Keen Sight. The achiyalabopa has advantage on Wisdom (Perception) checks that rely on sight.

Spellcasting. The achiyalabopa is a 9th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 21, +8 to hit with spell attacks). It requires no material components to cast its spells. The achiyalabopa has the following wizard spells prepared: 

Cantrips (at will): blade ward, guidance, resistance

1st level (4 slots): alarm, sanctuary, shield of faith

2nd level (3 slots): aid, prayer of healing, warding bond 

3rd level (3 slots): beacon of hope, counterspell, nondetection

4th level (3 slots): aura of life, private sanctum

5th level (1 slot): hallow

Multiattack. The achiyalabopa makes two attacks: one with its beak and one with its talons,

Beak. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 27 (4d8 + 9) piercing damage.

Talons. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 23 (4d6 + 9) slashing damage, and the target is grappled (escape DC 19). Until this grapple ends, the target is restrained, and the achiyalabopa can't use its talons on another target.

Feathers. Ranged Weapon Attack: +13 to hit, range 30 ft., one target. On a hit, the target of the attack and each creature within 5 feet of it must make a Dexterity saving throw (DC 16). A creature takes 17 (2d4 + 9) piercing damage on a failed save, or half as much damage on a successful one.

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

Detect. The achiyalabopa makes a Wisdom (Perception) check.

Feathers. The achiyalabopa makes a ranged attack with its feathers. 

Cast a Spell (Costs 3 Actions). The achiyalabopa casts a spell from its list of prepared spells, using a spell slot as normal.