The Femur of Toomler is a vampiric artifact.
This relic has very little supernatural power, but is valued by many Tzimisces. The bone, supposedly made from a fourth generation Tzimisce, has the power to cause aggravated damage when striking a vampire. Toomler allegedly possessed very unusual powers, including the ability to disassemble parts of his body and then reconnect them. The femur was supposedly used after Toomler’s demise by another Tzimisce to kill one of the founders of the Tremere.