Uchiha Itachi Reincarnated

Itachi quickly departed from the arena, using {{Kotoamatsukami}} to make Fen Moran take him back to his residence, before his actions had truly sunk in, by which time he had already returned to his residence.

As Itachi returned to his residence he instantly sat down and frowned.

"My emotions are harder to control than usual. This should be because of the residual will of Yun Che, and because of my fusion with his memories. I need to accelerate the process of fusion with his memories, before I truly fuse with this body and make it my own, before cleansing it of the residual will of Yun Che."

As Itachi sat motionlessly, pondering how to fuse with the memories of Yun Che and refine them faster, in order to allow his true personality to return, at the site of his battle with Fen Juebi, a commotion was occurring.

"This child... is truly a genius!"

"Agreed, agreed, I even felt vaguely threatened by that attack. What a heaven defying genius!"

As words like these resounded around the stage from the elders, the youths began to feel a hint of awe, respect and fear for this mysterious Fen Itachi, who possessed the power to even make elders feel threatened at the 4th stage of the Spirit profound realm.

However, one of the elders, Fen Jing, an old man who was stuck at the 1st rank of the Sky profound realm, unable to breakthrough in the last 10 years, the weakest of the elders, had a nefarious glint flash through his eyes.

"Possessing such strength at such a young age, and able to surpass almost two great realms, he must have had some incredible opportunities..."

Thinking such thoughts Fen Jing seemingly faded off of the arena, heading to who knows where.

At the same time, Itachi was currently purveying his memories, trying to see if there were any jutsu or techniques he'd stumbled across which would help him resolve the clashing of personalities and memories.

Although Itachi pursued power, he also didn't want to lose his sense of self, or have it become twisted and warped, by his fusion with Yun Che's memories.

After his outburst against Fen Juebi, Itachi realised that his base personality had somewhat shifted after his arrival within this new world, and he wanted to fix that.

Finally, he found what appeared to be a jutsu that could help.

{{Souruguraindo Jutsu}}!

This jutsu involved forcefully using energy to grind and refine the soul or spirit of a being, and could be used to make the soul power of an individual more potent, increasing the quality rather than the quantity of the force of someone's soul.

Itachi planned to use this to specifically target his memories, using it to grind down his memories as Yun Che, into mere information, rather than specifically memories from a past life.

After he did this he would merge this information into his main memory mass, his memories as Itachi.

Doing this would cause some of the information present within Yun Che's memories to not be saved and transferred over, however it would preserve most of it.

Previously Itachi had been hesitant, but after relying that his underlying personality had been subtly influenced, Itachi instantly decided to undergo this 'surgery'.

Itachi initiated the {{Souruguraindo Jutsu}} and instantly felt a piercing pain within his head, as if there were thousands of ants crawling inside his head.

Itachi gritted his teeth and continued on with the jutsu, knowing he would have to suffer hours of this pain before the memories would be suitably refined down.

And so Itachi began this incredible task.

At the same time Fen Jing began searching for the residence of Itachi.

He decided to strike while the iron was hot, before Itachi could truly grow and became renowned throughout the clan, since it would be almost impossible for him to act then.

Fen Jing's mind also appeared to have become slightly addled after many years of being stuck at the same rank of cultivation, making absolutely no progress had clearly turned him slightly insane.

At the same time as Itachi cultivated the {{Souruguraindo Jutsu}} Fen Jing eventually found out where Itachi lived, only having taken around 2 hours to search incredibly discreetly, and then deciding to head towards Itachi's residence at night.

Having made his decision Fen Jing waited for nightfall, before he made his move.

As night fell, Itachi himself fully finished the {{Souruguraindo Jutsu}}.

As he opened his eyes, although he appeared incredibly fatigued, there was also an incredible aura of coldness, that hadn't been present before.

It was as if a slumbering beast within Itachi had awoken, and it was exuding an aura of incredible aloofness upon once more being released into the world.

Itachi pondered for a second, before suddenly whipping his head around towards the door of his residence, which had opened slightly, allowing a shadowy figure to enter into his residence.

Itachi vaguely recognised him from the arena earlier, remembering him as a low ranked elder, however where as before Itachi may have questioned him as to why he was here, he could sense the ill intent evident within the elder's actions.

"He probably wants to find out where I gained such incredible power from at such a young age, able to fight far above my realm."

Thinking to this point Itachi smiled towards the elder, although his smile didn't seem happy and cheerful but unfathomably cold and dark, as if it was the smile of an asura from the deepest abyss in hell.

As soon as Fen Jing saw this smile, he felt not only guilty but also fearful for his actions, knowing that they were shameful, albeit he was simply too envious and curious of Itachi's apparent incredible talents.

"Impudent child disrespecting your elders, punishable with death!"

Hearing the deluded words of Fen Jing, Itachi simply laughed mirthlessly, before activating his sharingan.

"{{Kamui}}!"

Itachi simply stared directly at Fen Jing, before he could even unleash his attack, and severed his head using {{Kamui}}, teleporting his head into the separate {{Kamui}} dimension.

Within that separate dimension incredible shock was still evident on Fen Jing's face as if he couldn't believe that he would die so fast and so unexpectedly to such a young boy.

Truly a ruthless move from Itachi, however he still emanated that same ripple-less, cold aura, as if nothing had happened.

Jasmine had watched all of this, and along with becoming even more curious about Itachi's eyes, also became curious about why his personality had changed so drastically after a simple soul refinement, as Itachi had told her that the {{Souruguraindo Jutsu}} was a soul refining jutsu she didn't realise that he had used it to refine memories instead, since usually there would be no point to that.

Little did she realise that the actions of Itachi, symbolised that the cold and aloof child prodigy of the Uchiha clan, had now truly once more appeared within the world, ready to whip up a storm of blood and merciless slaughter within his new world.

Itachi burned the body of Fen Jing using {{Amaterasu}} after ascertaining that he had no treasures of interest to Itachi, before returning to sleep as if nothing had happened.