"So this is the Mangekyō Sharingan? Eyes like Shisui Uchiha's..." From Nagato's perspective, the visual enhancement and motion-tracking ability provided by his left eye were no stronger than the Rinnegan—if anything, they were somewhat inferior to the Rinnegan in his right socket.
"Can eyes like these really be stronger than the Rinnegan?"
As Nagato familiarized himself with his new left eye, he muttered to himself.
"Did Shisui Uchiha suppress me with eyes like these?"
Now that he possessed a Mangekyō Sharingan himself, Nagato could hardly believe it.
Nagato's disappointment in the Mangekyō Sharingan vanished the moment he sensed the ocular technique dwelling within his left eye.
A trace of disbelief appeared in Nagato's eyes.
"This... is actually such an ocular technique. Its power is even greater than the Rinnegan's ocular techniques..."
After fully understanding the information regarding the ocular technique within his left eye, Nagato sighed.
"No wonder I kept losing to those eyes of yours..."
Nagato had now regained his composure. Both his left Mangekyō Sharingan and right Rinnegan fixed their gaze on Shisui across from him.
At once, Shisui sensed an inexplicable feeling of danger.
As Nagato's gaze grew increasingly dangerous, his new ocular technique had finished gathering power.
"Ocular Technique: Kamui!"
That Sharingan of Nagato's had actually awakened the Mangekyō ocular technique once possessed by Obito Uchiha in his previous life!
In the original plot, Kamui was the unique Mangekyō Sharingan ocular technique of Obito Uchiha. Kamui was an extremely advanced space-time ninjutsu, its essence being the transfer of any object back and forth between reality and another dimension. Because Kakashi had transplanted Obito's left Sharingan, Kakashi could use Kamui as well.
Book of Rin evaluation: "Eyes within the divine domain, transcending causality and the horizon!"
Book of the Sha evaluation: "Another dimension within one's field of