Hargulka's Rage

Hargulka's Rage price 24,312 gp Slot none CL 10th Weight 16 lbs. Aura moderate evocation This +1 flaming heavy mace is made from a troll’s skull and it flames automatically when grasped and wielded; it need not be activated. Once per day, the wielder can command the skull to float off the mace’s haft and attack on its own as a spiritual ally for 1 minute, with an attack bonus equal to the wielder’s base attack bonus +3.
The skull is made of bone and is not considered a force effect; however, it has the same immunity to physical attack as a normal spiritual ally. Each successful hit by the skull deals 1d8+5 points of damage plus 1d6 points of fire damage. While the skull is detached, the haft can be wielded as a +1 light mace. If the wielder has regeneration, and uses this mace to kill a creature with regeneration, the wielder’s own regeneration cannot be bypassed for one minute.
CONSTRUCTION REQUIREMENTS COST 12,312 gp Craft Magic Arms and Armor, flame blade, flame strike, or fireball, spiritual ally