an o-katana I wield in fiction, forged by the infamous Muramasa. once unsheathed it literally cannot return to the sheath unless it tastes blood, can also be used to avenge the death of a friend, just let it taste your friend's blood and it will go after the attacker with you guiding the strikes. It feels if as the sword swings itself you basicaly just angle the strike and hold the blade. I only unsheathe this blade when someone will die. a little over 4 1/2 ft long. the text on the blade translates to "Demonic Sword"
*edit* forgot the the mekugi so I added them lol