Demon-Slayer Sword: Black Divider

Anti Magic: Demon-Slayer Sword: Black Divider (魔法『断魔の剣・ブラックディヴァイダー』) is an Anti Magic spell.

Description
While wielding the Demon-Slayer Sword, the user pushes and condenses the Anti Magic to the edges of the blade. Its size and reach can extend to several times its normal size.

The flat side of the sword could still be used to reflect an attack, and the larger size of the blade allows for wider coverage in a single swing.