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Aeorian Nullifier

Nullifiers are the bane of all magic users, with their physical forms and innate powers shaped specifically to resist and cancel magical effects. Against other foes, a nullifier is no less fearsome for the grotesque mouths filled with razor-sharp teeth that cover its torso—and which set up a cacophony of gnashing that can drive other creatures mad.  

Aeorian Nullifier CR: 12 (8,400 xp)

Large monstrosity, neutral evil
Armor Class: 17
Hit Points: 180 (19d10+76)
Speed: 40 ft

STR

19 +4

DEX

14 +2

CON

18 +4

INT

7 -2

WIS

14 +2

CHA

18 +4

Saving Throws: Wis +6, Cha +8
Skills: Perception +6, Survival +6
Damage Immunities: radiant, necrotic
Senses: darkvision 120 ft., passive Perception 16
Languages: understands Draconic, but can't speak
Challenge Rating: 12 (8,400 xp)

The nullifier’s innate spellcasting ability is Charisma (spell save DC 16). It can innately cast the following spells, requiring no material components:

At will: counterspell (see “Reactions” below), detect magic, dispel magic, see invisibility

1/day: antimagic field


Horrid Gnashing. The nullifier’s mouths gnash incoherently while it can see any enemies. Each creature that starts its turn within 20 feet of the nullifier and can hear it must make a DC 16 Wisdom saving throw. Unless the save succeeds, the creature rolls a d8 to determine what it does during the current turn:  

  • 1–4: The creature is stunned until the end of the turn.
  • 5–6: The creature is frightened until the end of the turn and uses its movement to get as far as possible from the nullifier.
  • 7–8: The creature doesn’t move, and it uses its action to make one melee attack against a random creature (other than itself) if one is within reach. It otherwise does nothing.
  Magic Resistance. The nullifier has advantage on saving throws against spells and other magical effects.

Actions

Multiattack. The nullifier makes three attacks: one with its bites and two with its claws.   Bites. Melee Weapon Attack: +8 to hit, reach 5 ft., one creature. Hit: 17 (2d12 + 4) piercing damage plus 11 (2d10) force damage.   Claws. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 4) slashing damage plus 11 (2d10) force damage, and the target is grappled (escape DC 16) if it’s a creature. The nullifier has two claws, each of which can grapple one creature.

Reactions

Counterspell. The nullifier attempts to interrupt a creature that it can see within 60 feet in the process of casting a spell. If the creature is casting a spell of 3rd level or lower, its spell fails and has no effect. If it is casting a spell of 4th level or higher, the nullifier makes a Charisma check with a DC equal to 10 + the spell’s level. On a success, the creature’s spell fails and has no effect.

Genetic Ancestor(s)

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