You returned to the Floating Island.
The Wood Style clones you'd stationed here earlier had already completed its construction, along with rebuilding the sealing techniques and barriers.
Even the Tailed Beasts you nearly drained dry before had recovered somewhat, thanks to the Wood Style clones infusing them with chakra through a barrier that allowed chakra communication.
Though they hadn't returned to their original states, at least they had regained distinct forms—no longer just formless cores of chakra.
You dispelled the Wood Style clones and placed the newly acquired chakra from the Four-Tails and Five-Tails into the Floating Island.
Thanks to your connection with Jashin, your understanding of sealing techniques had rapidly deepened, bursting with ideas waiting to be realized. Coupled with your initial mastery of divine rule-based power, you quickly designed an entirely new sealing technique—
A seal capable of containing ten chakra entities.
It was modeled after the Divine Tree's method of drawing energy from the earth veins!
By placing the nine Tailed Beasts into designated positions and having your true body—or a Wood Style clone—enter the sealing core, the seal could facilitate chakra circulation between all entities, forming an interconnected system capable of rapidly drawing in external energy.
In this state, the Tailed Beasts could quickly absorb natural energy and recover at least half of their full strength.
Additionally, the seal could convert large quantities of incoming enemy Ninjutsu into energy to be devoured.
Essentially, it was a bootleg version of the Rinnegan, constructed entirely from sealing techniques.
It could even rapidly siphon chakra from enemies caught within its array!
You named it the Tailed Beast Absorption Array and designated it as a testing ground to evaluate Ninjutsu power.
After setting the Tailed Beasts in place and reinforcing the Floating Island...
You entered seclusion to cultivate the Fission Technique.
With the divine bloodline of the Ōtsutsuki—revered as a godlike clan—your talent and comprehension had long transcended the limits of ordinary shinobi.
Add in the six-tomoe Sharingan and Byakugan, plus the Void Rule's analytical capabilities—
Once you grasped the fundamentals, you instantly understood the core of the Fission Technique.
In simple terms, this Jutsu could divide the cells in your body into two equal parts—like Shadow Clones—and then restructure them into two physical forms.
Both bodies were your true self. They shared thoughts, could act simultaneously, and were perfectly synchronized.
It was somewhat similar to Nagato controlling the Six Paths of Pain.
However, the technique demanded an exceptionally strong soul—or rather, immense Spirit—to wield effectively.
Fortunately, you were born of the Uchiha, now reborn in an Ōtsutsuki body, and had long practiced the Spirit Transformation Technique. Your Spirit far exceeded the threshold required.
Although on the surface, the Fission Technique seemed like a throwaway skill—good only for avoiding death, at the cost of power and preventing large-scale Ninjutsu usage—
And seemingly less practical than the Shadow Clone Technique—
It had one irreplaceable advantage: both divided forms were true bodies, perfectly connected in mind and soul!
This changed everything.
After mastering the enhanced versions of the technique modified by Orochimaru, Amado, and Shinnō—
You learned to intentionally not divide your Sharingan.
You could now produce a body without a Sharingan, perfect for transplanting a Mangekyō Sharingan.
Combined with the Ocular Power Fusion Technique obtained from the Hyūga Clan...
You now had the opportunity to preserve the Mangekyō's ocular abilities during the Eternal Mangekyō fusion process!!!
This was the true brilliance of the Fission Technique—
Not for combat, but for raising the upper limits of your power!
Perhaps it should be called the Fusion Technique instead.
Thanks to your previous preparations and your unparalleled perception, it didn't take long for you to not only fully master the Fission Technique and internalize it...
You also selectively integrated the improved methods from those three and mastered the Body Activation Jutsu.
Using your own insights...
You soon created a split body containing half the Ōtsutsuki bloodline concentration of your original self—one that lacked eyes.
However, you soon noticed: upon creating this body, your own bloodline concentration dropped by half.
Even using the Body Activation Jutsu to regenerate both bodies' cells to normal levels did not restore the original bloodline concentration. It remained halved.
Only by fusing the two bodies back together could the bloodline concentration return to its original state.
From this, you drew a conclusion:
Bloodline concentration doesn't increase just by cell proliferation—
Nor does it vanish due to simple cell reduction. It must have transferred somewhere else!
In other words:
Unless externally fused with another source, or passively lost, a person's bloodline remains a constant—no matter how their physical form changes.
You named this principle the Law of Bloodline Conservation!
And it made perfect sense.
Even the Ōtsutsuki, when using Karma for reincarnation, must choose vessels with high enough bloodline concentration—and ensure their own backup bloodline is stored away.
This was evident with Boruto and Momoshiki. After Boruto suffered a fatal injury, Momoshiki used his own bloodline backup to keep him alive—losing his chance to resurrect as a full Ōtsutsuki in the process.
If that weren't the case, why would the Ōtsutsuki race go planet-hopping across the universe, planting Divine Trees to extract life force?
Wouldn't it be easier to just stay home and go through an endless cycle of sacrifice, rebirth, sacrifice, rebirth...?
Endless Divine Tree fruits—wouldn't that be the dream?
...
To avoid interference during fusion and maintain maximum combat potential...
You made a calculated decision to split off a body with bloodline concentration equal to that of two Uchiha Itachis.
Why this amount?
Because your base body already had the highest Uchiha bloodline content. Splitting off that much wouldn't noticeably impact your strength.
And it ensured the fusion process had a high success rate!
You summoned Boss Black Cat, giving his fluffy fur a long-overdue pat, then began sorting through your collection of Mangekyō Sharingan:
Four Kamui eyes—three left, one right—acquired from Kakashi and Obito across multiple simulations;
Two Amaterasu, two Tsukuyomi—harvested from Uchiha Itachi;
Three Kotoamatsukami—two from Danzo, one dug out from Itachi's summoned crow;
A pair of Mangekyō eyes with the ability to convert mental trauma into physical damage—originating from Fugaku, the Uchiha Clan's utterly useless former patriarch;
Lastly, one gifted by Uchiha Setsuna, imbued with the power to seal time itself...
In total, fourteen Mangekyō Sharingan.
Half of them came from Itachi and his father.
In hindsight, they were practically your benefactors!
It was just unfortunate you never got your hands on Sasuke's Mangekyō.
You simply didn't have the patience to wait for him to grow up.
After all, not everyone's like you—able to awaken the Mangekyō Sharingan at just a few years old...
Since this was your first fusion attempt, you had no idea how likely it was to preserve the ocular powers—or the exact fusion process.
To eliminate all risk, you decided to choose a few Mangekyō Sharingan as sacrificial fuses:
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Pls Drop some Power Stones
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