Muramasa

Continuing from the previous submission, When Muramasa was put into the river alongside Masamune, any and all thigns that flowed by were cut. Muramasa swords have the reputation of being the ultimate tools of death; swords that lust and crave for blood so much that once drawn, must be satisified before that can be sheathed. Even at the cost of their owner. Muramasa is frequently depicted as a demon sword that takes control of its master and has that person kill until Muramasa inevitably corrupts and destroys that persons soul, then waiting for the next victim to come into possession of it.