Soujuutou

Soujuutou (操獣刀 ,Sōjūtō, literally "Virtuous Beast Sword"): A legendary katana that can summon Beast-Fist God SaiDain. It was originally used by Bruce E and referred to by his Fist Sage students as the ultimate weapon to end the battle with Confrontation Beast-Fist Akugata. It's a treasure of the Beast-Fist School and it is said that Brusa Ee's power dwells within it. Because of this, the sword allows the user to tear down the Sevenfold Barrier of Seven Sages and invoke SaiDain's power.