undead creature that tries to cast a spell of 4th level or lower in the mummy lord's lair is wracked with pain. The creature can choose another action, but if it tries to cast the spell, it must make a DC 16 Constitution saving throw. On a failed save, it takes 1d6 necrotic damage per level of the spell, and the spell has no effect and is wasted.Regional Effects
A mummy lord's temple or tomb is warped in any of the following ways by the creature's dark presence:- Food instantly molders and water instantly evaporates when brought into the lair. Other non magical drinks are spoiled - wine turning to vinegar, for instance.
- Divination spells cast within the lair by creatures other than the mummy lord have a 25 percent chance to provide misleading results, as determined by the DM. If a divination spell already has a chance to fail or become unreliable when cast multiple times, that chance increases by 25 percent.
- A creature that takes treasure from the lair is cursed until the treasure is returned. The cursed target has disadvantage on all saving throws. The curse lasts until removed by a remove curse spell or other magic.
Unicorn
Regional Effects
Transformed by the creature's celestial presence, the domain of a unicorn might include any of the following magical effects:- Open flames of a non magical nature are extinguished within the unicorn's domain. Torches and campfires refuse to burn, but closed lanterns are unaffected.
- Creatures native to the unicorn's domain have an easier time hiding; they have advantage on all Dexterity (Stealth) checks made to hide.
- When a good-aligned creature casts a spell or uses a magical effect that causes another good-aligned creature to regain hit points, the target regains the maximum number of hit points possible for the spell or effect.
- Curses affecting any good-aligned creature are suppressed.
Vampire
Regional Effects
The region surrounding a vampire's lair is warped by the creature's unnatural presence, creating any of the following effects:- There's a noticeable increase in the populations of bats, rats, and wolves in the region.
- Plants within 500 feet of the lair wither, and their stems and branches become twisted and thorny.
- Shadows cast within 500 feet of the lair seem abnormally gaunt and sometimes move as though alive.
- A creeping fog clings to the ground within 500 feet of the vampire's lair. The fog occasionally takes eerie forms, such as grasping claws and writhing serpents.
MYTHIC ODYSSEYS OF THEROS
Arasta
Lair Actions
On initiative count 20 (losing initiative ties), Arasta can take a lair action to cause one of the following effects. She can't use the same effect two rounds in a row.- Arasta learns about any creature touching her webs. Each creature restrained by a web or Arasta's Web of Hair must make a DC 21 Intelligence saving throw. On a failed save, Arasta gains knowledge of a creature's name, race, where they consider home, and what brought them to her web.
- Arasta casts the giant insect spell (spiders only). It lasts until she uses this lair action again or until she dies.
Regional Effects
The region containing Arasta's lair is warped by her presence, which creates one or more of the following effects:- Spiders and insects within 1 mile of Arasta's lair serve as her eyes and ears. Birds and other flying creatures are absent from the skies and occasionally found trapped in webs.
- Within 1 mile of Arasta's lair, webs fill all 10-foot cubes of open space, so long as the webs can be anchored between two solid masses (such as walls or trees). The webs are flammable. Any webs exposed to fire burn away in 1 round. Any destroyed webs are magically repaired at the next dawn.
Hythonia
Lair Actions
On initiative count 20 (losing initiative ties), Hythonia can take a lair action to cause one of the following effects. She can't use the same effect two rounds in a row:- Hythonia briefly animates creatures that have been petrified by her gaze. Each statue attacks one creature within 5 feet of it, with a +11 bonus to hit and dealing 10 (3d6) bludgeoning damage on a hit. If a Medium or smaller creature takes this damage, it is also grappled (escape DC 15).
- Hythonia causes spectral snakes to erupt from a point she can see within 150 feet of her. Each creature within 20 feet of that point must succeed on a DC 19 Constitution saving throw or take 5 (2d4) piercing damage and become poisoned until the end of its next turn. While poisoned in this way, the creature has disadvantage on Intelligence checks and Intelligence saving throws, and it behaves as if under the effect of the confusion spell.
Regional Effects
The region containing Hythonia's lair is warped by her presence, which creates one or more of the following effects:- A large population of snakes dwells in the region.
- Trees within 1 mile of the lair are petrified wood. Plants that stay within 500 feet of the lair for 1 day turn to stone.
- Small bodies of water within 1 mile of the lair become poisonous. A creature that drinks the water must succeed on a DC 19 Constitution saving throw or become poisoned for 8 hours. An affected creature can repeat the saving throw at the end of each hour.
MORDENKAINEN'S TOME OF FOES
Balhannoth
Lair Actions
When fighting inside its lair, a balhannoth can use lair actions. On initiative count 20 (losing initiative ties), a balhannoth can take one lair action to cause one of the following effects; the balhannoth can't use the same lair action two rounds in a row:- The balhannoth warps reality around it in an area up to 500 feet square. After 10 minutes, the terrain in the area reshapes to assume the appearance of a location sought by one intelligent creature whose mind the balhannoth has read (see Regional Effects below). The transformation affects nonliving material only and can't create anything with moving parts or magical properties. Any object created in this area is, upon close inspection, revealed as a fake. Books are filled with empty pages, golden items are obvious counterfeits, and so on. The transformation lasts until the balhannoth dies or uses this lair action again.
- The balhannoth targets one creature within 500 feet of it. The target must succeed on a DC 16 Wisdom saving throw or the target, along with whatever it is wearing and carrying, teleports to an unoccupied space of the balhannoth's choice within 60 feet of it.
- The balhannoth targets one creature within 500 feet of it. The target must succeed on a DC 16 Wisdom saving throw or the balhannoth becomes invisible to that creature for 1 minute. This effect ends if the balhannoth attacks the target.
Regional Effects
A region containing a balhannoth's lair becomes warped by the creature's unnatural presence, which creates one or more of the following effects:- Creatures within 1 mile of the balhannoth's lair experience a sensation of being close to whatever they desire most. The sensation grows stronger the closer the creatures come to the balhannoth's lair.
- The balhannoth can sense the strongest desires of any humanoid within 1 mile of it and learns whether those desires involve a place: a safe location to rest, a temple, home, or somewhere else.
Baphomet
Lair Actions
On initiative count 20 (losing initiative ties), Baphomet can take a lair action to cause one of the following magical effects; he can't use the same effect two rounds in a row:- Baphomet seals one doorway or other entryway within the lair. The opening must be unoccupied. It is filled with solid stone for 1 minute or until Baphomet creates this effect again.
- Baphomet chooses a room within the lair that is no larger in any dimension than 100 feet. Until the next initiative count 20, gravity is reversed within that room. Any creatures or objects in the room when this happens fall in the direction of the new pull of gravity, unless they have some means of remaining aloft. Baphomet can ignore the gravity reversal if he's in the room, although he likes to use this action to land on a ceiling to attack targets flying near it.
- Baphomet casts mirage arcane, affecting a room within the lair that is no larger in any dimension than 100 feet. The effect ends on the next initiative count 20.
Regional Effects
The region containing Baphomet's lair is warped by his magic, creating one or more of the following effects:- Plant life within 1 mile of the lair grows thick and forms walls of trees, hedges, and other flora in the form of small mazes.
- Beasts within 1 mile of the lair become frightened and disoriented, as though constantly under threat of being hunted, and might lash out or panic even when no visible threat is nearby.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 18 Wisdom saving throw or descend into a madness determined by the Madness of Baphomet table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Baphomet
d100 Flaw (lasts until cured)- 01-20 "My anger consumes me. I can't be reasoned with when my rage has been stoked."
- 21-40 "I degenerate into beastly behavior, seeming more like a wild animal than a thinking being."
- 41-60 "The world is my hunting ground. Others are my prey."
- 61-80 "Hate comes easily to me and explodes into rage."
- 81-00 "I see those who oppose me not as people, but as beasts meant to be preyed upon."
Demogorgon
Lair Actions
On Initiative count 20 (losing initiative ties), Demogorgon can take a lair action to cause one of the following effects: Demogorgon can't use the same effect two rounds in a row:- Demogorgon creates an illusory duplicate of himself, which appears in his own space and lasts until initiative count 20 of the next round. On his turn, Demogorgon can move the illusory duplicate a distance equal to his walking speed (no action required). The first time a creature or object interacts physically with Demogorgon (for example, hitting him with an attack), there is a 50 percent chance that it is the illusory duplicate that is being affected, not Demogorgon himself, in which case the illusion disappears.
- Demogorgon casts the darkness spell four times at its lowest level, targeting different areas with the spell. Demogorgon doesn't need to concentrate on the spells, which end on initiative count 20 of the next round.
Regional Effects
The region containing Demogorgon's lair is warped by his magic, creating one or more of the following effects:- The area within 6 miles of the lair becomes overpopulated with lizards, poisonous snakes, and other venomous beasts.
- Beasts within 1 mile of the lair become violent and crazed-even creatures that are normally docile.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 23 Wisdom saving throw or descend into a madness determined by the Madness of Demogorgon table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Demogorgon
d100 Flaw (lasts until cured)- 01-20 "Someone is plotting to kill me. I need to strike first to stop them!"
- 21-40 "There is only one solution to my problems: kill them all!"
- 41-60 "There is more than one mind inside my head."
- 61-80 "If you don't agree with me, I'll beat you into submission to get my way."
- 81-00 "I can't allow anyone to touch anything that belongs to me. They might try to take it away from me!"
Fraz-Urb'luu
Lair Actions
On Initiative count 20 (losing initiative ties), Fraz-Urb'luu can take a lair action to cause one of the following effects: he can't use the same effect two rounds in a row:- Fraz-Urb'luu causes up to 5 doors within the lair to become walls, and an equal number of doors to appear on walls where there previously were none.
- Fraz-Urb'luu chooses one humanoid within the lair and instantly creates a simulacrum of that creature (as if created with the simulacrum spell). This simulacrum obeys Fraz-Urb'luu's commands and is destroyed on the next initiative count 20.
- Fraz-Urb'luu creates a wave of anguish. Each creature he can see within the lair must succeed on a DC 23 Wisdom saving throw or take 33 (6d10) psychic damage.
Regional Effects
The region containing Fraz-Urb'luu's lair is warped by his magic, creating one or more of the following effects:- Intelligent creatures within 1 mile of the lair frequently see hallucinations of long-dead friends and comrades that vanish after only a brief glimpse.
- Roads and paths within 6 miles of the lair twist and turn back on themselves, making navigation in the area exceedingly difficult.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 23 Wisdom saving throw or descend into a madness determined by the Madness of Fraz-Urb'luu table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Fraz-Urb'luu
d100 Flaw (lasts until cured)- 01-20 "I never let anyone know the truth about my actions or intentions, even if doing so would be beneficial to me."
- 21-40 "I have intermittent hallucinations and fits of catatonia."
- 41-60 "My mind wanders as I have elaborate fantasies that have no bearing on reality. When I return my focus to the world, I have a hard time remembering that it was just a daydream."
- 61-80 "I convince myself that things are true, even in the face of overwhelming evidence to the contrary."
- 81-00 "My perception of reality doesn't match anyone else's. It makes me prone to violent delusions that make no sense to anyone else."
Geryon
Lair Actions
On initiative count 20 (losing initiative ties), Geryon can take a lair action to cause one of the following effects; he can't use the same effect two rounds in a row:- Geryon causes a blast of cold to burst from the ground at a point he can see within 120 feet of him. The cold fills a cube, 10 feet on each side, centered on that point. Each creature in that area must succeed on a DC 21 Constitution saving throw or take 28 (8d6) cold damage.
- Geryon targets one creature he can see within 60 feet of him. The target must succeed on a DC 21 Wisdom saving throw or become restrained for 1 minute. The target can end the effect on itself if it deals any damage to one or more of its allies.
- Geryon casts the banishment spell.
Regional Effects
The region containing Geryon's lair is warped by his magic, creating one or more of the following effects:- Intelligent creatures within 1 mile of the lair frequently see shimmering portals leading to places they consider safe. Passing through a portal always deposits a traveler somewhere in Stygia.
- Freezing strong winds howl around the area within 1 mile of the lair.
- Howls and screams fill the air within 1 mile of the lair. Any creature that finishes a short or long rest in this area must succeed on a DC 21 Wisdom saving throw or derive no benefit from the rest.
Githzerai Anarch
Lair Actions
An anarch can use lair actions. On initiative count 20 (losing initiative ties), the anarch can take a lair action to cause one of the following effects; the anarch can't use the same effect two rounds in a row:- The anarch casts the lightning bolt spell (at 5th level), but the anarch can change the damage type from lightning to cold, fire, psychic, radiant, or thunder. If the spell deals damage other than fire or lightning, it doesn't ignite flammable objects.
- The anarch casts the creation spell (as a 9th-level spell) using the unformed substance of Limbo instead of shadow material. If used in Limbo, the object remains until the anarch's concentration is broken, regardless of its composition. If the anarch moves more than 120 feet from the object, its concentration breaks.
- The anarch can magically move an object it can see within 150 feet of it by making a Wisdom check with advantage. The DC depends on the object's size: DC 5 for Tiny, DC 10 for Small, DC 15 for Medium, DC 20 for Large, and DC 25 for Huge or larger.
Regional Effects
The region containing an anarch's lair is warped by its presence, which creates one or more of the following effects:- In Limbo, the anarch can spend 10 minutes stabilizing a 5-mile area centered on it, causing the unformed substance to take whatever inanimate form the anarch chooses. During that process, the anarch determines the shape and composition of the forms created.
- The anarch stabilizes any object created in Limbo and brought to the Material Plane for as long as the anarch remains within 1 mile of it (no action required).
Graz'zt
Lair Actions
On Initiative count 20 (losing initiative ties), Graz'zt can take a lair action to cause one of the following effects: he can't use the same effect two rounds in a row:- Graz'zt casts the command spell on every creature of his choice in the lair. He needn't see each one, but he must be aware that an individual is in the lair to target that creature. He issues the same command to all the targets.
- Smooth surfaces within the lair become as reflective as a polished mirror. Until a different lair action is used, creatures within the lair have disadvantage on Dexterity (Stealth) checks made to hide.
Regional Effects
The region containing Graz'zt's lair is warped by his magic, creating one or more of the following effects:- Flat surfaces within 1 mile of the lair that are made of stone or metal become highly reflective, as though polished to a shine. These surfaces become supernaturally mirrorlike.
- Wild beasts within 6 miles of the lair break into frequent conflicts and coupling, mirroring the behavior that occurs during their mating seasons.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 23 Wisdom saving throw or descend into a madness determined by the Madness of Graz'zt table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Graz'zt
d100 Flaw (lasts until cured)- 01-20 "There is nothing in the world more important than me and my desires."
- 21-40 "Anyone who doesn't do exactly what I say doesn't deserve to live."
- 41-60 "Mine is the path of redemption. Anyone who says otherwise is intentionally misleading you."
- 61-80 "I will not rest until I have made someone else mine, and doing so is more important to me than my own life—or the lives of others."
- 81-90 "My own pleasure is of paramount importance. Everything else, including social graces, is a triviality."
- 91-00 "Anything that can bring me happiness should be enjoyed immediately. There is no point to saving anything pleasurable for later."
Juiblex
Lair Actions
On Initiative count 20 (losing initiative ties), Juiblex can take a lair action to cause one of the following effects: he can't use the same effect two rounds in a row:- Juiblex slimes a square area of ground it can see within the lair. The area can be up to 10 feet on a side. The slime lasts for 1 hour or until it is burned away with fire. When the slime appears, each creature in that area must succeed on a DC 21 Strength saving throw or become restrained. When a creature enters the area for the first time on a turn or ends its turn there, that creature must make the same save. A restrained creature is stuck as long as it remains in the slimy area or until it breaks free. The restrained creature, or another creature who can reach it, can use its action to try to break free and must succeed on a DC 21 Strength check. If the slime is set on fire, it burns away after 1 round. Any creature that starts its turn in the burning slime takes 22 (4d10) fire damage.
- Juiblex slimes a square area of ground it can see within the lair. The area can be up to 10 feet on a side. The slime lasts for 1 hour or until it is burned away with fire. When the slime appears, each creature on it must succeed on a DC 21 Dexterity saving throw or fall prone and slide 10 feet in a random direction determined by a d8 roll. When a creature enters the area for the first time on a turn or ends its turn there, that creature must make the same save. If the slime is set on fire, it burns away after 1 round. Any creature that starts its turn in the burning slime takes 22 (4d10) fire damage.
- A green slime (see the Dungeon Master's Guide) appears on a spot on the ceiling that Juiblex chooses within the lair. The slime disintegrates after 1 hour.
Regional Effects
The region containing Juiblex's lair is warped by his magic, creating one or more of the following effects:- Small bodies of water, such as ponds or wells, within 1 mile of the lair turn highly acidic, corroding any object that touches them. Surfaces within 6 miles of the lair are frequently covered by a thin film of slime, which is slick and sticks to anything that touches it.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 18 Wisdom saving throw or descend into a madness determined by the Madness of Juiblex table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Juiblex
d100 Flaw (lasts until cured)- 01-20 "I must consume everything I can!"
- 21-40 "I refuse to part with any of my possessions."
- 41-60 "I'll do everything I can to get others to eat and drink beyond their normal limits."
- 61-80 "I must possess as many material goods as I can."
- 81-00 "My personality is irrelevant. I am defined by what I consume."
Merrenoloth
Lair Actions
Any ship a merrenoloth is contracted to captain becomes the creature's lair. When fighting on the ship, the merrenoloth can invoke its ability to take lair actions. On initiative count 20 (losing initiative ties), the merrenoloth can take one lair action to cause one of the following effects; it can't use the same effect two rounds in a row:- The ship regains 22 (4d10) hit points.
- A strong wind propels the ship, increasing its speed by 30 feet until initiative count 20 on the next round.
- The air within 60 feet of the ship is filled with howling wind. Until initiative count 20 on the next round, that area is difficult terrain, and when a Medium or smaller creature flies into that area or starts its turn flying there, it must succeed on a DC 13 Strength saving throw or be knocked prone.
Regional Effects
A merrenoloth imbues its vessel with powerful magic that creates one or more of the following effects:- The ship doesn't sink even if its hull is breached.
- The ship always stays on course to the destination the merrenoloth names.
- Creatures the merrenoloth chooses to take on the ship aren't discomfited by wind or weather, though this effect doesn't protect against damage.
Orcus
Lair Actions
On Initiative count 20 (losing initiative ties), Orcus can take a lair action to cause one of the following effects: he can't use the same effect two rounds in a row:- Orcus's voice booms throughout the lair. His utterance causes one creature of his choice to be subjected to power word kill. Orcus needn't see the creature, but he must be aware that the individual is in the lair.
- Orcus causes up to six corpses within the lair to rise as skeletons, zombies, or ghouls. These undead obey his telepathic commands, which can reach anywhere in the lair.
- Orcus causes skeletal arms to rise from an area on the ground in a 20-foot square that he can see. They last until the next initiative count 20. Each creature in that area when the arms appear must succeed on a DC 23 Strength saving throw or be restrained until the arms disappear or until Orcus releases their grasp (no action required).
Regional Effects
The region containing Orcus's lair is warped by his magic, creating one or more of the following effects:- Dead beasts periodically animate as undead mockeries of their former selves. Skeletal and zombie versions of local wildlife are commonly seen in the area.
- The air becomes filled with the stench of rotting flesh, and buzzing flies grow thick within the region, even when there is no carrion to be found.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 23 Wisdom saving throw or descend into a madness determined by the Madness of Orcus table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Orcus
d100 Flaw (lasts until cured)- 01-20 "I often become withdrawn and moody, dwelling on the insufferable state of life."
- 21-40 "I am compelled to make the weak suffer."
- 41-60 "I have no compunction against tampering with the dead in my search to better understand death."
- 61-80 "I want to achieve the everlasting existence of undeath."
- 81-00 "I am awash in the awareness of life's futility."
Yeenoghu
Lair Actions
On Initiative count 20 (losing initiative ties), Yeenoghu can take a lair action to cause one of the following effects: he can't use the same effect two rounds in a row:- Yeenoghu causes an iron spike - 5 feet tall and 1 inch in diameter - to burst from the ground at a point he can see within 100 feet of him. Any creature in the space where the spike emerges must make a DC 24 Dexterity saving throw. On a failed save, the creature takes 27 (6d8) piercing damage and is restrained by being impaled on the spike. A creature can use an action to remove itself (or a creature it can reach) from the spike, ending the restrained condition.
- Each gnoll or hyena that Yeenoghu can see can use its reaction to move up to its speed.
- Until the next initiative count 20, all gnolls and hyenas within the lair are enraged, causing them to have advantage on melee weapon attack rolls and causing attack rolls to have advantage against them.
Regional Effects
The region containing Yeenoghu's lair is warped by his magic, creating one or more of the following effects:- Within 1 mile of the lair, large iron spikes grow out of the ground and stone surfaces. Yeenoghu impales the bodies of the slain on these spikes.
- Predatory beasts within 6 miles of the lair become unusually savage, killing far more than what they need for food. Carcasses of prey are left to rot in an unnatural display of wasteful slaughter.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 17 Wisdom saving throw or descend into a madness determined by the Madness of Yeenoghu table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Yeenoghu
d100 Flaw (lasts until cured)- 01-20 "I get caught up in the flow of anger, and try to stoke others around me into forming an angry mob."
- 21-40 "The flesh of other intelligent creatures is delicious!"
- 41-60 "I rail against the laws and customs of civilization, attempting to return to a more primitive time."
- 61-80 "I hunger for the deaths of others, and am constantly starting fights in the hope of seeing bloodshed."
- 81-00 "I keep trophies from the bodies I have slain, turning them into adornments."
Zariel
Lair Actions
On initiative count 20 (losing initiative ties), Zariel can take a lair action to cause one of the following effects; she can't use the same effect two rounds in a row:- Zariel casts major image four times at its lowest level, targeting different areas with the spell. Zariel prefers to create images of intruders' loved ones being burned alive. Zariel doesn't need to concentrate on the spells, which end on initiative count 20 of the next round. Each creature that can see these illusions must succeed on a DC 26 Wisdom saving throw or become frightened of the illusion for 1 minute. A frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
- Zariel casts her innate fireball spell.
Regional Effects
The region containing Zariel's lair is warped by her magic, which creates one or more of the following effects:- The area within 9 miles of the lair is filled with screaming voices and the stench of burning meat.
- Once every 60 feet within 1 mile of the lair, 10-foot-high gouts of flame rise from the ground. Any creature or object that touches the flame takes 7 (2d6) fire damage, though it can take this damage no more than once per round.
- The area within 2 miles, but no closer than 500 feet, of the lair is filled with smoke, which causes the area to be heavily obscured. The smoke can't be cleared away.
Zuggtmoy
Lair Actions
On Initiative count 20 (losing initiative ties), Zuggtmoy can take a lair action to cause one of the following effects: he can't use the same effect two rounds in a row:- Zuggtmoy causes four gas spores or violet fungi to appear in unoccupied spaces that she chooses within the lair. They vanish after 1 hour.
- Up to four plant creatures that are friendly to Zuggtmoy and that Zuggtmoy can see can use their reactions to move up to their speed and make one weapon attack.
- Zuggtmoy uses either her Infestation Spores or her Mind Control Spores, centered on a mushroom or other fungus within her lair, instead of on herself.
Regional Effects
The region containing Zuggtmoy's lair is warped by his magic, creating one or more of the following effects:- Molds and fungi grow on surfaces within 6 miles of the lair, even where they would normally find no purchase.
- Plant life within 1 mile of the lair becomes infested with parasitic fungi, slowly mutating as it is overwhelmed.
- If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 17 Wisdom saving throw or descend into a madness determined by the Madness of Zuggtmoy table. A creature that succeeds on this saving throw can't be affected by this regional effect again for 24 hours.
Madness of Zuggtmoy
d100 Flaw (lasts until cured)- 01-20 "I see visions in the world around me that others do not."
- 21-40 "I periodically slip into a catatonic state, staring off into the distance for long stretches at a time."
- 41-60 "I see an altered version of reality, with my mind convincing itself that things are true even in the face of overwhelming evidence to the contrary."
- 61-80 "My mind is slipping away, and my intelligence seems to wax and wane."
- 81-00 "I am constantly scratching at unseen fungal infections."
VOLO'S GUIDE TO MONSTERS
Elder Brain
Lair Actions
When fighting inside its lair, an elder brain can use lair actions. On initiative count 20 (losing initiative ties), an elder brain can take one lair action to cause one of the following effects; the elder brain can't use the same lair action two rounds in a row:- The elder brain casts wall of force.
- The elder brain targets one friendly creature it can sense within 120 feet of it. The target has a flash of inspiration and gains advantage on one attack roll, ability check, or saving throw it makes before the end of its next turn. If the target doesn't or can't use this benefit in that time, the inspiration is lost.
- The elder brain targets one creature it can sense within 120 feet of it and anchors it by sheer force of will. The target must succeed on a DC 18 Charisma saving throw or be unable to leave its current space. It can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
Regional Effects
The territory within 5 miles of an elder brain is altered by the creature's psionic presence, which creates one or more of the following effects:- Creatures within 5 miles of an elder brain feel as if they are being followed, even when they are not.
- The elder brain can overhear any telepathic conversation happening within 5 miles of it. The creature that initiated the telepathic conversation makes a DC 18 Wisdom (Insight) check when telepathic contact is first established. If the check succeeds, the creature is aware that something is eavesdropping on the conversation. The nature of the eavesdropper isn't revealed, and the elder brain can't participate in the telepathic conversation unless it has formed a psychic link with the creature that initiated it.
- Any creature with which the elder brain has formed a psychic link hears faint, incomprehensible whispers in the deepest recesses of its mind. This psychic detritus consists of the elder brain's stray thoughts commingled with those of other creatures to which it is linked.
Illithilich
Lair Actions
On initiative count 20 (losing initiative ties), the illithilich can take a lair action to cause one of the following magical effects; the illithilich can't use the same effect two rounds in a row:- The illithilich rolls a d8 and regains a spell slot of that level or lower. If it has no spent spell slots of that level or lower, nothing happens.
- The illithilich targets one creature it can see within 30 feet of it. A crackling cord of negative energy tethers the illithilich to the target. Whenever the illithilich takes damage, the target must make a DC 18 Constitution saving throw. On a failed save, the illithilich takes half the damage (rounded down), and the target takes the remaining damage. This tether lasts until initiative count 20 on the next round or until the illithilich or the target is no longer in the illithilich's lair.
- The illithilich calls forth the spirits of creatures that died in its lair. These apparitions materialize and attack one creature that the illithilich can see within 60 feet of it. The target must succeed on a DC 18 Constitution saving throw, taking 52 (15d6) necrotic damage on a failed save, or half as much damage on a success. The apparitions then disappear.
Ki-rin
Lair Actions
Inside its lair, a ki-rin has the power to conjure objects up to three times per day, using each of the following versions of the power once. One version permanently creates enough objects made of soft, plant-based material - including manufactured objects such as cloth, pillows, rope, blankets, and clothing - to fill a cube 20 feet on a side. The second version enough objects made of wood, or similarly hard plant-based material, to fill a cube 10 feet on a side. The third version creates enough objects made of stone or metal to fill a cube 2 feet on a side, but any materials created in this way last for only 1 hour.Regional Effects
The ki-rin's celestial nature transforms the region around its lair. Any of the following magical effects is possible for travelers to encounter in the vicinity:- Water flows pure within 3 miles of a ki-rin's lair. Any purposeful corruption of the water lasts for no longer than 3 minutes.
- Animals, plants, and good creatures within 3 miles of the ki-rin's lair gain vigor as they evolve toward an idealized form. Such creatures are rarely aggressive toward others that aren't normally prey. Evil creatures can't tolerate the holy atmosphere within the same distance, and usually choose to live much farther from the domain of a ki-rin.
- Curses, diseases, and poisons affecting good-aligned creatures are suppressed when those creatures are within 3 miles of the lair.
- A ki-rin can cast control weather while it is within 3 miles of its lair. The spell's point of origin is always the point outdoors closest to the center of its lair. The ki-rin doesn't need to maintain a clear path to the sky or to concentrate for the change in weather to persist.
- Within 3 miles of the lair, winds buoy non-evil creatures that fall due to no act of the ki-rin or its allies. Such creatures descend at a rate of 60 feet per round and take no falling damage.
Morkoth
Lair Actions
On initiative count 20 (losing initiative ties), the morkoth takes a lair action to cause one of the effects described below:- The morkoth uses its Hypnosis action, originating at a point within 120 feet of itself. It doesn't need to see the effect's point of origin.
- The morkoth casts darkness, dispel magic, or misty step, using Intelligence as its spellcasting ability and without expending a spell slot.
Regional Effects
The island surrounding a morkoth's lair is warped by the creature's presence, creating the following effects:- The morkoth is aware of any new arrival, whether an object or a creature, on its island or in its sanctum. As an action, the morkoth can locate any one creature or object on the island. Visitors to the island feel as though they are being watched, even when they aren't.
- Each time a creature that has been on the island for less than a year finishes a short or long rest, it must make a DC 10 Intelligence (Investigation) check. On a failure, the creature has misplaced one possession (chosen by the player, if the creature is that player's character). The possession remains nearby but concealed for a short time, so it can be recovered with a successful DC 15 Wisdom (Perception) check. An object that is misplaced but not recovered ends up in the morkoth's lair 1 hour later. If the creature later goes to the morkoth's lair, its lost possessions stand out in its perception and are easily recovered.
- Entrances to the morkoth's lair have an enchantment that the morkoth can activate or suppress at any time while it's in its lair and not incapacitated. Any creature within 30 feet of such an entrance and able to see it must make a DC 15 Wisdom saving throw. On a failed save, the creature feels an intense urge to use its movement on each of its turns to enter the lair and to move toward the morkoth's location (the target doesn't realize it's heading toward a creature). The target moves toward the morkoth by the most direct route. As soon as it can see the morkoth, the target can repeat the saving throw, ending the effect on itself on a success. It can also repeat the saving throw at the end of each of its turns and every time it takes damage.
- With a thought (no action required), the morkoth can initiate a change in the water within its lair that takes effect 1 minute later. The water can be as breathable and clear as air, or it can be normal water (ranging in clarity from murky to clear).
Storm Giant Quintessent
Lair Actions
A storm giant quintessent can use lair actions in giant form and while transformed into a storm. On initiative count 20 (losing initiative ties), the giant can take a lair action to cause one of the following effects; the giant can't use the same effect two rounds in a row:- The giant creates a thunderclap centered on a point anywhere in its lair. Each creature within 20 feet of that point must succeed on a DC 18 Constitution saving throw or be deafened until the end of its next turn.
- The giant creates a 20-foot-radius sphere of fog (or murky water within water) centered on a point anywhere in its lair. The sphere spreads around corners, and its area is heavily obscured. The fog lasts until the giant disperses it (no action required), and it can't be dispersed by wind.
- The giant creates a 60-foot-long, 10-foot-wide line of strong wind ( or strong current within water) originating from a point anywhere in its lair. Each creature in that line must succeed on a DC 18 Strength saving throw or be pushed 15 feet in the direction the wind is blowing. The gust disperses gas or vapor, and it extinguishes candles, torches, and similar unprotected flames in its area. Protected flames, such as those of lanterns, have a 50 percent chance of being extinguished.
Regional Effects
The region containing a storm giant quintessent's lair is warped by the giant's presence, which creates one or more of the following effects:- High wind blows within 1 mile of the lair, making it impossible to light a fire unless the location where the fire is lit is protected from the wind.
- Rain, snow, or blowing dust or sand (whichever is most appropriate) is constant within 1 mile of the lair. Rain causes rivers and streams to fill or overflow their banks; snow, dust, or sand form deep drifts or dunes.
- Flashes of lightning and peals of thunder are continual, day and night, within 5 miles of the lair.
Remove these ads. Join the Worldbuilders Guild
Comments