Demon-Slasher Katana

The Demon-Slasher Katana (斬魔の刀) is an Anti Magic Weapon. Originally Yami Sukehiro's katana, the sword is transformed by the Anti Magic in Asta's devil arm when Yami passes the sword to Asta.

Description
The katana is summoned out of an opened grimoire, inside which it is stored in the form of writing. The user can easily summon the katana at will without consuming any magical power.

Like the other Anti Magic Weapons, the katana is capable of cutting through magic and spells with its edge. It is also capable of releasing flying slashes of Anti Magic.

As Asta's fourth sword, it is capable of selective cutting, meaning it can release a slash that only damages the intended target, without causing any harm to what it wants to protect.