Legendary Resistance (3/Day). If Maha fails a saving throw, it can choose to succeed instead.

Aura of Twilight. A 90-foot radius around Maha is plunged into star-flecked darkness, turning bright light into dim light and dim light into darkness. Creatures within this area have disadvantage on Wisdom (Perception) checks that rely on sight and cannot gain the benefits of darkvision.

Despair of the Long Night. Creatures within 60 feet of Maha must succeed on a DC 19 Wisdom saving throw or have their hit point maximum reduced by 3d6. This reduction lasts until the creature finishes a long rest. If a creature's hit point maximum is reduced to 0 by this effect, it dies.

Flyby. Maha doesn't provoke opportunity attacks when it flies out of an enemy's reach.

Keen Hearing and Sight. Maha has advantage on Wisdom (Perception) checks that rely on hearing or sight.

Nightfall. Wherever Maha passes, it leaves behind an area of night that persists for 12 hours. The area is 30 feet wide and 300 feet long, following Maha's flight path. This darkness is magical and cannot be dispelled. Creatures within this area have disadvantage on all attack rolls, saving throws, and ability checks.

Silent Wings. Maha’s flight is unnaturally silent. It cannot be detected by nonmagical means while flying, and it has advantage on Dexterity (Stealth) checks made while airborne.

Multiattack. Maha makes three attacks: one with her beak and two with her talons.

Beak. Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 26 (4d8 + 8) piercing damage.

Talons. Melee Weapon Attack: +15 to hit, reach 15 ft., one target. Hit: 24 (4d6 + 10) slashing damage.

Eclipse Shadow (Recharge 6). Maha summons a shadowy darkness that stretches out in a 60-foot radius around her. Creatures within this area must succeed on a DC 22 Constitution saving throw or be blinded for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Maha 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. Maha regains spent legendary actions at the start of her turn.

Beak Attack. Maha makes a beak attack.
Shadow Step. Maha teleports up to 60 feet to an unoccupied space she can see.
Nightfall (Costs 2 Actions). Maha causes the area within a 120-foot radius of herself to be plunged into magical darkness until the end of her next turn. The area is heavily obscured.