Blindsight. The Dusk wing has blindsight of 90 ft and is blind beyond this range.

Undeath Aura. At the start of each of its turns, the Dusk Wing regains 5 (1d6 + 2) hitpoints

Haunting. A creature that can see the Dusk Wing when it starts its turn must succeed in a DC Wisdom saving throw or be frightened.

Innate Spellcasting. The Dusk Wing's spellcasting ability is Wisdom (spell save DC 14). The Dusk Wing can innately cast the following spells, requiring only verbal components:

3/day each: Darkness, Invisibility, Bestow Curse, False Life

1/day each: Blight, Mislead

Multiattack. The Dusk Wing makes two attacks with its talons.

Beak. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) piercing and 7 (2d6) necrotic damage.

Talons. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Caw of Death (Recharge 5-6). The Dusk Wing lets out a shrill caw. All creatures within 30 feet must succeed on DC 16 Constitution saving throw. Every creature who fails in this way takes 1d6 damage, and the dusk wing gains that many hit points.

The Dusk Wing 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. The Dusk Wing regains spent legendary actions at the start of its turn.

Teleport. The Dusk Wing teleports to an unoccupied space that it can see within 60 feet of it.

Talons (Costs 2 Actions). The Dusk Wing makes one attack with its talons.

Shadow Mark (Costs 3 Actions). The Dusk Wing chooses a creature it can see within 30 feet of it. That creature has disadvantage on strength and dexterity saving throws on its next turn.