Headbutt

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (2d4 + 3) bludgeoning damage.

Spear

Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 6 (1d6 + 3) piercing damage, or 7 (1d8 + 3) piercing damage if used with two hands to make a melee attack.

Thunderous Bleat (Recharge 6)

The mountain strider releases a loud bleat in a 15-foot cone. Each creature in the area must make a DC 13 Dexterity saving throw, taking 7 (2d6) thunder damage on a failed save, or half as much damage on a successful one.