"Should I keep some of his flesh and blood for the Impure World Reincarnation?"
Looking down at Uchiha Shisui's corpse, Uchiha Fugaku briefly considered the idea.
There was no denying Shisui's combat prowess. As a wielder of the Mangekyō Sharingan, his strength surpassed that of an average Kage-level shinobi.
The Impure World Reincarnation was detailed in the Scroll of Seals—if learned, could it be used to revive Shisui as an undead pawn?
After a moment of thought, Fugaku dismissed the idea.
The version of Impure World Reincarnation recorded in the Scroll of Seals was far inferior to Orochimaru's improved version. It might not even be strong enough to revive a Kage-level shinobi like Shisui.
Moreover, Shisui's Kotoamatsukami could allow him to break free from control. Reviving someone with such strong willpower and hostility would be a reckless risk.
Leaving behind any of Shisui's remains was out of the question.
If he eradicated every trace of Shisui, he would prevent anyone—himself included—from ever reviving him through Impure World Reincarnation.
"Corpse Melting Technique—"
A pitch-black vortex formed before him. Fugaku grasped Shisui's body and fed it into the swirling darkness.
As Shisui's body dissolved, a dense, powerful essence emerged—something akin to chakra-infused cells but fundamentally different.
This energy split into two streams, each flowing toward Fugaku's eyes.
A sudden chill spread through his sockets, bringing an unfamiliar yet soothing sensation.
It felt as if a cold, damp cloth had been placed over his eyes on a scorching summer day.
He could feel the change happening.
The evolution of his eyes had begun.
As Shisui's essence continued to nourish his Mangekyō Sharingan, Fugaku's anticipation grew.
This process confirmed his theory—absorbing a powerful Mangekyō Sharingan wielder could enhance his bloodline limit.
But one critical question remained—
Would this be enough to awaken the Eternal Mangekyō Sharingan?
Or would his eyes simply become a stronger version of the standard Mangekyō, retaining their eventual blindness?
As the last remnants of Shisui's essence fused into his optic nerves, he felt it—
A threshold.
A barrier between power and limitation.
If he could break through, his eyes would undergo a qualitative transformation.
If he failed, he would still wield the Mangekyō, but without true permanence.
Fugaku's breath quickened.
This was the moment of truth.
Would his theory prove correct, or had he reached his limit?
Buzz—
Suddenly, his Mangekyō Sharingan pattern spun wildly, beyond his control.
His entire body tensed as an overwhelming force surged through his optic nerves.
He could feel something breaking free.
An unstoppable transformation had begun.
The melting process had ended, but his eyes continued evolving on their own, as though the catalyst had already been set in motion.
Just like a nuclear reaction, once ignited, the process could no longer be halted.
Every imperfection—every flaw that once threatened to consume his vision—was corrected and refined.
His chakra reserves surged, and his eye power expanded far beyond its previous limits.
Time blurred.
Maybe it was half an hour.
Maybe it was an hour or more.
And then—
Everything went still.
His uncontrollable eyes finally settled, returning under his command.
Fugaku's vision sharpened instantly.
The once-dim room now appeared brilliantly clear.
It was as though darkness no longer existed in his sight.
Testing his new visual prowess, he focused on a single point in the room.
Suddenly—
The point expanded rapidly in his vision.
What once seemed smooth now appeared rugged, revealing intricate textures invisible to ordinary eyes.
His sight had become microscopic—so precise that even the smallest particles were visible.
A smirk crossed Fugaku's lips.
"So this is the Eternal Mangekyō Sharingan."
There was no doubt about it.
His eyes had undergone a complete evolution.
Fugaku approached a large mirror and studied his reflection.
To his surprise—his eye pattern remained unchanged.
His Mangekyō Sharingan still bore its original shape:
Three magatama encircling a ring, with three black dots in separate sections.
He had expected the dual-layered transformation seen in Uchiha Madara.
Instead, his situation resembled Indra Ōtsutsuki—the eldest son of the Sage of Six Paths.
Indra had awakened the Eternal Mangekyō directly, without a double-pattern shift.
Fugaku's evolution had followed the same path.
"It doesn't matter if my Eternal Mangekyō lacks a second pattern. The real power lies in the transformation itself."
In fact, this could work to his advantage.
Anyone analyzing his eyes would assume they were standard Mangekyō Sharingan, underestimating him.
Even Uchiha Obito, who was well-versed in Mangekyō abilities, would never suspect he had surpassed the natural limits.
"That miscalculation will cost him dearly."
A dangerous glint flashed in Fugaku's newly empowered Eternal Mangekyō Sharingan.
Now, there was one final question—
Had his dojutsu changed?
He focused inward, examining the powers within his eyes.
First, his left eye's ability—
"Corpse Melting…"
No major changes.
However, the storage capacity had increased, allowing him to process more bodies at once.
"That's within expectations."
Then—his right eye's ability.
"Real Illusion…"
And suddenly—
His breath hitched.
There was a change.
(End of this chapter)