Auntie Greillach

Aura of Blood Thirst. If the hag isn’t incapacitated, any creature that has Rampage can make a Bite attack as a bonus action while within 10 feet of the hag.

Grafted Sisters. Auntie's coven sisters, a green hag and a night hag, are grafted into her body. Their eyes and lips are sewn shut, preventing them from casting spells, but if they can see or speak they can cast their innate and coven spells, wasting spell slots and harming Auntie whenever they can. On a critical hit against Auntie, a creature may choose to forgo damage in order to free the eyes or mouth of a sister. Additionally, if the night hag's heartstone comes into contact with Auntie's body, she can go ethereal and escape.

Multiattack. The annis makes one Bite attack and two Claw attacks, or one Flail of Chaos attack, one Flail of Pain attack, and one Flail of Paralysis attack.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 15 (3d6 + 5) piercing damage.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 15 (3d6 + 5) slashing damage.

Crushing Hug. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 36 (9d6 + 5) bludgeoning damage, and the target is grappled (escape DC 15 if it is a Large or smaller creature. Until the grapple ends, the target takes 36 (9d6 + 5) bludgeoning damage at the start of each of the hag’s turns. The hag can’t make attacks while grappling a creature in this way.

Flail of Chaos. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 10 (1d10 + 5) bludgeoning damage, and the target must make a DC 16 Wisdom saving throw. On a failed save, the target must use its reaction, if available, to make one melee attack against a random creature, other than the hag, within its reach. If there’s no creature within reach, the target instead moves half its speed in a random direction.

Flail of Pain. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 10 (1d10 + 5) bludgeoning damage plus 16 (3d10) psychic damage.

Flail of Paralysis. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 10 (1d10 + 5) bludgeoning damage, and the target must succeed on a DC 16 Constitution saving throw or be [condition]paralyzed[/paralysis] until the end of its next turn.

Spellcasting. The hag casts one of the following spells, using Charisma as the spellcasting ability (spell save DC 13):

3/day each: disguise self (including the form of a Medium Humanoid), fog cloud

Shared Spellcasting. While all three members of a hag coven are within 30 feet of one another, they can each cast the following spells from the wizard’s spell list but must share the spell slots among themselves:

1st level (4 slots): identify, ray of sickness

2nd level (3 slots): hold person, alter self

3rd level (3 slots): bestow curse, counterspell, erupting earth

4th level (3 slots): stoneskin, polymorph

5th level (2 slots): contagion, scrying

6th level (1 slot): eyebite

For casting these spells, each hag is a 12th-level spellcaster that uses Intelligence as her spellcasting ability. (Spell save DC 13, +5 to hit with spell attacks)