Steel Devil Slayer Magic

Steel Demon Slayer Magic(鉄鋼悪霊殺人者魔法 Tekkou Akuryou Satsujinsha Mahou) Is a Caster Magic, Lost Magic, Demon Slayer Magic that utilizes the powers of a steel demon and allows the user to use them with ease. It is mainly used by Kunshin Yutori