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Within the genjutsu world, Kurama, Naruto and Sasuke's eyes were turning with blood red three tomoe symbol, a sign of being under Sharingan genjutsu.

Shinnosuke's eyes too were turning with the same symbol, this one signifying the caster of said genjutsu.

But a change was happening in this pattern.

It was beginning to collapse into itself.

" Current progress 35% "

* Swirl *

Shin's Sharingan pattern finally collapsed on itself as a new pattern was beginning to take shape within this whirlpool.

* Whurl *

As it spun faster and faster, this new pattern was now assuming form, a pattern very familiar to Shin.

* Swirl *

And with a final swirl, the pattern finally manifested.

" Mangekyou Sharingan unlocked. Pattern matching in progress. "

....

" Pattern found, original pattern of Sasuke Uchiha, pre eternal mangekyou evolution. Prediction was 100% correct. "

Shin gave a small smile, he figured as much he would have that pattern, he was the twin of Sasuke, and pattern was determined by genetics, he knew this tidbit due to Obito's both mangekyou having same pattern.

That could only happen if it was genetic, and now his theory was proven correct.

' I still don't have my mangekyou justu though.. '

But Shin didn't worry, as he knew why, he was currently still in the middle of evolution, his Sharingan wasn't done changing, so he didn't recieve his special jutsus yet, he would get them when everything calmed down.

' Let's see, I still don't feel any pain so that's good, at least I am sure the chakra isn't affecting me directly, only changing me as intended. '

Even though Shin understood how everything worked, he wasn't stupid enough to just start eating flesh of a tailed beast.

He had set up a whole rig to make sure he takes only the intended effect and discards everything unnecessary.

" Current progress 40% "

The blood of kurma was used for his radiation and yang power, it was flowing through his chakra barrier, shown as a chair in the genjutsu world but actually was a seal of purification, easy to copy, Naruto's seal itself had that built in.

' What this is doing, is giving energy for my body to change fundamentally in a given direction, instead of randomly eating flesh and hoping for the best. '

What the gold and silver brothers had done was essentially eat radioactive materials then somehow didn't die but mutate beneficially, and what Shin was doing is using the same radioactive substance's ability to modify DNA.

He was slowly exposing himself to it, in a planned manner the body will start changing in his given direction.

' And the direction will be determined by Ashura and Indra chakra. '

" Current progress 50% "

Nodding his head, Shin was waiting for the 67 to 70 percentage mark, according to his calculations that will be when he will unlock the next phase of his Sharingan.

The Rinnegan.

But even with this, Shin wasn't about to become a stitched together monster like Madara.

Because that was not the core of what Shin was doing.

' I am not adding anyone's DNA to my body at all. This is purely my own body, fundamentally rebuilding itself. '

Shinnosuke's body was still his own, he was just forcing his body to evolve.

The Kurama's blood was the tigger of genetic change, the Indra and Ashura chakra were the given direction of evolution and the chakra provided by Kurama was the energy required for the evolution to happen.

" Current progress 62% "

It was happening.

Both the reminder and his body heating up were reminding Shin that his next phase was about to begin.

" CI, begin scanning, maximum efficiency "

Shin gave an order, he needed to keep this change on camera, he can dedicate a little resource to record this, it will not come from his brain but a pre made chakra seal.

It was hard meshing together with every seal currently present, so he didn't make many of them and was using them sparingly.

" Current progress 66% "

Shinnosuke's eyes were beginning to spin again, the star like mangekyou was spinning while shining bright red.

* Whirl *

Every single being currently in the lab was showing this spinning pattern in their eyes, projected from the source, Shin.

* Whirl *

But this was taking time, much longer than it would usually take for a percentage to rise.

' The Rinnegan is really hard to awaken, even after all this preparation, I can see why Madara took so long. '

Shin just rested, he will get it soon enough.

" Current progress 67% "

His eyes were slowly taking on a purplish hue. But still nothing changed, the mangekyou pattern was still turning.

But it was getting smaller.

" Current progress 68% "

Now the mangekyou pattern was obviously getting much smaller as the pupils were beginning to dilate.

" Abnormal pupil dilation detected, checking "

....

" It is within fault tolerance range, proceeding ahead. "

Shin was taking deep breaths, trying to clam his beating heart.

" Current progress 69% "

* Whirl *

His mangekyou sharingan finally collapsed as his entire pupil dilated, and the whites of the eyes were beginning to take on the colour purple.

Concentric circles were forming throughout the eye as the familiar pattern of Rinnegan was beginning to emerge.

As Shin patiently waited with expectations, the voice of the assistant and the wonderful feeling in his body finally emerged together.

" Current progress 70% "

....

" Change detected, scanning. "

....

" Rinnegan unlocked, prediction 100% successful. "

* Haaah *

Shin breathed a sigh of relief, he could feel it, his eyes and his body both had changed, rinnegan was supposed to give the original owner all nature releases with yin and yang.

That was on top of the Justus it gave, but Shinnosuke once again, couldn't experience the justus, as his eyes were still under evolution.

' I still have nothing to show for justus.. no worries, I just need to wait until 100% '

Shinnosuke was feeling no burden of his rinnegan.

The reason being this was his own rinnegan, built form his own chakra, not even Ashura and Indra were added to his body, no, this was all his body genetically modifying itself towards this direction due to the effect to Ashura and indra chakra.

This meant he would feel no pressure whatsoever, he will use it as freely as Madara could.

And him having Kurama's massive chakra currently was a help as well.

' Even when I don't have kurama boosting me, I could just deactivate my rinnegan and go about my way merrily, just like I can deactivate my Sharingan when I am out of chakra. '

This was the happy life of people who didn't take other's eyes, use it however you want, no pressure, no chakra exhaustion.

" Please remain clam, heartbeat accelerating. "

* Huff *

Shin breathed out, he had to clam down, he was getting excited from unlocking his own rinnegan.

This was no joke, he was a regular man before he was Shin, he had seen rinnegan on television before, and now he had it in his eye socket.

Shortly he will have completely broken justus in his arsenal as well, soon he will have everything.

And so Shin decided to relax again as reminders kept coming, and after a long time, process was finally nearing it's end.

" Current progress 99% "

Shinnosuke was currently feeling his eyes heating up as his CI assistant kept him updated.

" Tomoe are beginning to emerge, eye colour is changing from purple to red. Scanning. "

Shin nodded, yes, here it was.

The Rinnesharingan.

' Mine are completely red like Kaguya's eeh? Well it's to be expected, I am evolving myself perfectly, and the most pure form of Rinnesharingan is in the god tree. '

Shin felt the changes as the final step in his plans was now reached.

" Current progress 100% "

....

" Tomoe count, 9, match with Kaguya's Rinnesharingan 100% , prediction 70% correct. "

Shin shrugged, he had predicted he would have Sasuke's purple Rinnesharingan or tomoe rinnegan, being his twin and all.

' It would seem Sasuke didn't evolve correctly, not only did he have the Rinnegan in only one eye, he was also starting to lose chakra way too quickly afterwards. Dude couldn't even deactivate it by himself, it auto turned off when he is out of chakra. '

All this was way too similar to someone using a rinnegan not of their own.

' Was this deliberately done by the sage..? I wonder.. '

But Shin's thought process was interrupted by a chime from his CI.

" Error. System malfunction. Code red. "

Shin's eyes almost shot open from shock but he held it in.

" CI details now. "

" Scanning. "

....

" The body is attempting a reconstruction, subject is not stable. "

Smacking his lips shin asked.

" What happens if I stop the process? "

After few excruciating seconds, CI replied.

" Calculated, stopping the process will result in genetic collapse, subject will die within a minute. "

" *@#* "

Shin was currently swearing like a sailor, this wasn't planned, oh shit.