Naruto space

The Mangekyo Sharingan (万華鏡写輪眼 ,Mangekyō Sharingan?, lit. "Kaleidoscope Copy Wheel Eye") is a heightened form of Sharingan introduced towards the end of Part I. At that time, the Mangekyo Sharingan is explained to be rare among the members of the Uchiha clan, present only in those who have killed their closest friends.[51] In Part II, this is revealed to be false; after Madara Uchiha became the first to awaken his Mangekyo Sharingan, it became common practice for Uchiha clan members to kill their friends to gain their own.[52] It is also revealed that the Mangekyo Sharingan does not need to be gained by killing a friend; instead, it is activated after the death of anyone the user is close to. Sasuke Uchiha gains his own Mangekyo Sharingan when his brother, Itachi Uchiha, dies of natural causes.[53] Under which circumstances Kakashi Hatake gained his Mangekyo Sharingan has yet to be revealed.

Unlike the regular Sharingan, which appears identical from user to user, the Mangekyo Sharingan's tomoe seal differs between individuals. Similarly, each Mangekyo Sharingan grants the user different abilities. Itachi Uchiha can use his Mangekyo Sharingan to induce extremely potent illusions that can kill his targets, form black flames as hot as the sun and creates a spiritual being that gives ultimate offensive and defensive abilities to him. Kakashi Hatake has used none of Itachi's Mangekyo Sharingan abilities, but is capable of warping objects into other dimensions.[54] One feature shared by all Mangekyo Sharingan, however, is the ability to control the nine-tailed demon fox. Once the Mangekyo Sharingan has been gained, the user suffers from ever-deteriorating eyesight, a process that is aggravated by repeated use and culminates in blindness.[55] One's eyesight can be permanently restored by taking the eyes of a sibling who has the Mangekyo Sharingan, a process that fuses their two Mangekyo Sharingan into one "eternal" form with increased power