shisui sharingan

Itachi Uchiha awakened his Mangekyō Sharingan after witnessing the suicide of his best friend, Shisui Uchiha, shortly before the Uchiha Clan Downfall. mangekyou sharingan sasuke With either Mangekyō, he could use Tsukuyomi , an extremely powerful genjutsu that distorts the victim's perception of time