Kusanagi

Kusanagi is a Noble Art used by Ouma Kurogane.

Description
Kusanagi is a used, by compressing air into the Device of Ouma, creating numerous powerful storm like blades, which can reach over 50 meters in height.

Weakness
Kusanagi's power depletes with each usage, although with the third usage, it was still strong enough to withstand Nene's Black Sword・Yatagarasu. It also requires some time to activate.

Trivia

 * Kusanagi is named after a one of the Three Imperial Regalia of Japan, the sword named Kusanagi no Tsurugi.