"Combine the three Sage Modes of Shikkotsu Forest, Mount Myoboku, and Ryuchi Cave, and construct a unique Sage Mode suited to your own physique!"
With the continuous consumption of massive amounts of ocular power, the techniques, natural energy ratios, and amplification capabilities of the three Sage Modes that Uchiha Shin had mastered began to be reconstructed and merged.
This was not a blind fusion. Uchiha Shin was fully aware of the strengths and weaknesses of each Sage Mode. What he needed to do now was to refine the best aspects, eliminate the limitations, and create something unparalleled.
A dark eyeshadow-like mask naturally formed around his eyes, while a vast amount of natural energy was forcefully drawn from the surroundings, flooding into his body.
This was no longer harmonious absorption—it was outright plunder.
Uchiha Shin resembled a Divine Tree planted by the Otsutsuki Clan, siphoning the very life force and essence of the world itself.
His chakra was no longer just an ordinary fusion of natural energy to form Senjutsu Chakra.
Instead, his body absorbed natural energy as if it were fuel—directly refining it into pure chakra and even nourishing his very cells.
The sage markings on his face slowly faded, replaced by an intricate dragon-shaped tattoo slithering across his skin.
Finally, the tattoo settled on his back, forming the image of a dragon raising its head toward the heavens, its jaws open wide as if it were about to devour the world.
At that moment, Uchiha Shin opened his eyes.
His irises, still golden like before, now carried a deeper, more primal glow—no longer merely borrowed power, but something intrinsic, something natural.
He clenched his fists, feeling the overwhelming strength surging through his body.
"It worked... but my left eye is almost blind."
Uchiha Shin frowned slightly as his vision blurred in his left eye, the strain of the transformation having taken its toll.
Yet, he did not panic. His new Sage Mode was constantly absorbing natural energy, steadily converting it back into ocular power to restore what was lost.
And this Sage Mode was vastly superior to the three he had mastered before.
The first major breakthrough was that he could now enter Sage Mode instantly, just like Hashirama Senju, or even maintain it indefinitely.
The dragon tattoo on his back acted as a conduit, continuously drawing in natural energy and integrating it into his chakra network.
However, the absorption efficiency was lower than when he actively entered Sage Mode. In this state, it was like being in a half-awakened mode—constantly taking in nature's energy, but at a manageable pace.
Over time, this would lead to a gradual refinement of his chakra until his entire system was fully transformed into Sage Chakra.
His physical body, too, would evolve—his cells becoming more resilient, his natural lifespan extending beyond ordinary human limits.
The reason why the Great Slug Sage, the White Snake Sage, and the Toad Sage could live for centuries, or even millennia, was because their existence had almost merged with natural energy itself.
"If I continue this long enough… I might reach their level."
At the very least, surpassing a thousand years of life was no longer a mere fantasy.
The second major breakthrough was that this newly reconstructed Sage Mode retained the advantages of all three traditional styles.
His enhancements now covered ninjutsu, taijutsu, genjutsu, and even ocular techniques across the board. The balance of power had shifted in his favor.
Using Yin-Yang Release in this state would be far easier, more natural.
Moreover, his regenerative abilities and chakra recovery rate now exceeded those of Shikkotsu Forest's Sage Mode by a significant margin.
Still, Uchiha Shin wasn't about to start lopping off his limbs to test his healing factor, so for now, he could only speculate about its full extent.
One thing was certain—his body no longer required sustenance the way it once did. The dragon tattoo's passive absorption of natural energy was sufficient to meet all of his nutritional needs.
"I see… so I don't even need to eat anymore."
He mused aloud before deactivating Sage Mode.
Even now, he could maintain this form for over an hour without strain. And as his body continued to adapt, that duration would only increase.
Eventually, if his transformation reached its peak—if his body learned to generate natural energy on its own—Sage Mode would become his default state, his natural existence.
Raising his hand, he summoned his chakra, watching as a Rasengan began to form in his palm.
The normally vibrant blue sphere now carried a faint golden hue.
"My chakra… has changed."
He could sense it clearly. Something within his chakra had evolved, refined beyond its previous state.
And it reminded him of the Otsutsuki Clan.
The Otsutsuki had an ability known as [Karma], a method of encoding their very existence into others, like a compressed file slowly unpacking within a new vessel until resurrection was complete.
The Six Paths Sage and his two sons, Asura and Indra, had also passed on their chakra through reincarnation—though unlike the Otsutsuki, their process lacked the ability to fully preserve soul information.
Uchiha Shin pondered over this, his mind drifting toward a shocking realization.
"Could it be… that my chakra is now recording the information of natural energy itself… gradually evolving?"
The Otsutsuki's Karma was too distant a concept for him to analyze directly, but there was something much closer to home.
Jugo.
The very source of Orochimaru's Curse Mark. A man born with the ability to naturally absorb and regulate nature's energy, albeit imperfectly.
Jugo possessed two notable techniques.
[Cellular Expulsion], which allowed him to transfer his own chakra-infused cells into another's body to heal wounds—so long as the recipient was compatible with the Curse Mark's energy.
And [Cellular Assimilation], which allowed him to absorb the flesh and cells of others, integrating them into his own body for rapid regeneration.
"To give another person your own cells without rejection… you'd need to rewrite the genetic structure of those cells to make them compatible."
"And to absorb someone else's cells into your own body, you'd need to reprogram their genetic makeup to match yours."
"Chakra serves as the medium for this transformation—overwriting and merging genetic factors on a fundamental level."
His mind flickered to the Fourth Shinobi World War, when transplanted Sharingan eyes had functioned like plug-and-play devices.
It was the same principle. Upon transplantation, the user infused their own chakra into the eye, forcing it to conform to their genetic structure.
A bold idea surfaced in Uchiha Shin's mind.
If chakra was fundamentally an extension of the body and soul…
Then it must already contain genetic and spiritual information.
So what if he deliberately encoded someone else's genetic data within his own chakra?
Could he directly acquire their bloodline abilities and physique?
A sudden realization struck him like a thunderclap.
"My right eye's Mangekyou ability—[Soul Sacrifice]—it's already doing this, just at a crude level!"
His mind raced back to the beginning.
Every time he had absorbed another ninja's chakra and vitality, he had inherited new chakra properties.
When he had drained the life force of an Uzumaki, he had awakened the Uzumaki Clan's legendary vitality and chakra reserves.
Uchiha Shin exhaled slowly.
He hadn't expected that, by simply following his instincts, he had already begun to touch upon something terrifying.
A method of evolution far beyond what any shinobi had ever achieved before.p
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Bonus Chapter - 150 Power Stones