Element of Flame: Kagutsuchi - a dōjutsu that applies shape transformation to the black flames of Amaterasu and allows controlling them at the user's will. Sasuke Uchiha creates Amaterasu with his left eye, and with his right eye gives the flames any shape, turning the incinerating fire into a flexible tool of defense and offense.
With Kagutsuchi, the black flames can be shaped into a barrier of sharp spikes in front of the user, which pierces and burns anyone who touches it. When the ribcage Susanoo is activated, the flames cover the bone segments, creating a blazing defensive sphere. The user is also able to hold the fire in their hand without harm, shape it into a flexible sword that throws projectiles when swung, or wrap the flames around an ordinary blade, greatly enhancing its striking power. If necessary, the flames can be added to Chidori, making its strike even more devastating. All these forms are under the direct control of the user and serve both offense and defense.
