Sharingan is activated by the release of hormones of grievance due to the loss of loved ones. Sharingan is triggered when one loses their deep love, transmitting specific signals to their brain. This same process follows the development of the second Stage of Sharingan- i.e. Mangekyou Sharingan, meaning Kaleidoscopic eyes. Mangekyou Sharingan is rare to be seen. Not every member of the Uchiha clan could activate the Mangekyou, which means that one should possess the potential to wield those eyes.
The abilities of Mankeyou eyes are on par with those with ordinary Sharingan.
Some known Mangekyou abilities are:
Itachi’s Tsukuyomi- This is one of the most potent abilities of the show we have witnessed. With his left eyes, he uses Mangekyou to destroy the time perception of the enemy, while from the right eyes, he can release the black flames from hell known as ‘Amaterasu.’
Shisui Uchiha’s Koto Amatsukami- Shisui’s Mangekyou was one of the most vital Genjutsu abilities to be seen. Nobody can escape this supreme and absolute Genjutsu trap.
Sasuke Uchiha Mangekyou Sharingan- He has the ability for total flame control.
There are several other Sharingan and other Visual Dojutsu abilities. Visit our site to know more.