Jujutsu Kaisen: I am Sasuke Uchiha

*Sigh. The overall strength and chakra levels of this world aren't bad, but the inhabitants aren't nearly as strong enough as we were.

I know you wouldn't want to involve yourself in any extraterrestrial feud, but you'll have to.

You won't have a choice, but to fight. The Otsutsuki would recognise you, Sasuke. They'd come after you. You'll have to fight if you want to survive, you're this world's only hope."

Sasuke's heart shook. This was a massive responsibility. It wasn't even possible to go hide in some cave or something when they arrived because they were going to find him one way or the other.

He had to fight whether he liked it or not, and he was going to die in the end. After all that struggling and striving to become strong, he was just going to die in the end. He didn't think he would be able to stop an Otsutsuki invasion by himself, he wasn't powerful enough. Even the OG Naruto characters weren't as powerful.

Not even Gojo, or Sukuna or Kenjaku was powerful enough to take on any of the Otsutsuki.

The OG shook his head, seeing the distraught expression on Sasuke's face. He and Naruto had failed to protect everything they loved. It was unfair to shove all that responsibility to someone so young, but no one would be able to bear the responsibility but him..

"From what you said earlier, there's an incarnation of Naruto just like me who has had such a powerful responsibility thrust upon him without consent to anything yeah? What a headache.."

Clearly Sasuke was over the emotional pain and was now thinking with clarity. Since he was just going to die in the end there was no point in complaining. He wouldn't go down without a fight.

"Yes. Naruto's successor is somewhere out there. I can sense his presence. He's still growing just like you are. I'm sure at peak strength you two should be able to create a mental link in order to communicate.."

The OG clarified and he nodded.

"Fuck!!!"

A period of silence reigned for a moment, before he cursed out in extreme wrath.

"How strong is the Otsutsuki God, and the pure blooded clan members? How powerful would I have to grow to take them down?"

Sasuke asked and looked towards his OG who couldn't help but let out a smile.

"The pure blooded Otsutsuki clansmen scale at least above planetary level and at most to the solar system or multi planetary level. Naruto and I at the peak of our power scaled to at least above planetary levels of power.

Their God on the other hand was even more powerful than that. So powerful that his power felt indescribable. Even I can't determine to what level he scales to.."

The OG spoke and Sasuke's brows raised for a bit.

Multi planetary level? Above that? Sasuke was intrigued.

As stated by the author of JJK Gojo could solo all of mankind if he wanted to, such levels of power was probably scaled at most to planetary levels of power, and that was being generous. And he was supposed to go even beyond that, and go even beyond the limit of his potential if he wanted to win.

"I need to grow even stronger. Can you train me?"

Sasuke asked, eliciting a smile from his counterpart.

"My pleasure. Come with me.."

He smiled and took the lead, leading him beyond the stretch of mountains and valleys, until they arrived near a waterfall.

There, the OG waved his hand, and a stream of wind cleared the misty fog surrounding the vicinity.

He then performed a set of hand seals and in a puff of smoke, multiple figures appeared in a flash.

"This is..."

Sasuke's eyes widened in shock. The figures before him were not clones or anything, rather they were younger and previous versions of the OG, even the baby Sasuke, all of them looking towards him with a stark indifference.

Smiling, the OG waved his hand and about three versions of himself seemed to turn into float in the air, their bodies shattering and turning into crystals before they coalesced in to a small ball of chakra that swirled in his palm.

In summary, from what Sasuke could tell, he had turned every version of himself, from when he was born to the three tomoe version of himself that fought Deidara (Hebi Sasuke) into those chakra balls rotating in his palms.

Stretching his palm, the orb flew towards our Sasuke who stretched out his palm and received it with surprise filled eyes, as he watched the orb revolve in his hands.

Without hesitation he drove the energy orb right into his chest, as a powerful and volatile stream of energy rushed into his brain causing him to scream out in immense pain.

"That orb contained every single aspect of early my life. My battle experience, my sorrows, my fears, my hatred, it contains it all. You'll need some time to digest and comb through all that knowledge to make it a part of you. You'll need to relive those memories in order to assimilate it all..."

At a point, Sasuke couldn't even hear a single thing due to the intensity of the pain. It was as if millions of micro needles were poking his brain all at once. He began bleeding from all orifices and after about several minutes he slumped into unconsciousness.

*

*

Several minutes later..

"Ughhh.."

With a groan, his eyelashes fluttered and his eyes snapped open. His onyx irises seemed even brighter than before as he gazed into the sky with a profound clarity, something that was clearly missing before...

Letting out a breath, Sasuke slowly sat up, and looked around spotting the OG walking towards him with an expressionless face.

"What happened? I feel different. Better. What has happened to me?"

He asked, as the face of the OG cracked into a smile.

"It would seem you assimilated everything perfectly."

His voice calm as he inspected Sasuke with his Rinnegan.

Delving into his consciousness, Sasuke coursed through the memories he had assimilated before he shook his head.

The OG Sasuke was a monster. Even at such a young age, the sheer technicality of his battle prowess, intellect and usage of the Sharingan etc, all outclassed him. It was not even a conversation to have. At first he thought he was strong, but a young three tomoe Sharingan Sasuke would just one shot him if they fought. That was how wide the gap was.

Sasuke couldn't help but lower his head in inferiority before a sigh escaped his lips. On the bright side, at least he was equal to a teenage three tomoe Sharingan OG Sasuke, a version that could go against Deidara and win.

" Before I came here, I was involved in a battle and an acquaintance of mine said to me that, I was special, different and that I was a gift to Jujutsu...I did not know what he meant, but I can sense now that it has something to do with my physique doesn't it?"

Taking a look at his own body, Sasuke's Sharingan activated, as he looked within, noticing the significant increase in the quality and quantity of the cursed energy that flowed within his body.

Normally, for any sorcerer, cursed energy levels were predetermined at birth, although one's clan, talent and heritage played a part in influencing the quality and quantity of one's reserves. However for him, it seemed like he was different. He had not noticed it at first due to the fact that the increase was minute, but after this exponential growth, he could finally sense it -- his cursed energy reserves grew along with his power and the more he assimilated his inherited abilities.

"This is truly the case. During your rebirth, when the two souls within you combined, a massive amount of energy was released. I used that energy to remodel your body, providing you with a unique physique that was above all else, one that bore extreme affinity with the foreign energy in your world.

The rest, I sealed within the system, only to be released as you inherit more of my power."

The OG spoke, and realization dawned on Sasuke as he understood.

"It seems I possess some sort of Cursed energy godly physique. No wonder curses are rather attracted to me as if I was the best meal in the world. That also explains why the Star Religious Group planned to kill me.

They want to offer my body to Tengen as the perfect vessel ever created.."

He monologued, thinking deeply for a moment before shaking his head.

"Now that the assimilation process is over, there's a final test to undergo, before you leave this place. Think of it, as something resembling the Shinobi examination back in my world.."

"Wait.."

Sasuke wanted to ask more questions, but the OG fizzled into smoke after he finished speaking.

In his stead, a figure appeared in a crouched position, dressed in the typical Shinobi ninja wear.

What stood out about him, and what shocked Sasuke was his most prominent feature, the spiky white hair that shone brightly.

As he slowly arose, his full visage came into view, revealing a masked lower face, and his Shinobi headband tilted to cover his right eye.

"No way..."

Sasuke's mouth gaped in surprise, and he unconsciously took a step back, while the eye of the new figure gazed towards him.

"It's been a while...Sasuke.

Come at me with everything. I won't go easy on you.."

The figure spoke and slowly shifted into a stance, while Sasuke clenched his fist and stabilized his beating heart.

Of all the people within Naruto franchise he could battle, why did it have to be him? Why did it have to be the "copy ninja" Kakashi Hatake himself.

A/N: I know some of you aren't happy about the crossover and whatnot. But I thought it'd be fun. I wanted the MC to have a real motivation to grow stronger, not just to surpass Gojo and the others.

And trust me, it would be amazing. I started writing on that part and even I'm loving it. But the crossover isn't happening anytime soon, so for those of you worried. Don't be.

So stay tuned for more guys. Lemme know what you guys think in the comments and let those donations flow.