Blaze Release

is an advanced chakra nature kekkei genkai of the Uchiha clan, that lets them produce black flames. Sasuke Uchiha uses this technique when manipulating the unquenchable black flames of Amaterasu, fashioning them into various weapons and defences. C states that Sasuke manipulates the flames with his right Mangekyō Sharingan whereas he casts Amaterasu with his left. It is possible that this nature is formed from fire and lightning chakra, using the Amaterasu to form the flames and using lightning to manipulate them utilizing Sasuke's skill with changing the shape and form of his Chidori.