mangekyou sharingan
A powered up version of the Sharingan from Naruto. Every user of this eye has their own unique ability for each eye, but having two of them will always grant the use of the Susanoo.
Examples
- Danbooru post #7419610: Sasuke's Mangekyou Sharingan
- Danbooru post #5837404: Itachi's Mangekyou Sharingan
See also
This tag implicates sharingan (learn more).