Crota, Son of Oryx

Ultimate Soul. When an enemey within 60 ft is reduced to 0 hit points, Crota summons the Ultimate Soul (10 hit points, AC 10, immune to psychic and poison damage) in an unoccupied space within 5 feet of the enemy. The Ultimate Soul explodes for 35 (14d4) fire damage to all enemies in a 60 feet radius at the start of Crota's next round unless it is destroyed.

Presence of Crota. Within 120 feet of Crota, Son of Oryx, enemies can't regain hit points.

Taken Retreat. When Crota's hit points drop below a quarter of his maximum hit points he teleports far away. He can use this ability only once. When he teleports aways he is engulfed in black and silver fire, turning him irreversibly into Crota, Taken Son.

Multiattack. Crota makes two Crota's Judgement attacks.

Crota's Judgement. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 18 (2d12 + 5) slashing damage.

Dark Shield. Crota, Son of Oryx adds 3 to his AC against one melee attack that would hit it. To do so, Crota, Son of Oryx must see the attacker.

Crota, Son of Oryx 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. Crota, Son of Oryx regains spent legendary actions at the start of his turn.

Poison Cloud (Costs 2 Actions). Crota, Son of Oryx creates a poison cloud at a point it can see within 80 feet. The cloud fills a space within a 10 foot radius of this point. Any creature within the cloud or that ends their turn within the cloud must make a DC 14 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, or half as much damage on a successful one. The cloud creates the effect from Darkness in the area. The cloud lasts for 1 minute or until Crota, Son of Oryx uses this ability again. Crota, Son of Oryx is immune to the damage from this ability and can see through it normally.

Lifeleech (Costs 2 Actions). Target creature must make a DC 15 Constitution saving throw, taking 16 (3d10) necrotic damage on a failed save or half as much on a successful one. Crota, Son of Oryx regains hit points equal to the damage the creature takes.

Sprint. Crota, Son of Oryx, moves up to half of his speed (does not provoke opportunity attacks).

Guard. The next attack against Crota, Son of Oryx has disadvantage.