Eternal Mangekyou Sharingan

Eternal Mangekyou Sharingan is a powerful doujutsu' obtained by having the Mangekyou Sharingan' and killing another Mangekyou Sharingan user.

Benefits

 * No limit of how many Mangekyou Jutsus the user can use per day.
 * Mangekyou Jutsus don't do damage to the own user anymore.
 * The vision lost from using Mangekyou Jutsus is recovered.

Evolution
The Eternal Mangekyou Sharingan can evolve to the Rinnegan if the user has both Uchiha and Senju DNA.