Blue Yian Kut-ku

Charge. If the yian kut-ku moves at least 20 feet straight toward a target and then hits it with a Body Slam Attack on the same turn, the target takes an extra 19 (3d12) bludgeoning damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw or be knocked prone.

Flyby. The yian kut-ku doesn't provoke an opportunity attack when it flies out of an enemy's reach.

Sensitive Ears. If the yian kut-ku takes thunder damage or a thunder spell is used within 60 feet of it, it must succeed on a DC 15 Constitution saving throw or become stunned until the start of its next turn.

Multiattack. The yian kut-ku makes three attacks: two peck attacks and one tail attack.

Peck. Melee Weapon Attack. +6 to hit, reach 5 ft., one target. Hit 12 (2d8 + 3) piercing damage.

Tail. Melee Weapon Attack. +6 to hit, reach 5 ft., one target. Hit 14 (2d10 + 3) bludgeoning damage.

Body Slam. Melee Weapon Attack. +6 to hit, reach 5 ft., one target. Hit 22 (3d12 + 3) bludgeoning damage.

Fireball (recharge 5-6). The yian kut-ku exhales a fireball to a point within 60 feet of it. Each creature in a 10- foot radius sphere centered on that point must make a DC 13 Dexterity saving throw. On a failed save, the creature takes 27 (6d8) fire damage, or half as much damage on a successful one.