Seijuro looked at Aizen.
"Hm... seems like your plan was quite a success." Aizen would merely smile, looking at his Karma, how nice. This power—hm, it felt just so damn powerful.
He quite liked it.
Seijuro, by now, had reached 100% Otsutsuki. Yes, the fight had made him reach that level. For some odd reason, while he was fighting Ishiki, he felt his Karma speeding up, but that speed-up stopped after Ishiki went full power—TL;DR, when his Karma was fully destroyed.
So, he was no longer human. He would watch as his Karma vanished.
So... he could plant Karma on other people now.
He had reached Otsutsuki tier.
Aizen, meanwhile, would turn his Karma.
Why, you may ask? Well, simple—he is trying to speedrun to 100%, so that when he fused back with Seijuro, it's an even 50/50 split: 50% Urashiki, 50% Ishiki.
After having nurtured the Ten Tails so much, he found quite some fascinating details.
One of which was some stuff about the Otsutsuki.
But first—
Aizen would go to Ishiki's corpse on the floor, which hadn't fully deteriorated yet, since Seijuro's seal also worked to keep it there.
There.
He found it.
The God Tree Seed...
Aight, so if needed, he could grow another Ten Tails, though not from Earth. Maybe go to another reality and take their chakra. Would be quite nice.
Hm, his plan to bait Jigen into giving him a Karma was quite nice.
Yes, he baited the man.
"That much was guaranteed. He may talk about being a god as much as he wants, at the end of the day... he was nothing more than a parasite sticking onto life, sucking the life from other planets in order to fulfill his inconsequential goals."
Aizen's eyes seemed to darken.
"A creature such as him—when faced with death—they will try and find any way to survive. Superiority complex helps quite a bit. All I had to do, simply, was mock him and his pride—and he let his anger get the best of him."
"So... you purposefully ridiculed him..."
"Bright as always. Well, I should expect as much... from me," Aizen would say with a smile.
"But you are correct in your hypothesis. I struck at his pride, because I knew at his core, he was a parasite. And like all parasites, he would try to find something else to live off—in this case, me. He would be quite happy if he were to get my body. Unfortunately for him, my—no—our souls were too strong for a vermin like him to handle."
Seijuro said nothing as Aizen walked around, Karma markings activated. Some memories from a past life were flooding his mind, and as such, he was currently thinking of darker schemes—like maybe stabbing himself in the back.
Though before that—
"He was... weak. His chakra pathway seemed to be messed up... you poisoned him," Seijuro would say calmly.
"I suppose you could say so—though I prefer to call it protection."
Seijuro was able to piece together the situation. So, Ishiki came. Aizen was nowhere to be found.
Saw the Ten Tails.
Started absorbing a shit ton of chakra from it.
Aizen popped out, roughly when the man had absorbed around a Nine Tails worth of chakra. When the man saw him, they fought.
The poison that Aizen spoke about before started taking effect, weakening the man over time. Those purple marks over his skin weren't an illusion—they were real. Aizen had used his right eye ability in order to hide it from the man.
The poison was basically killing the man from the inside. Basically, think of the shit the Demon Slayers did for Muzan. Yes, as the seconds went by, the man was dying more and more—but he had no clue. The more chakra he used... the faster he was dying.
How fun.
Time skip
It's been an hour or so... Aizen's Karma markings vanished.
He had reached the full 100%.
He would look at Seijuro and smile...
Then... he would touch his chest... where his heart was and then...
FWOOSH
Seijuro's eyes widened... hm, he should have expected this, yet he was still shocked.
...
...
...
Having fused with his other self, he could feel the power growing in his veins. This felt stronger. He felt stronger. Better.
This power—
It felt like he had gotten twice as strong as he was before.
Hm... truly a 50/50 split in power.
However, now, he had gained access to the Rinnegan, alongside Ishiki's Dojutsu.
On his forehead... a third eye seemed to be opening.
As the eye fully opened... a red eye could be seen, like a red Rinnegan. He could see quite a lot with that eye... but first—
He touched his forehead, placing a seal there... causing the eye to close.
He might start wearing something to cover his forehead.
Now... unto what he was here for.
His gaze landed on the Ten Tails.
Time skip – 8 hours later
To say that the process wasn't draining would be an understatement. The sheer amount of power he felt from his body was nothing to joke about.
Yet, he had zero control over all of it.
He could be seen going through multiple hand seals.
"Sealing Array... 128 Symbol Seals."
Multiple sealing arrays would appear all over him.
"Close."
Adamantine Chains, along with what seemed to be 128 arrays, would be seen wrapping all around his body, as the godlike power he gained was sealed away.
Not for good—nah, he worked hard for that shit.
It was sealed for now, until he learned how to properly use it. Think of it like Full Cowling or One For All, like Deku in the beginning of the series. He had zero control over this power, so he would gradually gain control by slowly removing his limiter and handling more and more of the Bijuu power.
Currently, he was like at 10%... which, hmm... was still stronger than the original Ten Tails, but still, something he could handle... quite well, might I add.
But first—
Clasping his hands together:
"Wood Style... Wood Clone."
A clone made out of wood could be seen... a piece of the Ten Tails, one might say—a piece given consciousness... a Shinju, one might even say. But enough about that, this fucker would be taking Aizen's place since he and Aizen had fused.
The Shinju would bow to him before leaving.
Hm... he even had a Rinnegan... cool.
A/N.....I look away for 5 fucking seconds....and he is a god....this is BULLSHIT.
Shift ended, thank the heaven.