Chaos Vortex

The damage that the Selefer caused in the Silent Forest is already bad enough by just looking at the environment. But with the destruction of the area around it they created something far more darker, chaos magic given form.

— High Sage Syronikir

Within areas affected by Chaos Corruption there is a variety of monstrosities that one can encounter. The worst of all is perhaps the Chaos Vortex. It is still shrouded in mystery as there are only few who encounter it and live to tell the tale.
But from what the few accounts that do reach the civilised world we know a few things. That it is without a defined form and that it can spawn various chaos monstrosities. This is why it is generally assumed that it has a form of connection to the Primal Chaos itself.

Extra Information

Scientific Name

kadrin . neraxa (Kadrin Neratha)

Name

Chaos Vortex

Origin

Can only be found in areas affected by Chaos Corruption such as the Silent Forest

Lifespan

Unknown

Biology

Not much is known about Chaos Vortex as those who got close to it died. The information we have is mostly from people who saw it killing some of their companions and then running away.

Physiology

The Chaos Vortex when not moving would actually look like a very large Chaos Crystal. It has the same dark purple color and its outer layer at first sight does look solid.
It is only once it starts its ambush that it starts to change form. Once this happens the previously solid looking crystal seems to liquify and sometimes evens float up to a meter in the air. This new form gives the Chaos Vortex much flexibilty as it can portrude sections of its form up to 10 meter to attack.
The favorite method of killing its victims is assumed to be engulfing as this appears in all survivors accounts. One account even mention that he could see the Chaos Vortex changing his companion and make him look similar to those affected by Chaos Corruption.
Things like reproduction or required food of the chaos vortex are as of yet still unknown.

Chaos Crystal by Guild Wars 2, Dragonfall art

Silent Forest

Open full size

The Silent Forest is believed to have been the site of an ancient battle which went terribly wrong. Today it is a haunted place filled with petrified trees, permanent mist and according to survivors untold horrors.

Climate

The Chaos Vortices can only be found in areas affected by Chaos Corruption. A prime example of this is the Silent Forest where many expeditions were undertaken of which almost all completely failed. Thse expedtions, however, did give the basic insight into these beings that we currently have.
It is not really known if the vortices are a result of the corruption around it or are actually the ones spreading it further. Some theorise that it is Chaos magic given form and that many of them could already be quite ancient.
Some myths claim that these vortices can be found outside chaos areas when they accompany a Chaos Tempest. None of these claims, however, have thus far been verified.

Chaos Vortex Stats

Chaos Vortex CR: 17

Huge aberration, chaotic evil

Armor Class: 20

Hit Points: 215 (17d12 +105)

Speed: 20 ft , can hover

STR

21 +5

DEX

11 +0

CON

25 +7

INT

20 +5

WIS

12 +1

CHA

18 +4

Damage Immunities: bludgeoning, piercing, and slashing from nonmagical weapons, psychic, poison, acid

Condition Immunities: charmed, exhaustion, frightened, grappled, paralyzed, petrified, poisoned, unconscious

Senses: truesight 240 ft.

Challenge Rating: 17

Attack on the mind All melee attacks by the Chaos Vortex are considered magical. In addition to the regular damage they also deal psychic damage as victims are affected by short bouts of insanity.
Immutable Form The Chaos Vortex is immune to any spell or effect that would alter its form.
Legendary Resistance (2/Day) If the vortex fails a saving throw, it can choose to succeed instead.
Living Chaos Portal (3/Day) The Chaos Vortex opens a portal to the Primal Chaos and can summon up to 3 chaos creatures per day with a combined CR of 8. This can be either one creature or several. Every summoned creature counts as one use. If the max CR is reached no more creatures can be summoned.

Actions

MultiattackThe Chaos Vortex can make three protrusion attacks. One of these can be exchanged for an engulf attack on a hit of a protrusion attack.
Protrusion. Melee Weapon Attack:+11, Reach 30ft, one target Hit: 18 (2d10+5) bludgeoning damage and 6(1d10) psychic damage.
EngulfThe target is engulfed by the Chaos Vortex and is considered grappled (DC 18). When a creature begins its turn while engulfed it needs to make an intelligence saving throw (DC 18) or suffer 11(2d10) psychic damage or half as much on a success. A total of three creatures can be engulfed by the Chaos Vortex. Trying to free a creature requires a (DC 19) strength check.
Chaos Mind (Recharge 5-6) Each creature within a 20 ft radius needs to make an intelligence saving throw (DC 18) as the Chaos Vortex invades the mind. The victims see chaotic images in their mind causing short term insanity. The creatures take 4d10 psychic damage or half as much on a success. Those that fail have disadvantage on attack rolls for the next turn.

Legendary Actions

Protrusion The Chaos Vortex makes one protrusion attack.
Corruption (costs 2 actions) The Chaos Vortex unleashed a wave of Chaos energy. Each creature within 10 ft. takes 5 (1d8) necrotic damage and each creature must make a (DC 10) Constitution saving throw or be affected with Chaos Corruption. If this is not healed with Greater Healing in the first hour the disease can progress further.