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. C states that Sasuke manipulates the flames with his right Mangekyō Sharingan whereas he casts Amaterasu with his left. It is unknown what elements this nature entails.