Headbutt

Melee Weapon Attack: +5 to hit, 5 ft., one target, 6 (1d6+3) bludgeoning damage.

Reverberating Howl

Releases an ear-shattering howl in a 30' cone that is audible 300' away. Each creature in that cone must make a DC 13 Dex save. On a failure a creature takes 5 (2d4) thunder and is deafened for 1 min. On a success the creature takes half the damage and isn't deafened. A deafened creature can re-save at end of each of its turns success ends effect on itself.