Magic Resistance. Zephyrax has advantage on saving throws against spells and other magical effects.

Magic Weapons. Zephyrax's weapon attacks are magical.

Azure Fury Aura. Any creature that starts its turn within 20 feet of Zephyrax must succeed on a DC 19 Wisdom saving throw or become frightened until the start of its next turn.

Multiattack. Zephyrax makes three attacks: two with its Glaive of the Abyss and one with its Tail Lash.

Glaive of the Abyss. Melee Weapon Attack: +13 to hit, reach 10 ft., 1 target. Hit: 25 (3d10 + 7) [Slashing] damage, Hit 14 (4d6) [necrotic] damage.

Tail Lash. Melee Weapon Attack: +13 to hit, reach 10 ft., 1 target. Hit: 19 (2d10 + 7) [bludgeoning] damage. The target must succeed on a DC 19 Strength saving throw or be knocked prone.

Void Pulse (Recharge 5–6). Constitution Saving Throw: DC 20, each creature in a 60-foot-cone. Failure: 45 (10d8) Necrotic damage. Success: Half damage. Creatures that fail are also blinded until the end of their next turn.

 Zephyrax 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. Zephyrax regains spent legendary actions at the start of its turn.

Move. Zephyrax moves up to half its speed without provoking opportunity attacks.

Glaive Strike. Zephyrax makes one Glaive of the Abyss attack.

Terrifying Glare (Costs 2 Actions). Zephyrax targets one creature it can see within 60 feet. The target must succeed on a DC 19 Wisdom saving throw or be paralyzed with fear until the end of its next turn.