|Image of an all metal mace to give a general idea.|
It is + 2 to hit and damage. When used against prisoners within the grounds of a prison or jail, or against anyone in manacles or chains, the victim must save vs petrify or paralyze at -2. Failure indicated a broken bone resulting in halved movement and -2 (or -10%) on all physical activities for a month. On a natural 20, the damage to the bones is so severe that without magical healing within 2 turns a limb must be amputated.
Sages believe that a minor demon was trapped withing the weapon to give it such a thirst for the marrow within bones.