Unexpected Joy, Mangekyo Sharingan... Ten-Tails Cells? God Tree Seed?

The plan to awaken the Mangekyo Sharingan had barely begun before it ended in failure.

Beyond allowing Ensei Uchiha to experience a fleeting sense of rage, nothing happened.

As for the trace amount of special Chakra extracted from the brain of Itachi Uchiha, it failed to produce any effect whatsoever.

Whether it was because the quantity was too small, or because the specific type of special Chakra required varies from person to person, the attempt was entirely fruitless.

Since it had failed, Ensei Uchiha simply waited for the Izanagi triggered by the Transcription Seal to take effect, altering the reality that had already transpired.

Izanagi and the Transcription Seal are truly the ultimate combination.

The only drawback is that Izanagi cannot change a future that has already occurred; it can only rewrite the time following its activation.

Oh, right. It is also possible that the failure to awaken the Mangekyo was precisely because Izanagi was used.

After all, theoretically speaking, the time following the use of Izanagi can be considered a genjutsu cast upon the world itself.

Even if one uses Izanagi, does a Three Tomoe Sharingan truly possess the qualifications to challenge the Mangekyo?

Regardless, although the Mangekyo Sharingan experiment failed, Ensei Uchiha did not abandon his quest to increase his strength; instead, he prepared an alternative.

That's right: the Tenseigan.

Previously, after cloning one hundred thousand Byakugan, Ensei Uchiha had intended to temporarily replace his own eyes.

However, after discovering that he could tap into the ocular power of the Byakugan by sealing them within his body like a Jinchuriki, he abandoned that idea.

Eyes are best in their original state; if one can avoid replacing them, it is best to do so.

There was another reason: the purity of those one hundred thousand cloned Byakugan was likely insufficient.

Now, having realized the limitations of his own power, Ensei Uchiha began preparing to resume the replication of the Tenseigan.

First was cloning the eyes of Hinata. As one of the only two sources in the original work with sufficient purity, Ensei Uchiha monitored the cloning process closely.

Yet, after they were cloned, Ensei Uchiha still could not discern any difference between these eyes and the other Byakugan.

Consequently, Ensei Uchiha began his backup plan: autonomously refining the purity of the Byakugan.

How to go about it? Naturally, everything had to be left to the omnipotent Chakra.

However, there was a problem with this approach: how does one confirm that a Byakugan is pure? What constitutes an impurity, and what is the true power belonging to the Byakugan?

Ensei Uchiha naturally did not know, but he could use a brute-force method: utilizing the Chakra extracted from the one hundred thousand Byakugan within his body to refine the cloned ones.

As for what exactly was being refined out, Ensei Uchiha could not distinguish it; he could only increase the experimental sample size to improve the success rate.

To this end, Ensei Uchiha cloned one hundred pairs of Hinata's eyes and began the frantic process of refinement experiments.

One month later, only six pairs of Byakugan remained. Among these six, only two maintained the state of a Byakugan, while the others had undergone unknown mutations.

Setting aside the mutated eyes, Ensei Uchiha could already sense something different about the remaining two pairs compared to the others.

Whether they met the purity requirements, however, would still require specific experimental verification.

Originally, Ensei Uchiha had intended to replace his own eyes.

But during this period, Ensei Uchiha discovered that the fragment of the God Tree he had acquired had undergone an unknown mutation under the influence of his Chakra and Natural Energy.

To describe it specifically, it looked like the flesh of a White Zetsu, but not quite as white?

No, unlike the lifeless appearance of a White Zetsu, this white substance was more akin to the skin color of the Otsutsuki Clan.

"Could it be that this thing can cultivate a Ten-Tails?"

"I recall that what Kaguya Otsutsuki brought to the Shinobi World was a God Tree seed. Since it is a tree, it should be able to bear seeds, right?"

Ensei Uchiha stared at the thing he had created, lost in thought. Ten-Tails cells? A God Tree seed? Was it a trap, or an opportunity?

Immediately, Ensei Uchiha paused his Tenseigan replication project and began to study this mass of white matter.

After more than a month of research, Ensei Uchiha discovered that this thing truly seemed to originate from some special existence of the Otsutsuki Clan.

It could absorb various types of Chakra or Natural Energy to grow, and upon reaching a certain stage, it could even provide feedback.

This characteristic was very similar to the original Ten-Tails.

Thus, Ensei Uchiha named it the Mini Ten-Tails and began a detailed study.

Ultimately, through this ability of feedback, Ensei Uchiha successfully obtained two Mangekyo Sharingan.

As for why it was two individual eyes rather than a pair, it was because Ensei Uchiha only possessed the flesh of three types of Mangekyo Sharingan: the Kamui from Kakashi Hatake and the Kotoamatsukami from Shisui Uchiha.

As for the ocular technique of Itachi Uchiha... although it was powerful, its practicality was not entirely satisfactory, so it was abandoned.

Upon obtaining the two Mangekyo Sharingan, Ensei Uchiha's supply to the Mini Ten-Tails reached a certain limit.

At this moment, the Mini Ten-Tails had grown to over three meters in height. Aside from the Byakugan ocular power within Ensei Uchiha's body, only Natural Energy could satisfy its growth requirements.

Furthermore, perhaps because he had fed it too much of his own Chakra, Ensei Uchiha could now perceive the state and abilities of the Mini Ten-Tails itself.

Its state was nothing special; it remained in a constant state of growth, requiring more energy with each passing day.

As for its abilities, the Mini Ten-Tails originated from the Demonic Statue of the Outer Path, inheriting a portion of the Ten-Tails' ability to absorb Natural Energy and provide feedback.

But perhaps due to the lack of Chakra from the nine Tailed Beasts, the Mini Ten-Tails would not produce a Chakra Fruit during its feedback process; instead, it would release a special type of Chakra that caused objects in its proximity to evolve.

Once Ensei Uchiha was able to sense the presence of the Mini Ten-Tails, the release of this evolutionary power could already be controlled to a certain extent.

The Mangekyo Sharingan in Ensei Uchiha's hands had come about in exactly this way.

At the beginning, what Ensei Uchiha had cloned using that flesh and blood were merely the most basic Single Tomoe Sharingan.

Having already obtained the Mangekyo Sharingan, logically speaking, Ensei Uchiha had achieved his initial plan and could have chosen to return.

But looking at the Mini Ten-Tails before him, a surge of impulse welled up in Ensei Uchiha's heart; if the plan succeeded, he would possess talent or abilities comparable to the Otsutsuki Clan.

If it failed, at worst, he would simply discard this physical body of his.

After a long period of consideration, Ensei Uchiha still decided to take the gamble.

But before gambling, Ensei Uchiha had to select a clone to serve as the body he would use while his main body was in the evolutionary period.

And at this moment, the Tenseigan Cloning Project, which had been shelved all this time, could finally proceed.

Selecting one pair from those two special Byakugan to serve as the vessel for the Tenseigan, Ensei Uchiha began extracting his own cells and, after fusing them with a portion of Hyuga Clan cells, cloned a new physical body.

Immediately following this, he inserted the Byakugan, cast the Spirit Transformation Technique, and entered the new body...