[AlexanderHowl]

Well, a skull possesses a default DR 2. Add another DR 2 from the structure required to support the horns (costing 3 CP) and another DR 2 from their hide (costing 6 CP), and you end up with DR 6. Add ST 25, HT 12, Fit, High Pain Threshold, and Berserk (6-). A 6d piercing attack to the brain would deal an average of 60 damage after DR, reducing the HP to -35, but the creature would avoid death and unconsciousness on a roll of 17-, and then they would proceed to murder everyone in view.