From Pathfinder Howl of the Wild, which isn't enabled.

Horns (Minotaur)

ANCESTRY FEATURE 1

Your sharp horns are as deadly as spears. You have a horns unarmed attack that deals 1d8 piercing damage. Your horns are in the brawling group and have the unarmed trait.

Pathfinder Howl of the WildORC