The Overtaken

Terrifying Visage. Creatures starting their turn within 15ft of The Overtaken must make a DC 14 Wisdom save or be Frightened for 1 minute. An effected creature may remake the save at the end of their turn to end the effect. 

Multiattack. The Overtaken may make two attacks with its Claw.

Claw.  Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 16 (2d10 + 5) slashing damage. On hit, the target must succeed a DC 14 Strength save or be Knocked prone.

Rancid Spray (Recharge 4-6) Breath Attack: The overtaken sprays acid in a 25 ft cone. Anyone within the cone must make a DC 14 Dexterity saving throw or take 28 (8d6) acid damage. Taking half as much damage on a successful save.

Quasit Caller. Quasits begin to claw their way out of The Overtaken's skin. As a bonus action, The Overtaken may let them escape spawning 5 (2d4) Quasit.

Quasit Consumer. The Overtaken may reclaim what has been lost. As a bonus action The Overtaken may consume a Quasit within 5ft of them restoring 1d8 health if the Quasit is at max health, 1d6 if it is Bruised (half HP), and 1d4 if it is Bloodied (quarter HP).