The Mangekyo Sharingan is a powerful Dojutsu Kekkei Genkai possessed by certain members of the Uchiha clan. The awakening of this eye is usually triggered through emotional trauma caused by the death of someone close to the user.
Once awakened, the Mangekyo Sharingan heightens all the powers of the regular Sharingan, along with granting special abilities that are unique to the user. While there have been many users of this eye in Naruto, not all of them have had their Mangekyo abilities revealed. Here are 6 strongest Mangekyo Sharingan abilities and 4 characters whose abilities were never revealed.
10 Strongest Ability: Tsukuyomi
Tsukuyomi is an ability of Itachi Uchiha's right Mangekyo Sharingan and it is arguably the strongest known Mangekyo Sharingan genjutsu in the series. Using this power, Itachi could cast a Genjutsu on his target and trap them in a world where space and time could be freely manipulated by him.
Just being trapped in this Jutsu for one second could prove to be lethal for anyone. Furthermore, this Genjutsu is one of the very few that can actually kill the target, making it even more overpowered.
9 Never Revealed: Madara Uchiha
The legendary Uchiha clan member, Madara was one of the very first people to awaken the power of the Mangekyo Sharingan. Using these eyes, he was able to rise to the very top and fight on par with Hashirama Senju, the God of Shinobi.
Although Madara's Mangekyo Sharingan was, undoubtedly, powerful, what exactly it did was never revealed to fans in the story.
8 Strongest Ability: Amaterasu
Amaterasu is a Mangekyo Sharingan ability used by Itachi Uchiha and his brother, Sasuke Uchiha. In both cases, Amaterasu is accessible through the left eye.
When used, this ability immediately burns the target with black flames that cannot be extinguished until they burn to a crisp. Both Itachi and Sasuke are extremely proficient users of this eye power.
7 Never Revealed: Izuna Uchiha
Izuna Uchiha was Madara's younger brother and just like him, he awakened his Mangekyo Sharingan at an early age. This eye granted him power great enough to fight against Tobirama Senju on an equal footing.
However, just like with Madara, Izuna's Mangekyo Sharingan powers were never revealed to the fans. Izuna died quite young after being severely injured by Tobirama in one of their battles.
6 Strongest Ability: Kamui
Kamui is one of the strongest powers in the entire Narutoverse and it was accessible to both Obito Uchiha and Kakashi Hatake. The former had access to the short variant of this ability and it allowed him to appear intangible by warping parts of his body to the Kamui dimension. He could also warp his entire body or anything in contact with him to the dimension of Kamui instantaneously.
The long variant of this eye was used by Kakashi Hatake and it allowed him to warp away targets at a distance. With enough practice, Kakashi could also use this power on himself.
5 Never Revealed: Indra Otsutsuki
Indra Otsutsuki was the older son of Hagoromo Otsutsuki and the brother of Asura Otsutsuki. He was quite gifted and had inherited the strong powers of his father. Indra had access to the Sharingan, which later became the Mangekyo Sharingan.
However, since he was barely focused on in the story, his Mangekyo powers were never revealed. In the anime, he could use Amaterasu, but it was still unclear what else he could do.
4 Strongest Ability: Kotoamatsukami
Known to be one of the greatest Genjutsu in the Naruto world, Kotoamatsukami is a Mangekyo Sharingan power that was accessible to Shisui Uchiha. Using this ability, Shisui could cast a powerful Genjutsu on one or multiple people at the same time and manipulate them without them knowing about what was happening.
To the target, the decisions would feel like their own, which is what made this power truly fearsome. After Shisui, Itachi's crow, along with Danzo had the power to use this Genjutsu as well.
3 Strongest Ability: Kagutsuchi
Kagutsuchi was used by Sasuke Uchiha through his right eye and it gave him the power to control the flames of Amaterasu freely. While the left eye gave him the power to use black flames at will, the right one gave him the power to apply shape transformation to the flames and manipulate them accordingly.
This power was extremely deadly and it also allowed Sasuke to fuse black flames with other powerful techniques to increase their powers.
2 Never Revealed: Fugaku Uchiha
Fugaku Uchiha is one character whose powers were never truly revealed to the fans. He was a shinobi worthy of competing for the title of the 4th Hokage of Konohagakure, which speaks volumes about his skill.
In the anime, Fugaku Uchiha was shown having the Mangekyo Sharingan, which he awakened during the Third Great Ninja War. Although it wasn't revealed in the manga, Fugaku did have a lot of knowledge of the eye, which implies that he could potentially have had it in the manga as well. Either way, his Mangekyo Sharingan powers were never shown in the story.
1 Strongest Ability: Susanoo
Susanoo is known to be the ultimate ability granted by the Mangekyo Sharingan and it is only accessible to those who have awakened it in both the eyes. Unlike the other powers, this isn't specific to certain individuals. Instead, every Mangekyo Sharingan user is able to use this power as the ultimate form of attack or defense.
It allows the user to create a giant humanoid of chakra that fights on their behalf and protects them. In the full-body form, it is powerful enough to slice apart mountains with a casual slash.