The Mangekyō Sharingan (万華鏡写輪眼; Literally meaning "Kaleidoscope Copy Wheel Eye"), noted to be the "heavenly eyes that see the truth of all of creation without obstruction" (天壌の理を掌握せし瞳, tenjō no kotowari wo shōaku seshi hitomi),1 is an advanced form of the Sharingan that has only been activated by a handful of Uchiha.2 It was also awakened by Kakashi Hatake — a non-Uchiha.3
Itachi implanted a trap for Tobi, if sasuke were to meet him, the amaterasu. Mangekyō sharingan
The elder brother of Uchiha Sasuke, missing nin of Konohagakure. Slaughtered his entire town including his family but left his one little brother (Sasuke) alive to seek revenge against him. Was once captain in his ANBU team, possesses the SHARINGAN, and is totally bad-ass.
"Foolish brother... if you want to kill me.. then hate, spite, and survive pathetically, run, and run... and cling desperately to life."