The Eye Power of the Mangekyō Sharingan was limited, unless one obtained the Eternal Mangekyō Sharingan, as Madara Uchiha had.
"What?" While Kagami Uchiha was stunned, Tobirama Senju looked utterly bewildered. He could clearly see that Uchiha Yi's eyes were not the Mangekyō Sharingan, but the ordinary Three-Tomoe Sharingan.
How was that possible?
How could he use Susanoo without the Mangekyō Sharingan?
And Uchiha Yi's Eye Power was plainly greater than Madara Uchiha's had been at his peak.
Tobirama Senju prided himself on understanding the Uchiha Clan, but Uchiha Yi defied everything he knew. All his previous research into the clan might as well have gone up in smoke.
Before long, Tobirama Senju wore the look of a man who had figured it all out.
Uchiha Yi's mental state was clearly far healthier than that of other Uchiha.
He also trusted Hiruzen Sarutobi's and Mito Uzumaki's judgment. Uchiha Yi was undoubtedly a well-adjusted Uchiha, perhaps even more so than Kagami Uchiha.
Could the Mangekyō Sharingan actually be a flawed evolution?
An overwhelming shock could cause an Uchiha to awaken the Mangekyō Sharingan, and afterward, their mental state could suffer terribly.
No Uchiha who awakened the Mangekyō Sharingan was ever ordinary. Some even became threats to the Shinobi World.
Whether the Shinobi World descended into chaos was up to the Uchiha Clan.
Perhaps the Mangekyō Sharingan's flawed evolution was precisely what damaged their minds. For Uchiha Yi, the Three-Tomoe Sharingan was enough.
A well-adjusted Uchiha should be like Uchiha Yi!
Tobirama Senju also had a feeling that Uchiha Yi's Eye Power differed from that of Madara Uchiha and Uchiha Izuna back then. His seemed almost inexhaustible.
His Eye Power was probably like Madara Uchiha's had later become: eternal.
Madara Uchiha's path of evolution was wrong. How fascinating.
Nothing could have pleased