Legendary Resistance (5/Day). If Yeenoghu fails a saving throw, he can choose to succeed instead.

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

Regeneration. Yeenoghu regains 20 hit points at the start of his turn. If he takes radiant damage, this trait doesn’t function at the start of his next turn. Yeenoghu dies only if he starts his turn with 0 hit points and doesn’t regenerate.

Multiattack. Yeenoghu makes one bite attack and two fist attacks or three Flail attacks.

The Butcher (+3 Flail). Melee Weapon Attack: +21 to hit, reach 15 ft., one target. Hit: 32 (3d12 + 13) force damage. If it’s his turn, Yeenoghu can cause the target to suffer one of the following additional effects, each of which he can apply only once per turn:

Confusion. The target must succeed on a DC 21 Wisdom saving throw or be affected by the confusion spell until the start of Yeenoghu’s next turn.

Force. The target takes an extra 19 (3d12) force damage.

Paralysis. The target must succeed on a DC 21 Constitution saving throw or be paralyzed until the start of Yeenoghu’s next turn.

Bite. Melee Weapon Attack: +18 to hit, reach 10 ft., one target. Hit: 26 (3d10 + 10) acid damage.

Fist. Melee Weapon Attack: +18 to hit, reach 10 ft., one target. Hit: 23 (3d8 + 10) force damage.

Spellcasting. Yeenoghu casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 21):

At will: detect magic

3/day each: dispel magic, fear, invisibility

1/day: teleport

Yeenoghu can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Yeenoghu regains spent legendary actions at the start of his turn.

Charge. Yeenoghu moves up to his speed.

Swat Away. Yeenoghu makes one Flail attack. If the attack hits, the target must succeed on a DC 26 Strength saving throw or be pushed up to 15 feet in a straight line away from Yeenoghu. If the saving throw fails by 5 or more, the target is also knocked prone.

Savage (Costs 2 Actions). Yeenoghu makes a separate Bite attack against each creature within 10 feet of him.