Amaterasu
Black flames that spring up wherever the eye focuses; whatever they catch burns for twenty seconds, and water won't put them out. Strains the eyes.
Learning it
In the Mangekyo Sharingan: Itachi tree
Learn after: Mangekyo Sharingan (Itachi)
In the Mangekyo Sharingan: Sasuke tree
Learn after: Mangekyo Sharingan (Sasuke)
