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 while ignoring survival instincts of the human body. This although grand is only able to be maintained for a minute, and since it takes a tremendous amount of strength from Ikki and places a huge stress on his body, hence can only use it only once per day falling into severe fatigue after each usage.

During his match against Tohka Todo, Ikki uses an improved version of the Ittou Shura, Ittou Rasetsu, to defeat his opponent.