A few hours later, Uchiha Fugaku entered the room with the operating table.
He had Subject One sit up from the table and then began unwrapping the bandages from Subject One's eyes. Once the bandages were off, Subject One opened his eyes. They looked no different than before, with clear, black pupils. However, these were no longer Subject One's original eyes but a pair of Three-Tomoe Sharingan.
"Activate the Sharingan!" Uchiha Fugaku commanded. Subject One complied, and immediately, his eyes turned crimson, with three tomoe (comma-like shapes) appearing in each. A strange, chilling aura emanated from him. From his demeanor and appearance alone, Subject One now looked indistinguishable from any Uchiha clan member who had awakened their Sharingan.
"Deactivate the Sharingan," Uchiha Fugaku ordered again. The crimson color in Subject One's eyes vanished, and the three black tomoe disappeared. His eyes returned to their previous clear, pristine state, his black pupils like two precious gems.
"Excellent," Uchiha Fugaku nodded, satisfied. Subject One didn't suffer from the same inability to deactivate his Sharingan as Kakashi did; he could freely activate and deactivate it. This meant the transplanted Sharingan wouldn't constantly drain Subject One's chakra or become a burden. Just as he predicted, Subject One had perfectly integrated with the implanted Sharingan, with no signs of rejection or adverse side effects. Of course, this was also thanks to Uchiha Aya's high level of medical ninjutsu. If a less skilled medical ninja had performed the transplant, even if it were successful, the integration likely wouldn't have been completed so quickly.
"The Hashirama cells and Hashirama cell transplantation technique obtained from Orochimaru... I can have Uchiha Aya experiment with them to confirm if the transplantation technique is genuine."
With that thought, Uchiha Fugaku looked at Subject One expectantly. "Now, to confirm his combat power!"
The reason for transplanting a pair of Three-Tomoe Sharingan into Subject One was to enhance his strength and see if he could reach the Elite Jonin level. If his power couldn't be elevated to that level, then while the eye transplant was successful, it wouldn't hold much practical significance.
"Realistic Genjutsu—"
Activating his Mangekyo Sharingan, Uchiha Fugaku used his Realistic Genjutsu, pulling Subject One once again into a seemingly real, yet ultimately illusory, space.
"Attack me with full force!" Uchiha Fugaku instructed, and Subject One immediately launched an assault.
"Demonic Illusion: Shackling Stakes Technique—"
Subject One's Sharingan appeared, the three tomoe within them spinning rapidly as he cast a genjutsu on Uchiha Fugaku. Though he had just acquired the Sharingan, his familiarity with Uchiha Fugaku's combat memories meant he used it with surprising proficiency, not clumsiness.
Thud, thud, thud!
One massive metal stake after another descended from above, piercing Uchiha Fugaku's body. This immobilized him and inflicted intense pain.
Buzz—
Uchiha Fugaku's Mangekyo Sharingan spun, increasing his ocular power output, and he easily broke free from the Demonic Illusion: Shackling Stakes Technique. After all, it was merely a genjutsu cast by a Three-Tomoe Sharingan, naturally insufficient against Uchiha Fugaku's Mangekyo Sharingan.
Whoosh—
Breaking free, Uchiha Fugaku saw Subject One had already lunged close to him. His leg moved like a whip, kicking towards him.
Snap—
Uchiha Fugaku raised his hand to block, deflecting Subject One's kick. But Subject One's other leg bent and sharply stomped the ground, launching his body into the air and kicking at Uchiha Fugaku with his remaining leg.
Snap—
Uchiha Fugaku extended his other hand, blocking Subject One's second kick. Subject One, still airborne, used Uchiha Fugaku's hands to propel himself. He distanced himself from Uchiha Fugaku and landed steadily. Even before landing, while still in the air, he had rapidly formed hand seals. As he touched down, the hand seals were complete.
"Fire Style: Great Dragon Fire Technique—"
A massive fire dragon opened its fiery maw, like a burning train hurtling towards Uchiha Fugaku.
"Ice Style: Ice Gate—"
A colossal gate of ice materialized before Uchiha Fugaku, blocking the incoming fire dragon. The fire dragon crashed against the massive ice gate, only causing a slight melting on its surface.
Whoosh—
Uchiha Fugaku's body seemed to merge with water, passing through the ice gate and reappearing on the other side, pouncing towards Subject One.
Whiz, whiz, whiz!
Subject One simultaneously flung both hands, unleashing numerous shuriken. They collided in mid-air, changing direction, and assailed Uchiha Fugaku from all angles.
Clang, clang, clang!
Under the visual prowess of the Sharingan, the trajectories of the incoming shuriken were crystal clear. Uchiha Fugaku pulled out a kunai and swiftly swung it multiple times, expertly deflecting the barrage of shuriken. As he ran, he formed hand seals with one hand.
"Ice Style: Ice Prison Technique—"
Ice spread from the ground, extending towards Subject One, who was attempting to retreat and create distance. In a very short time, Subject One was frozen within a massive cubic block of ice, utterly immobilized. The battle concluded there.
Disabling the Realistic Genjutsu, Uchiha Fugaku and Subject One returned to the outside world.
"The Sharingan has not only granted Subject One powerful genjutsu, but it has also enhanced his taijutsu, weapon handling, and timing of ninjutsu releases!"
Uchiha Fugaku was very satisfied with the test results. The Three-Tomoe Sharingan transplant had improved Subject One in many aspects, leading to a qualitative change in his overall strength. It was as if he had been completely reborn. This was normal; the Uchiha clan's Sharingan was indeed that powerful. Possessing it made a huge difference in one's strength. This was also why many ninjas in the world coveted the Uchiha clan's Sharingan. If it weren't for the fact that not everyone could perfectly transplant a Sharingan, with most experiencing severe side effects, the Uchiha clan's Sharingan would be even more highly sought after.
"He has absolutely reached Elite Jonin level!"
By now, he was almost certain that Subject One's strength had significantly increased, escalating from Jonin to Elite Jonin. He was no weaker than the clan's elite Jonin like Uchiha Min and Uchiha Hoshi; only Uchiha Yakumi could surpass Subject One. Uchiha Yakumi's strength, however, already exceeded that of an average Elite Jonin, approaching Kage-level. If there were an additional rank between Elite Jonin and Kage-level, such as "Quasi-Kage," then Uchiha Yakumi's strength would be classified as Quasi-Kage.