Kusanagi no Tsurugi

The Kusanagi no Tsurugi is a Legendary sword in the possession of Tatsumaru Otsutsuki. It takes the appearance of a regular katana of average length. By channelling his exceptionally potent chakra through the blade, Tatsumaru can increase it's cutting power exponentially, allowing it to easily cut through one of the arms of Madara Uchiha's ultimate Susanoo.