Amatsuken

Amatsuken or Amenoken (天の剣, Divine Blade) is a magical item owned by Numen. It is a sword that can store all types of magical energy and use magic energy to attack. By pouring magical energy into it, it greatly enhances both the sword's overall power and brute force. This sword is capable of using Living Magic, one of the Black Arts, by sticking the sword into something which is either inanimate or animate, it doesn't really matter if it's organic or not.