Veshrun Keth

Multiattack. The Veshrun Keth makes three attacks: two with Shadowgreat and one with Wing Buffet.

Shadowgreat. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 24 (3d10+5) slashing damage plus 27 (6d8) necrotic damage as Veshrun siphons the target's radiance.

Wing Buffet. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 18 (2d10+5) bludgeoning damage. If the target is a celestial (including aasimars) or a creature that emits light as a spell or innate trait, it takes an additional 18 (4d8) radiant damage and is pushed up to 15 feet and knocked prone (DC 19 Strength save negates the push and prone).

Gloombind (Recharge 5-6). Veshrun stretches out a hand and attempts to bind a creature's inner light. One creature he can see within 90 feet must succeed on a DC 19 Wisdom saving throw or be blinded and suffer 36 (8d8) necrotic damage as a tether of shadow clamps the soul. On a successful save, the target takes half damage and is not blinded. A blinded target can repeat the save at the end of each of its turns, ending the effect on itself on a success.

Eclipse Shroud (1/day). Veshrun engulfs a 30-foot-radius sphere centered on himself in unnatural night for 1 minute. The area is magical darkness that only he can see through. Creatures that start their turn in the area (other than Veshrun) take 22 (5d8) psychic damage as memories of light turn to dread. A creature can end the effect for itself by succeeding on a DC 19 Wisdom save; doing so also forces Veshrun to make a DC 19 Charisma saving throw or have the spell end for everyone (he succeeds automatically on this save against non-divine sources).

Retributive Shadow. When a creature the Veshrun can see attacks him with a melee attack and misses, Veshrun can make a Shadowgreat attack against that creature as a reaction.

Shadow Step. Veshrun teleports up to 60 feet to an unoccupied space he can see in dim light or darkness. He can then make one Shadowgreat attack.

Siphon Glance. Veshrun glares at one creature within 30 feet. The target must succeed on a DC 19 Constitution saving throw or lose the benefit of one spell slot of its choice (if it has spellcasting) or suffer 18 (4d8) psychic damage. On a success, the target takes half damage and keeps its spell slot.

Wing Sweep. Veshrun beats his wings. Each creature of his choice within 20 feet must make a DC 19 Strength saving throw, taking 27 (6d8) bludgeoning damage and being knocked prone on a failed save, or half as much and not prone on a success.