Baba Yaga

Cronesight. Baba Yaga has advantage on Wisdom (Perception) checks that rely on sight. As an action, she can observe a target and magically know its current emotional state. If the target fails a DC 23 Charisma saving throw, she also knows the creature’s alignment and discovers a hidden secret about the target.

Cronespeech. Creatures with an Intelligence of 3 or lower obey Baba Yaga unquestioningly. Once given a command, a creature remains under Baba Yaga's control until either it has finished its task or 24 hours have passed. 

Grandmother’s Teeth. The iron teeth of Baba Yaga are sentient, magical, and airborne dentures that sometimes work at cross-purposes to the Old Witch. If the teeth and Baba Yaga are getting along, the teeth reside inside her mouth, providing her with a bite attack and access to its spell list. Baba Yaga can cast a spell from the teeth’s innate spell list as a bonus action, using her spellcasting ability. Spells cast in this way are removed from the teeth’s spells per day total. If the witch and her teeth are not getting along, the teeth will fly around casting its spells as it wishes (often to the benefit of Baba Yaga’s enemies).

Legendary Resistance (4/Day). If Baba Yaga fails a saving throw, she can choose to succeed instead.

Magic Resistance. Baba Yaga has advantage on saving throws against spells and other magical effects.

Mortar and Pestle. Baba Yaga flies in a large mortar and pestle, which is immune to damage and can’t be the target of spells or effects. While flying, Baba Yaga has half cover from ranged attacks, and doesn’t provoke opportunity attacks when she flies out of an enemy’s reach. If Baba Yaga is knocked prone, stunned, or incapacitated while flying in the mortar, it will gently set her on the ground and disappear for 1 hour. The pestle remains with the witch.

Innate Spellcasting. Baba Yaga’s spellcasting ability is Wisdom (spell save DC 26, +18 to hit with spell attacks). She can innately cast the following spells, requiring no material components:

At will: eldritch blast (17th level), mending, minor illusion, prestidigitation 

5/day each: command, disguise self, tasha's hideous laughter

4/day each: blindness/deafeness, mirror image, tasha's mind whip

3/day each: dispel magic, lightning bolt, sending

2/day each: banishment, greater invisibility, polymorph

2/day each: cold of cone, scrying, synaptic static 

1/day each: circle of death, mass suggestion

1/day each: delayed blast fireball, plane shift

1/day each: glibness, power word stun

1/day each: time stop, weird

Multiattack. Baba Yaga makes two pestle slap attacks and one bite attack, or three pestle slap attacks

Pestle Slap. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 31 (6d8 + 4) bludgeoning damage. The target must succeed on a DC 26 Constitution saving throw or have disadvantage on concentration checks until the end of its next turn.

Bite (if iron teeth are equipped). Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 37 (6d10 + 4) piercing damage and the target must succeed on a DC 26 Wisdom saving throw or be frightened of Baba Yaga until the end of its next turn.

Breath of the Bone Mother (Recharge 5-6). Calling on her elemental powers and her mastery of crone-magic, Baba Yaga exhales a great wind in a 60-foot cone that smells of fetid mires and sausages. Creatures caught in that area must make a DC 23 Constitution saving throw. On a failure, a target takes 58 (13d8) necrotic damage and is affected by the bestow curse spell for 1 minute. On a success, a target takes half the necrotic damage but is not cursed. In addition, each creature damaged by the wind releases a stinking cloud (DC 23 Constitution saving throw against the cloud’s poison) centered on it at the beginning of its next turn. The cloud dissipates after 1d4 rounds.

Crone Step. Baba Yaga teleports, along with any items she is riding or carrying, to an unoccupied space she can see within 30 feet of her.

Denture Spellcasting (if iron teeth are equipped). Baba Yaga can cast and trigger the following spells, as a bonus action, requiring only verbal components. (Spells cast in this manner do not prevent Baba Yaga from casting other spells as an action):

At will: detect magic, message, mind sliver, ray of frost

2/day each: faerie fire, grease, magic missiles

1/day each: blur, silence, suggestion

Dance of the Time Taunter (1/day). When Baba Yaga’s turn ends, she can take an additional turn, by dancing through time. A creature able to see Baba Yaga dance has its understanding of the universe challenged and must succeed on a DC 23 Intelligence saving throw or be stunned until the end of its next turn.

Negate Magic (4/day). When Baba Yaga sees a creature within 60 feet of her casting a spell, she can attempt to interrupt it. If the creature is casting a spell of 8th-level or lower, its spell fails and has no effect. If it is casting a 9th-level spell, then it must succeed on a DC 26 Wisdom saving throw, or the spells fails and has no effect.

Baba Yaga can take 3 legendary actions, choosing from the options listed. Only one legendary action can be used at a time and only at the end of another creature’s turn. She regains spent legendary actions at the start of her turn.

Crone Step. Baba Yaga uses Crone Step

Minor Witchcraft. Baba Yaga casts one spell from her list that is 3rd level or lower, or one from her iron teeth’s list, if it is equipped.

Pestle Slap. Baba Yaga makes one pestle slap attack.

Breath of the Bone Mother (Costs 2 Actions). Baba Yaga uses Breath of the Bone Mother, if it is available.

Major Witchcraft (Costs 2 Actions): Baba Yaga casts one spell from her list that is 4th level or higher.