You can savage vulnerable foes so badly they become supernaturally disfigured.

Prerequisite: Wis 17, Improved Unarmed Strike, Wolf Style, Wolf Trip, Knowledge (nature) 9 ranks.

Benefit: Whenever you deal a prone opponent at least 10 points of damage with a natural weapon or unarmed strike, you can savage your foe as a swift action. Your victim becomes disfigured unless it succeeds at a Fortitude save (DC = 10 + 1/2 your character level + your Wisdom modifier). The effects of this disfigurement are identical to those of a bestow curse spell (caster level equal to your character level).