Konoha Research Institute.
The floor, covered in runes, glowed faintly.
At the center of the ritual circle lay a person who had already lost all signs of life.
Tobirama stared at his failed experiment once again, his brows tightly furrowed.
What he had just attempted was a soul transfer experiment, but the greatest obstacle remained — the soul couldn't stay within the new body for long.
If it exceeded that limit, it would be forcibly torn from the body and could no longer return to its original vessel.
How exactly did Orochimaru solve this problem...?
Despite the numerous successful cases Orochimaru had left behind in the research institute, Tobirama still couldn't arrive at a definitive conclusion.
He had tried creating a secret technique that could bind the soul, and he had succeeded.
However, the result was disastrous: when the test subjects remained in the new body for too long, their souls grew agitated, uncontrollable, and wracked with unending pain.
They would gradually lose their sanity and eventually perish.
The test subjects endured immense suffering.
Tobirama felt as though he had fallen into a trap, endlessly circling within a dead end without finding a way out.
He had considered that his theory might be flawed, contemplating the possibility of scrapping everything and starting anew.
But every time he re-evaluated it, this theory seemed the only viable one.
Utterly at a loss, Tobirama left the research institute and wandered aimlessly through the village.
After calming himself down for quite some time, he reluctantly decided to temporarily abandon his research on souls and shifted his focus to studying the Byakugan.
Several days of seclusion followed, and at long last, he did manage to reach a conclusion.
If the Byakugan can evolve, this evolution wouldn't be biological but rather a transformation in the form of chakra expression.
Otherwise, if a previously evolved form of the Byakugan had existed, it would surely have been passed down genetically, much like the Sharingan of the Uchiha clan.
The Eternal Mangekyo Sharingan, however, cannot be inherited — it can only be obtained through special means.
The same must apply to the Byakugan.
Only by acquiring that unique chakra can one unlock the key to its evolution.
Tobirama shared his findings with Makoto.
Makoto, however, held a skeptical stance.
He distinctly recalled that in the original storyline, the creation of the Tenseigan required a large number of Byakugan eyes.
If that special chakra referred to the chakra of the Otsutsuki clan, then theoretically, the branch of the Otsutsuki with purer bloodlines on the moon should have been able to attain the Tenseigan effortlessly.
After pondering for a long time, he asked, "Since this so-called ocular power is essentially a manifestation of special chakra affecting the visual nerves, could it be possible to capture this special chakra?"
Tobirama shook his head and said, "How could that be possible? If it were, wouldn't everyone be able to have the Sharingan and Byakugan?"
As Tobirama suggested, if this special chakra could be extracted and implanted into others, would those individuals then be able to obtain the Sharingan or Byakugan?
The conditions for producing this special chakra are still determined by genetic factors.
Special chakra... a large number of Byakugan...
Makoto fell into deep contemplation, and suddenly, his expression shifted sharply.
He thought of a possibility: combining the concepts described in the original storyline with Tobirama's findings.
Could it be that extracting and gathering a large amount of this special chakra would result in the creation of the Tenseigan?
However, the method for extracting this chakra seemed to be something only the Otsutsuki on the moon possessed.
"It's possible. It must be possible," Makoto muttered to himself.
"What did you say?" Tobirama couldn't help but ask.
Makoto responded, "I'm saying there must be a way to crack the genetic code and extract this special chakra imprinted in DNA!"
Tobirama thought Makoto was being far too fanciful.
Why were ninja with Kekkei Genkai so valuable in the ninja world?
If what Makoto said was true, then Konoha could potentially have an endless supply of ninja with Kekkei Genkai.
Techniques like the Sharingan, Byakugan, and Wood Release could be universally reproduce.
Tobirama had previously attempted research on the Sharingan but found it completely infeasible with current technology.
Makoto, needing to organize his thoughts, decided not to continue the discussion.
Tobirama then took the initiative to say, "My soul reincarnation experiment has hit a bottleneck."
Makoto's expression shifted slightly. "The soul can't remain in the new body for long, right?"
Tobirama was stunned. "You know?"
Makoto replied, "Orochimaru encountered the same problem."
Tobirama immediately asked, "How did he solve it?"
After a brief consideration, Makoto said, "Orochimaru's method might have significant drawbacks."
"What do you mean?"
"You should look into the ancient texts left by the Uzumaki clan. They contain extensive records on life, death, souls, and even the Shinigami."
The Uzumaki clan...
Tobirama fell into contemplation.
This was indeed something he had never considered.
Makoto continued, "I guess you've tried methods to bind the soul to the body, but you must have failed. The test subjects likely suffered immense pain before death because the Shinigami forcefully pulled their souls from their bodies. Using soul-binding techniques is essentially subjecting them to a torment worse than being torn limb from limb."
"The cycle of life and death in this world follows strict rules. What you're doing is equivalent to opposing the Shinigami, and how can mere mortals possibly win against a God?"
What he said was somewhat cryptic, leaving Tobirama feeling bewildered.
After Orochimaru's success with his soul reincarnation technique, Makoto had also reviewed the ancient texts of the Uzumaki clan.
"Orochimaru's Living Corpse Reincarnation technique is a way to deceive the Shinigami and achieve immortality."
Tobirama asked, "What kind of method?"
"Soul splitting."
"Each time he undergoes soul reincarnation, he splits off a portion of his soul, offering a small part of himself to the Shinigami as a substitute for his death. This makes his soul increasingly frail, an irreparable wound."
This also explained why the Reaper Death Seal was able to seal Orochimaru's arms in the original story.
Tobirama was shaken to the core by this revelation.
Such a concept was astonishingly audacious.
Orochimaru was both a genius and a madman!
"After the soul is split, the portion remaining in the original body is taken by the Shinigami to the Pure Land, while the part that escapes will no longer be under the Shinigami's watch."
"The successful soul reincarnation experiments in the research institute—every one of them has incomplete souls. They're all fragmented. If you had known them before, you'd notice that many of them have undergone drastic personality changes because parts of their previous selves were cut away along with their souls."
Tobirama pondered for a long time before asking, "Is the method you mentioned earlier for true resurrection this one?"
Splitting oneself — would the split version still be oneself?
As Makoto had said, the test subjects in the research institute all had fragmented souls, their personalities drastically different from before.
If he accepted splitting his own soul, would the resurrected version of himself be different from who he was now?
Which part of himself would be discarded...?
However, Makoto shook his head at this moment and denied it, "No, it's not."
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