Buggane

From the introduction: Bugganes are humanoid creatures that can change size from roughly 8ft tall to roughly 6 inches in height. Bugganes are covered in black hair, have claws, and a large red mouth with tusks. Bugganes are the enemies of fairies and are sometimes used by the fairy lords to chase humans out of their forests. Bugganes are unable to cross water or stand on hollowed ground.