Orcus’s Blessing. The avolakia is immune to disease and its AC includes its Charisma bonus.
Regeneration. The avolakia regains 5 hit points at the start of its turn. If it takes radiant damage, this trait doesn’t function at the start of its next turn. The avolakia dies only if it starts its turn with 0 hit points and doesn't regenerate.
Multiattack (True Form Only). The avolakia makes three attacks: one with its bite and two with its claws.
Bite (True Form Only). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) piercing damage plus 7 (2d6) psychic damage. If the target is a creature, it must make a DC 14 Constitution saving throw. On a failed save, until the end of its next turn, when the creature makes an attack roll or an ability check, it must roll a d8 and reduce the total by the number rolled.
Claws (True Form Only). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (2d4 + 4) slashing damage.
Ghoul Touch. Melee Spell Attack: +9 to hit, reach 5 ft., one target. Hit: 16 (3d6 + 6) necrotic damage. If the target is a creature other than an undead, it must succeed on a DC 17 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success
Spellcasting. The avolakia casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 17):
At will: cause fear, detect magic, dominate monster (targets undead only), gentle repose, mage hand, unseen servant
3/day each: animate dead (as an action), create undead (as an action)
Change Shape. The avolakia transforms into a medium humanoid or back into its true form. Its statistics other than its size are the same in each form. Any equipment it is wearing or carrying isn't transformed.
Hypnotic Voice (Humanoid Form Only). The avolakia casts suggestion using Charisma as the spellcasting ability (save DC 17). If the target can see the avolakia, it makes its saving throw against this spell with disadvantage.