Ittou Shura

Ittou Shura (lit. Blade of Carnage) is the Noble Art of Ikki Kurogane.

Description
Ittou Shura is a noble art form of Ikki's, that forcefully removes all of Ikki's physical limits, allowing him to gain tremendous power. This although grand is only able to be maintained for a minute, and since it takes a tremendous amount of effort on Ikki's part he can only use it only once per day.