Sensitive Hearing. If Yian Garuga takes Thunder Damage, a Thunder spell is used within 30 ft. of it or it is hit by an explosion; it must succeed on a DC15 Constitution saving throw or become stunned until it's next turn.

Flyby: Yian Garuga does not provoke opportunity attacks when it flies out of an enemy's reach.

Multiattack. Yian Garuga can make two peck attacks and a trample or flame ball and trample

Peck. Melee Weapon Attack: +7 to hit, reach 5 ft., 3 targets. Hit: 57 (10d12 +8) [Bludgeoning] damage. 

Talons. Melee Weapon Attack: +6 to hit, reach 10ft, 1 target. Hit: 26 (8d12 + 8) [Piercing] damage.

Tail Smack. Melee Weapon Attack: +3 to hit, reach 8ft, multi-target. Hit: 61 (8d12 + 5) [Bludgeoning] damage + (5d10) [Poison] damage. Target must make a DC16 Constitution saving throw or be poisoned for d10 turns.

Trample. Melee Weapon Attack: +8 to hit, reach 20ft., 1 target. Hit: 81 (12d12 + 12) [Bludgeoning] Damage. The target must make a DC15 Dexterity or Strength saving throw or be knocked prone. 

Flame Ball. Ranged Weapon Attack: +8 to hit, range 30/90 ft., 3 targets. Hit: 79 (11d12 + 12) [Fire] damage. 

Ferocious Roar (5/day). When Yian Garuga spots an enemy, it let's out a loud roar in a 20 ft. radius all around it. Targets within range must make a DC16 Constitution saving throw or be frightened and stunned for 1 turn.