Multiattack

The ychen bannog makes one gore attack and one stomp attack.

Gore

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

Stomp

Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 31 (4d10 + 9) bludgeoning damage. If the target is a creature, it must succeed on a DC 21 Strength saving throw or be knocked prone.

Destroying Bellow (Recharge 5-6)

The ychen bannog delivers a fearsome bellow that can be heard up to ten miles away. Structures and unattended objects in a 60-foot cone take 55 (10d10) thunder damage. Creatures in the cone take 27 (5d10) thunder damage and are deafened for 1 hour, or take half damage and aren't deafened with a successful DC 18 Constitution saving throw.