Ittou Shura

Ittou Shura (一刀修羅, One-Blade Shura) is the original Noble Phantasm of Haise Ishida and is his first, most used ability with his innate power "Currents" where he used what he believed to "Doubling Physical Attributes" to use it. Ittou Shura is the Noble Art, in which Haise is able to amass all his bodies vigor and stamina while ignoring the survival instincts that prevent humans from using their full strength, then multiplies this several dozen times granting him tremendous power, which can be maintained for just one minute and as such, it is referred to as his strongest minute. This is done by using his manipulation over his bio electricity and blood, multiplying his ability to call upon his bodies full power or "Hysterical Strength" to create a superhuman level of power

Weaknesses
Ittou Shura expands and drains all of his stamina and strength for a minute, so Haise will be unable to fight using it for an extended period of time. Its usage is limited to once per day due to the incredible strain that it puts on him and has visited the hospital a number of times after using it, while at times having enough strength to make it to his room.

Though the power granted by Ittou Shura is tremendous, it doesn't grant him a guaranteed victory. It is first shown in his initial match of the "Seven Star Sword Art Festival" against Shiori Akizuki, her use of the Toudou Style and Base Prana acceleration proved too strong for him to match leaving him unable to stop the finishing blow from her, costing him the match.