Aeorian Reverser

Large monstrosity, neutral evil

Armor Class 15 (natural armor)

Hit Points 133 (14d10 + 56)

Speed 40ft Fly: -1ft Climb: 40ft

STR

21 +5

DEX

16 +3

CON

18 +4

INT

6 -2

WIS

14 +2

CHA

8 -1

Saving Throws Wis +5, Cha +2

Skills Perception +5, Stealth +6, Survival +5

Damage Immunities necrotic, radiant

Senses Darkvision 120 ft., passive Perception 15

Languages understands Draconic but can't speak

Challenge 8 (3,900 XP)

Magic Resistance. The reverser has advantage on saving throws against spells and other magical effects.

Actions

Multiattack. The reverser makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +8 to hit, range 5 ft., one creature. Hit: 11 (1d12 + 5) piercing damage plus 6 (1d12) force damage.

Claws. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d6 + 5) slashing damage plus 7 (2d6) force damage.

Reactions

Reversal. When a creature the reverser can see within 30 feet of it regains hit points, the reverser reduces the number of hit points regained to 0, and the reverser deals 13 (3d8) force damage to the creature.

A reverser is a terrible foe in melee, laying into other creatures with teeth and claw. But the chaos it imposes is more fearful by far, as its enemies' healing magic are unraveled and turned against them.