Demon-Dweller Sword

The Demon-Dweller Sword (Shukuma no Tsurugi) is an ancient Anti Magic Weapon in Black Clover that Asta finds in a hidden room of a dungeon's treasury. Like his other swords it is stored as writing inside an open grimoire and is summoned at will without any magic power. The blade carries black markings and is mostly covered in dirt, and the hilt is ornate, with a four-sided guard, a spiral grip and a sphere for a pommel. Its edges cut through magic, but against anything else it acts as a blunt weapon.

Its original ability is to absorb spells and release them as a flying slash: once it has taken in enough magic, the black markings glow in the colour of the absorbed attribute and a swing sends out a slash with that attribute's properties, as it did with Noelle's Water Magic, Gauche's Mirror Magic, Yami's Dark Magic and Lemiel's Light Magic. Filled with Anti Magic instead, it fires the Black Slash. The sword is immensely heavy, passively drains the magic of anyone holding it, and can drain an opponent it impales.

It can also link its wielder to allies, drawing magic power from them over a long distance or sending them magic and information, and after learning Zetten Asta uses it to cloak allies in Anti Magic alongside their own magic, calling them his Comrademons.