Mark of the Wind

Mark of the Wind (風の爪痕) is a Noble Art of Ayase Ayatsuji.

Description
Mark of the Wind is a Noble Art, that allows the user to leave invisible slashes in the air. By cutting through air, the user leaves behind a vacuum blade. When this vacuum blade is activated it releases a sharp gust of wind that cuts through air.

Weakness
In order for the vacuum blades to be useful, the opponent must be in the same location as them, in order to be cut. If the opponent can figure out the location of the vacuum blades, the ability becomes far less useful.