Konohagakure No Sato :
Uzumaki Estate :
The heavy oak doors of the Uzumaki estate clicked shut, sealing out the cool autumn night of Konoha. Naruto moved through the shadows of his garden, his Sandles crunching softly on the gravel. He rubbed his hands together, the friction a grounding sensation against the residual adrenaline of the evening.
(Let's hope Guy can keep Kakashi from fading away,)
Naruto thought, his expression unreadable. He had done what he could. Now, the "Copy Ninja" was someone else's responsibility. He had far more pressing matters to attend to—matters that required absolute solitude.
Naruto moved upstairs with a fluid, practiced silence. In his bedroom, the air shimmered as he wove a single hand-sign. A Shadow Clone materialized beside the bed. Naruto closed his eyes, centering his chakra on a specific frequency etched deep into the earth.
*Fwossh*
A flash of yellow light illuminated the room for a microsecond. When it faded, the original Naruto was gone, leaving the clone to settle into the bed to maintain the facade of a sleeping genin.
Naruto reappeared in a world of stone and ink. This was his true sanctuary: an enclosed laboratory buried 100 meters beneath the estate. The room was a perfect 10m3 cube, every inch of its walls painted with dense, overlapping sealing markings. Earth pillars, also etched with protective scripts, acted as both structural support and chakra dampeners.
It was a self-contained ecosystem—a mini-home, an infirmary, and a storehouse of forbidden knowledge.
"Zetsu-proof," Naruto muttered, nodding at the work. He wove another sign.
Ten Shadow Clones erupted into existence. Four immediately took their positions at the cardinal points of the room, their hands blurring through a sequence of seventeen signs. A pitch-black barrier rose along the walls, a "Void Shell" that swallowed light and sound.
At this depth, under this much sealing, he was a ghost. Not even the ground-merging spies of the Akatsuki could peek into this sanctum.
Naruto walked to a corner of the room where his mechanical blade rested against a rack. He reached into the hollow guard, his fingers finding the hidden trigger. A storage scroll tumbled out. With a surge of chakra, he summoned the prize he had been carrying since the Land of Waves: a glass container filled with a glowing preservation liquid.
Submerged in the fluid was a single, scarlet eye. The Mangekyou Sharingan.
The sight of it sent a thrill of cold anticipation through him. He tossed the container to a waiting clone and moved toward the operating table. The clones in the infirmary area were already calibrating the equipment Naruto had "procured" using Hiraishin-assisted raids on black-market medical depots outside the village.
Naruto laid down on the cold metal surface.
"Let's begin the transplant."
Naruto didn't close his eyes. Instead, he initiated the MindHub link. His consciousness fractured with surgical precision, partitioning his mind into distinct, functional sectors:
Partition Alpha: Controlled the primary Medical Ninjutsu flow, maintaining the steady, green glow of chakra in his fingertips.
Partition Beta: Handled the telepathic coordination of the assisting clones, sharing vision and sensory data in real-time to eliminate lag.
Partition Gamma: Acted as a "firewall" for his nervous system, isolating the inevitable pain and the instinctive flinch response.
The Other Thre Partitions all had their roles , Naruto felt nervous , but soon regained his confidence while going through his status .
Medical Shinobi (Jonin): 2/500
Eternal Forge Seal: Lv.2(16/100)
Great Sage : 5 hours 47 Minuttes remaining
"Activate Halo Eye (Lv. 4)," Naruto commanded internally.
Suddenly, his perception expanded. In a five-meter radius, everything became transparent—the density of the air, the microscopic dust on the scalpel, the structural integrity of his own ocular nerves. He shared this god-like vision with his clones, ensuring that eight pairs of hands moved as a single, flawless organism.
"Alright," the Main Body whispered, the green chakra of the Mystical Palm beginning to hum. "Let's begin."
The clones moved in. One held the anesthetic, another positioned the precision forceps, while the Main Body's fingers hovered just millimeters above his own left eye. The room was silent, save for the low, rhythmic hum of the barrier and the steady beating of a heart .
1 Hour Later :
The subterranean silence of the bunker was absolute, broken only by the rhythmic hum of the Electric-lamps. An hour had passed since the first incision.
Naruto sat up on the operating table, his movements precise and devoid of any post-surgical tremors. With the combined precision of high-level Medical Ninjutsu and the stabilizing influence of the Eternal Forge, the procedure had been a flawless success.
He opened his eyes. Through the shared perspective of a Shadow Clone standing at the foot of the bed, he observed the striking asymmetry of his own face. One eye remained the deep, piercing Blue of the Uzumaki; the other was a vivid, bloody crimson, where three black tomoe drifted lazily around a central pupil.
A quick pulse of Diagnosis Jutsu confirmed the biological integration. There was no rejection, no nerve inflammation—only a seamless tether between his chakra pathways and the foreign ocular organ.
Naruto focused, flooding the left socket with a calculated surge of energy. The three tomoe began to spin, accelerating until they bled into one another, morphing into a complex, three-bladed pinwheel. It was a distorted, spiral shuriken that seemed to pull at the very light in the room.
The world shifted.
With his mental faculties enhanced by the Great Sage buff, the volume of data being processed was staggering. He looked at his clones and didn't just see shapes; he saw the architecture of their chakra. The flow, the density, the flickering points of pressure.
"So this is chakra vision," Naruto mused, his voice a low rasp. "No wonder Danzo and Orochimaru are so obsessed with this bloodline."
His analytical mind immediately began to categorize the leap in perception. His baseline Dynamic Vision, already refined to a Level 6, felt sluggish compared to this. If his previous peak of clarity was a polished lens, the Mangekyou was a high-frequency sensor that pushed his capabilities to a Level 8.
By his estimation, a standard three-tomoe eye would fluctuate between Level 5 and 7
( BUt Sharingan also has Insight and Genjutsu skill , and Mangekyou has it's own unique skills ............Eternal and Rinneagan should only be above )
Naruto closed his eyes for a moment, letting the chakra settle, then stood up. It was time for a live-fire test.
*Fwoosh*
With a yellow flash, Naruto bypassed the village's sensory perimeter and reappeared in the heart of a dense forest situated on the border between the Land of Fire and the Land of Waves. He wore black tactical overalls, his face hidden behind a featureless white porcelain mask.
He activated Kaguya's Mind Eye, extending a silent sweep across the terrain. The area was devoid of life—no ANBU patrols, no prying Zetsu eyes. He turned his gaze toward a granite boulder, a massive slab of stone nearly three meters wide. The pinwheel in his left eye spun.
The space centered on the boulder began to twist clockwise, a violent spatial vortex that seemed to wring the reality out of the air. Just as the stone began to vanish into the unseen dimension, Naruto cut the chakra flow.
The result was a grotesque mutilation of physics. The center of the boulder had been erased, leaving behind a perfectly smooth, mirror-like hollow. He could see the trees on the other side through the void where solid rock had once been.
(Not just for teleportation,) Naruto noted, circling the mutilated stone. (Offensively, it is an absolute severing tool. Defensively, I can intercept attacks into that Kamui Dimension . It is total spatial dominance.............Kamui , What a Cheat )
He glanced at his internal status panel, searching for a trace of this new Entry. His shoulders sagged in disappointment.
( So it didn't register in status panel ........What a shame )
The system hadn't indexed the Kamui or the Mangekyou as permanent skills. It was a hardware-bound ability; without the physical eye in the socket, his soul couldn't replicate the technique.
( I really wanted to see , IF I can use Kamui without the eye .........Guess there are no Bugs )
After spending 1 more hour on testing Kamui and it's other functions with the help of great sage . Naruto decided to end the night with a conclusion
( without great sage , it's difficult to aim , even with mangekyou )
*fwoosh*
" Hmm , i still need to master it , to make a space barrier around myself so which I can teleprt to kamui dimension "
Naruto remembered how later in Original series Kakashi made a Kamui barrier around himself to teleport in the Kamui dimension , but for Naruto , that is something not curretly possible , The problem was not chakra though .
( it's just one day and first usage Of the eyes , But overtime with practice it shouldn't be a problem )
Returning to the bunker, Naruto sat at his desk and opened a fresh research scroll. While testing the limits of his new perception with the Great Sage's help, He discovered some new things .
First, the experience gain for his visual skills had tripled. His Dynamic Vision Lv6 and Keen Eyes Lv5 , which usually progressed at a snail's pace, were suddenly seeing massive growth.
( but there was hadly any difference with Halo eyes skill though )
But the second discovery was the true breakthrough: the Flying Thunder God.
Flying Thunder God LV2 ( 79/100 )
Progress on the Hiraishin had been crawling for a year. Even with shadow clones.
According to Naruto's estimates , it will reach level 5 , by the shippuden or maybe even before 4th world war , The problem was also other skills that Naruto has in his arsenal and also their prgresss together with Hiraishin.
There once came a time , That Naruto wanted to fully focus on Flying thunder god and not on anything , but Flying thunder god can only teleport , not attack and other skills are needed for offense , That Reason and Other Ninjutus's compatibility with sage arts , was the reason that Naruto simply didn't focus on flying thunder god alone .
But with Kamui, his spatial intuition was now innate. The eye literally saw the coordinates the technique sought to bridge. The experience gain for the Flying Thunder God had spiked to six times its normal rate. In a single hour, he had gained 2 full points of experience.
(In a week, the Hiraishin will hit Level 3,) Naruto wrote, his pen scratching rapidly. (The eye understands the space that the technique seeks to bridge. This will be far more efficient than the original's progress.)
The clock on the wall showed 11:50 PM. The Great Sage buff would soon expire, and he needed to see how the experience gain fluctuated without the system's optimization.
Team 7 had been granted five days of vacation following the success of the Wave mission. which was elevated to A rank mission . now it's just first day ending , since team 7 arrived konoha yesterday evening .
It was a window of opportunity he couldn't afford to waste
He formulated a new, grueling nightly routine. , train until dawn to speed-run his Hiraishin and Kamui mastery, and swap the eyes back before the team gathered.
Naruto considered sending shadow clone to Team 7 or other things , but decided to wait and see first . As a Jinchuriki, he needed to maintain his public image with main body .
( Well , let's find some opportunities to find time to train with Kamui .......otherwise I don't mind doing Eye Transplant every night and Morning .... Sharingan are light Bulbs anyway )
but in these four remaining days of vacation, he would become something else entirely.
With the Mangekyou acting as an accelerator for everything from Taijutsu , Ninjutsu copying to spatial manipulation, the path forward was clear.
( Let's see how fast things will progress with Mangekyou ..........But just with these result , the previous ambush on Kakashi was worth it )
Naruto paused just before closing his scroll and opened it one last time.
"Let's start with genjutsu too," he whispered to the dark.
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