Night fell.
Inside his room at the Butterfly Mansion, Yamada sat cross-legged on the tatami, his eyes tightly shut.
The doors and windows were locked, there was no one around to disturb him.
'System, open the panel.' He thought silently in his mind.
A deep blue virtual screen instantly appeared before him. The bottom row clearly showed his current assets.
[Dimension Points: 51,990]
Since transmigrating, by changing the Hand Demon's plot, saving the protagonist group, slaughtering Mount Fujikasane, winning over the Hashira, and the series of setups that included letting Akaza go at the Mugen Train a few days ago, he had finally accumulated points to a very significant number.
Fifty thousand points.
This was the threshold to upgrade the Sasuke template from the 'Mangekyo Sharingan period' to the 'Eternal Mangekyo Sharingan period.'
The Mangekyo Sharingan was certainly powerful. Whether it was the black flames of Amaterasu, the shape transformation of Kagutsuchi, or the absolute defense of Susanoo, all were basically unstoppable in this world.
But it had one fatal flaw—vision loss.
Every use of the Mangekyo's ocular techniques caused irreversible damage to the optic nerve, accompanied by a piercing pain that reached the marrow of the bones.
Frequent use of Susanoo would place an even greater burden on the body, eventually leading to blindness.
In this world full of unknown dangers, where he might even have to cross into other dimensions in the future, eyes that could go blind at any moment were clearly a massive time bomb.
And the Eternal Mangekyo was the key to completely breaking these shackles.
'System, consume 50,000 dimension points to upgrade the current template to the Eternal Mangekyo Sharingan period.' Yamada gave the command without any hesitation.
[Ding! Command confirmed.]
[Deducting Dimension Points: 50,000]
[Template upgrade initiated—Target: Sasuke (Eternal Mangekyo Sharingan period)]
As the cold mechanical voice sounded in his mind, an unprecedentedly massive surge of energy descended from the void, pouring directly into Yamada's body.
"Ugh!"
Yamada let out a low, muffled groan, his hands suddenly gripping the tatami mat beneath him.
This power was different from any previous enhancement. It didn't act on his muscles or bones, but went straight for his brain and eyes.
A cold, deep, and massive surge of Yin Chakra, seemingly from the abyss, exploded within his optic nerves.
Indescribable agony instantly swept through his eyes, as if thousands of red-hot needles were frantically piercing and restructuring the inside of his eyeballs.
That was the inevitable transformation process that ocular power undergoes when breaking genetic chains and achieving a qualitative change.
In the original Naruto series, this was a fusion that required transplanting a brother's eyes. Here, the system used the purest high-level energy to forcibly bypass that step for him.
Sweat instantly soaked Yamada's back. He gritted his teeth, not making a single sound.
This pain lasted for a full five minutes before slowly receding like a low tide. In its place was a stream of energy as cool and comfortable as a clear spring, establishing a perfect cycle between his eyes and brain.
The slight fatigue and stinging pain that had remained deep in his brain from activating Susanoo before were completely swept away at this moment.
"Phew..."
Yamada exhaled a long breath of turbid air and slowly opened his eyes.
In the dark room, two glows of crimson suddenly lit up. The pattern of these eyes had undergone an earth-shaking change.
Now, in the center of the pupil, the three sharp angles of the hexagram were elongated by extremely sharp straight lines, and three interconnected tomoe patterns were perfectly embedded inside the hexagram.
The perfect fusion of the Straight Tomoe Sharingan and the hexagram.
Eternal Mangekyo Sharingan!
Yamada raised his hand, quietly gazing at his palm. His vision was clearer than ever before. Even the tiny dust motes floating in the air and the faint airflow in the corridor outside the door were as clear as day under the gaze of these eyes.
What shocked him even more was the surging Chakra within his body. The qualitative change in ocular power had caused the Chakra in his body to explode exponentially.
If his previous Chakra was a rushing river, then now, his spiritual world had converged into a vast ocean.
'So this is what the Eternal Mangekyo feels like.'
Buzz!
A cluster of pitch-black flames instantly ignited at his fingertips.
The black flames of Amaterasu emitted a terrifying temperature, yet Yamada didn't feel even the slightest bit of eye soreness or pain.
He flipped his wrist, and the black flames, as if alive, changed shape at his fingertips at will, sometimes turning into a sharp blade, sometimes into a long whip—Kagutsuchi.
It moved like an extension of his arm, without any obstruction, and more importantly, without any side-effect backlash.
Not only that, Yamada could clearly feel that the power hidden deep within his pupils had been completely released from its restrictions.
As long as he wished, he could at any time summon that winged, dual-sword-wielding, god-like 'Perfect Susanoo' that could blot out the sky.
In this world where the highest combat power was merely Kibutsuji Muzan, Yamada, possessing the Perfect Susanoo, had reached a peak that could not be surpassed on a physical level.
'Fifty thousand points, well spent.'
Yamada squeezed his fingers, and the black flames at his fingertips were instantly extinguished. The complex patterns in his eyes slowly faded, returning to deep black pupils.
He pushed open the window, and the night wind blew in, bringing the faint fragrance of wisteria flowers.
With his strength having reached a qualitative leap, next, whether Muzan sent an Upper Rank to test him or personally took the field, he had the absolute confidence to consume the opponent entirely, skin and bone.
"The quiet days are about to end."
Yamada looked at the crescent moon in the night sky, a sharp curve hooking at the corner of his lips.
[Dimensional Template System]
[Host: Tanaka Yamada]
[Current Template: Sasuke (Eternal Mangekyo Sharingan period)]
[Skills]
Ninjutsu: Lightning Release, Fire Release...
Dojutsu: Eternal Mangekyo Sharingan (No side effects. Includes ultimate insight, Genjutsu control, Amaterasu, Kagutsuchi, Perfect Susanoo).
Taijutsu: Uchiha Style Genjutsu, Sharingan Taijutsu.
[Items Held: Kusanagi Sword: Modified, Wisteria Sachet]
[Dimension Points: 1,990]