The illusory world controlled by Uchiha Yue was not unlike a hyper-advanced virtual realm—akin to Kaguya's Infinite Tsukuyomi dreamscape or the intricate dimensions of Kamui—but far more personal. As its sovereign, Yue could manipulate every law, bend every rule, and perform feats that would defy even the most advanced scientific understanding of the shinobi world.
Unlike generic virtual simulations, which vanish the moment one returns to the real world, Yue's illusionary domain had been shaped through the unique evolution of his Mangekyō Sharingan—a fusion between his reincarnated soul's insights and Uchiha bloodline prowess. Its half-illusory, half-substantial form allowed it to bleed into reality, forming a bridge where imagination could be made manifest, much like how Obito's Kamui could transport physical objects between planes.
And this connection to the real world wasn't theoretical—it was literal. The chakra nature of the Sharingan, especially in its Mangekyō state, enabled eye techniques like Tsukuyomi to alter time perception and Amaterasu to birth unquenchable flames. Yue's own dojutsu took this even further. Once power was gained in his inner world, he could reconstruct it externally—granted the transformation obeyed the laws of nature and the chakra system.
Still, this wasn't a boundless cheat. Were that so, Yue could simply write himself into omnipotence, impose that rewritten self upon reality, and become a god like the Sage of Six Paths. But that would defy the world's inherent balance. For his illusion-forged upgrades to take physical form, Yue had to pay a steep cost in pupil power—pushing the Mangekyō to its limit—and ensure the transformation aligned with the natural order: compatible chakra flows, sustainable cellular structures, and body function rooted in scientific and shinobi biology.
If not, the manifestation would collapse—just as an imperfect jinchūriki risks self-destruction, or a failed Orochimaru experiment turns to dust. This limitation turned his world into more of a hyper-accelerated laboratory—similar to Orochimaru's test facilities, but powered by thought, and vastly more efficient.
As long as Yue had the scientific understanding and real-world data to back up a transformation—whether derived from White Zetsu biology or Hashirama's regenerative pathways—he could simulate and refine it internally, and then bring it to life with no risk of cellular rejection or chakra instability.
But if he was half-prepared—say, lacking full knowledge of Hashirama's cellular memory or Zetsu's origin as victims of Infinite Tsukuyomi twisted by the God Tree—his attempts would fail. The result could be deformities akin to Yamato's imperfect Wood Release, or worse, Danzo's grotesque Sharingan arm—a reminder that even great power misused courts disaster.
Despite these risks, Uchiha Yue's dojutsu was a power of boundless future potential. Where Izanagi could rewrite death by substituting dream for reality, Yue's evolved illusion instead recorded potential futures and pulled them into the present, grounding them in substance.
Izanagi rewrote a moment using the past—Yue's technique rewrote himself using a perfected, simulated future. A key difference that turned a time-stopping illusion into a transmutation of reality.
Time passed, and after rigorously testing the fusion body born from White Zetsu's vegetal cells and his own Uchiha lineage in slowed-down simulations, Yue confirmed its compatibility. Its chakra flowed unimpeded. Its regeneration rate rivaled even Tsunade's Byakugō, without seals. The Wood Release potential lay dormant but stable, and the plant-like vitality coursed through his flesh without resistance.
Then, he acted.
In the physical world, his body flickered into a ghostly haze—just like Danzo's Izanagi flicker before rewriting death—and in its place, from thin air, the new body solidified, sculpted to perfection. It was the same Yue—same blood, same mind—but reconstructed, reborn with enhanced vitality and greater harmony.
It was subtle. No external observer would note much difference. But Yue felt it instantly. His muscles no longer fatigued. His cells replenished chakra naturally. His optic nerves, previously strained by Mangekyō overuse, now held firm, bolstered by the tree-like resilience of Zetsu's cells.
"If this kind of vitality and structure can become my new foundation," Yue murmured, gazing at his now perfectly-calibrated body, "then even if the Mangekyō's side effects aren't fully eliminated, they will be drastically suppressed."
Scarlet light gleamed from his Sharingan, now steadier and more vivid than ever—like a burning promise of evolution, a future born from the illusion.
Because the past is immutable, but the future remains infinitely malleable.
"Hmph! As expected… whether it's pulling external elements into my illusory world, shaping them into reality through spiritual overlay, or directly transforming gains from the illusion into physical matter—the cost is immense!"
Freshly returned from his metaphysical projection, Uchiha Yue couldn't help but grunt. He reached up to cradle his eyes, still glowing faintly with residual Mangekyō light, murmuring with complex emotion.
Yet, despite the tone of complaint, Yue's lips curled upward in a smirk. The swelling vitality in his body was unmistakable, and the cool sensation now soothing his eyes—like the regenerative flow of natural energy—left no room for discontent.
"It appears the fusion with White Zetsu cells has truly mitigated Mangekyō's backlash. Otherwise, with the frequency and intensity of the ocular techniques I used tonight—whether genjutsu augmentation, cellular restructuring, or temporal substitution—there's no way I'd be standing here without experiencing hemorrhaging, migraines, or catastrophic vision loss."
Indeed, even Itachi—who used his Mangekyō conservatively—suffered progressive blindness. And Shisui, despite his fearsome genjutsu mastery, lost an eye after a single confrontation. Yue had pushed his dojutsu harder than either in a single night.
"On top of that," Yue mused as he examined his recovering form, "this Zetsu-derived vitality, merged seamlessly into my Uchiha constitution, is boosting my chakra reserves significantly. With my Mangekyō-tier spiritual force serving as the core, I might soon rival even mid-tier Uzumaki in chakra volume. Not bad at all…"
His previously closed eyes slid open slowly. Incredibly, within moments of rest, the dull ache and blur typical of Mangekyō strain had almost entirely receded. The signs of recovery—even beyond Tsunade's famed regeneration techniques—spoke volumes about the perfected cellular integration.
"Well then," he muttered, his gaze sweeping eastward toward the faraway lights of Konoha Village, "tonight's gains have exceeded all expectations. For now, it's best to retreat, consolidate, and master every facet of this newfound power before planning my next move."
The thought was laced with pragmatism. He knew that raw power without control was dangerous. After all, even Sasuke had trained under Orochimaru and later Taka to adapt to his Mangekyō. And Obito, with his near-immortality, still required years to master Kamui's full potential.
Yue himself had spent years refining his Three Tomoe Sharingan, studying genjutsu layering, perception manipulation, and reaction prediction. That foundation now made his Mangekyō awakening not just explosive—but usable.
Now, within a single night, he had not only unlocked Mangekyō Sharingan but also devoured White Zetsu's body with it—perfectly integrating its vitality into his being, resulting in drastic improvements to his spiritual strength, physical structure, and chakra network.
If he didn't take time to internalize these upgrades, then once the Uchiha Massacre—that night of annihilation—unfolded, he risked a critical misstep. Strength without synergy would only invite disaster.
Moreover, despite its peace-time façade, Konoha was the most fortified village in the ninja world. Even Orochimaru's failed invasion and Pain's assault proved that its depths of power, legacy jutsu, and elite shinobi could not be underestimated.
To stir unrest prematurely—especially in his current, untested condition—would be reckless. Better to return, stabilize, and plan for the true upheaval to come.
Having resolved himself, Uchiha Yue's figure blurred, disappearing into the forest shadows, his path set toward the Uchiha district. Toward home