The Catastrophe Blade is a sword that was wielded by Bowser during The Apocalypse episode. This sword has no known powers, except it only appears when the end is near. Perhaps that means when death is near, since Bowser dies shortly after the blade is pulled. This sword was found in the wastelands after a nuke destroyed the Mushroom Kingdom. This sword may not be considered canon because the episode was confirmed to be a movie that Mario and Peach were watching.