The Dark Dragon Blade (魔刀 「黒龍丸」 Matou "Kokuryuumaru"?, Lit. Devil Sword Dark Dragon) is the sister blade to the Dragon Sword. It was carved by the fiends out of the bones of the Dark Dragon. The power of the Dark Dragon Blade grows with each killing that occurs within its vicinity. When a person breaks the seal of the Dark Dragon Blade,