Mangekyō Sharingan

The is a heightened form of Sharingan. The Mangekyo Sharingan is distinguished from a normal Sharingan through its appearance, which changes the form of the tomoe seal. The appearance differs from user to user; Kakashi's and Itachi's both resemble pinwheels, Madara's and his brother's more look like more detailed forms of the basic three-tomoe Sharingan, and Sasuke's looks like a star. To acquire the Mangekyo Sharingan someone close to them must die. To expedite this occurrence, most Uchiha throughout history have killed their closest friend in order to meet this criteria. How Kakashi gained his has yet to be explained.

The Mangekyo Sharingan gives a user access to powerful and forbidden techniques. It is unclear if these techniques are unique among individuals; no two Mangekyo Sharingan users have been seen using the same jutsu, but Madara Uchiha appears knowledgeable of all Mangekyo Sharingan techniques. The only know exception to this is Amaterasu, which Itachi implants in Sasuke's eyes.

Over time, use of the Mangekyo Sharingan will deteriorate the user's eyesight to the point of blindness. Only by taking the eyes of one's sibling can vision be restored, a process that results in the creation of the. Only three characters still alive in the series possess a Mangekyo Sharingan: Kakashi, Madara, and Sasuke.

Itachi Uchiha
Itachi Uchiha gained the Mangekyo Sharingan by killing his best friend. With the Mangekyo Sharingan, Itachi is able to use at least three of the most powerful jutsu of the Uchiha clan. The first is Tsukuyomi, a powerful genjutsu that allows him to torture opponents for what seems like days in a matter of moments. The second technique is Amaterasu, which creates black flames at the user's focal point that continue to burn until the target is reduced to ash. The last of these techniques is Susanoo. The technique summons a massive ethereal warrior, which then fights on behalf of Itachi and shields him from all attacks.

All of these techniques, use massive amounts of chakra and, in addition to damaging his eyesight, put a great deal of strain in his body. During his battle with Sasuke he claims to want to take Sasuke's eyes so that he can restore his eyes to their former glory. During the resulting battle, Zetsu notes that the "Left Mangekyo" possesses the Tsukuyomi, while the "Right Mangekyo" possesses the Amaterasu.

Kakashi Hatake
Kakashi Hatake developed his own version of the Mangekyo Sharingan during the timeskip. Kakashi mastered a technique that creates a localized interdimensional space-time ninjutsu called Kamui, allowing him to target any object and send it to another dimension. The attack requires considerable effort to aim precisely and appears to leave Kakashi's chakra significantly drained; he collapses after using the technique three times even at full strength in a single day. It is not known how he awakened his Mangekyo Sharingan, as he had stated long before he acquired it that everyone close to him was dead.

Madara Uchiha
Madara Uchiha was the first Uchiha to gain the Mangekyo Sharingan. His took the form of a ring with three circular holes in it. He eventually grew blind from overusing it, and only by taking his younger brother's eyes did he regain his sight. This also gave him an "eternal" Mangekyo Sharingan that gave him great power. His Eternal Mangekyo Sharingan looks identical in appearance to Madara's first Mangekyo combined with Izuna's Mangekyo.

With the Eternal Mangekyo Sharingan, Madara mastered all the secrets and techniques of the Mangekyo Sharingan. In addition, according to Itachi, Madara unlocked a final and, as yet unknown, ultimate eye technique. The only technique that Madara has shown is an unnamed space/time ninjutsu which makes him nearly invulnerable, but it's unclear if this is a result of his Mangekyo Sharingan.

Madara was able to use his Sharingan in the past to control the Nine-Tailed Demon Fox. He has since claimed that gathering the nine tailed beasts will return his eyes to their former glory, suggesting his Sharingan have become damaged.

Izuna Uchiha
Izuna Uchiha acquired his Mangekyo Sharingan soon after Madara did. His took the appearance of three bars stretching out of his pupil. Madara later took Izuna's eyes to regain his vision.

Sasuke Uchiha
Sasuke Uchiha awakens his Mangekyo Sharingan after the death of his older brother, Itachi. Sasuke's Mangekyo Sharingan takes the appearance of a six-sided star often resembling the atomic model. Unlike other Sharingan, which have a black design and red background, Sasuke's is the first one that is shown to have a red design and a black background.

The only unique ability Sasuke has displayed is Amaterasu, which Itachi implanted within his eyes before his death. When Sasuke first uses it unintentionally against Madara, his eyes take the appearance of Itachi's Mangekyo Sharingan. When he later uses it on his own they take the form of his Mangekyo Sharingan. He has shown himself able of putting out the flames. He suffers from the same drawbacks from using it as Itachi did, and his eyesight has similarly started to corrode. Sasuke has also been seen using genjutsu with his Mangekyo Sharingan, though none have been named.