Rod of Cas (Ebon Rod of Ill Will) [Minor artifact]

While it usually remains in the possession of Cas, the moose-headed demigod of spite {HH 19}, sometimes this minor artifact temporarily finds its way into the hands of mortals. This antler-headed scepter acts as a Large +3 vicious heavy mace that deals both bludgeoning and piercing damage. As soon as an opponent has successfully dealt damage to the wielder, the ebon rod instantly acquires the bane weapon property, with its power focused on the type of the creature in question. Thus, if a giant dealt even a single point of damage to the rod’s wielder, the ebon rod would instantly acquire the giant bane property for all future attacks at that giant. The weapon remembers all those who have struck its wielder and will instantly shift to whatever type of bane property is required to match a given attacker.

The ebon rod can never be pulled from its wielder’s hand without permission (making the wielder immune to attempts to disarm him of the ebon rod), until and unless the wielder’s hand is cold and dead. Any enemy of the owner’s who picks up the weapon immediately becomes the target of a phantasmal killer spell (DC 20 + owner’s Cha modifier).

Any attempt to destroy the rod of Cas causes it to teleport instantly to Cas, while the person attempting to destroy it receives all the damage dealt to the ebon rod in its place.

Source: Heroes of Horror, page 134.