Multiattack. The viterminus takes the abyssal screech if it is able and then makes two grasping claw or life drain attacks.

Grasping Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target. Hit: 9 (1d8 + 5) slashing damage and 10 (3d6) necrotic damage. If the target is a medium sized creature or smaller, they are grappled (escape DC 15). The viterminus can only have two creatures grappled at a time.

Life Drain. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target that the viterminus has grappled. Hit: 18 (4d8) necrotic damage and the target has their maximum hit points decreased by half the damage dealt. The viterminus also regains hit points equal to half the damage dealt.

Abyssal Screech (1/day). The viterminus lets out a horrific screech, causing every creature of its choice within 30 ft. to take 14 (4d6) psychic damage and make a DC 16 wisdom saving throw or be frightened for 1 minute. Creatures can attempt this saving throw again at the end of each of their turns.

Spellcasting. The viterminus casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 16, +8 to hit with spell attacks):

At Will: Chaos Bolt, Misty Step

3/day: Fear, Phantasmal Killer, Silence

1/day: Mental Prison