Location: Somewhere in an empty city location

No POV

One night in a burning city, Y/n teleported over there after gaining some information from Madara when he fought a powerful demon that took out Mahoraga during the fight as Y/n is going to send him back to his world after taking the noble sacrifice to let Madara retreat back into the New World (Y/n and Godfield's dimension).

Y/n: (Kneels down) So...this is the place that Madara told me about and Mahoraga sacrificed himself to let him make his escape back home when he fought a powerful demon in this universe. I tracked the location of what's left of Mahoraga by the familiar shape this weird looking steering wheel.

-Flashback-

Back in Y/n's own dimension aka the New World, where he and Godfield managed to cleanse the entire world from the old world that was filled with nothing but corruption and sin as everything in this New World is back to its original sin-free state with clean fresh air to breathe in, all the trash is no longer littered with all of the recyclables put away properly, the government is no longer corrupted and evil, taxes no longer exist, etc. as we see Y/n, Mahoraga fishing at a local forest with the many members of Y/n's new family as it turns out that Mahoraga joined forces with Y/n after their first encounter at the train station.

It looks like they're both getting along just fine.

Y/n: (Speaking through flashback) If I'm not mistaken, he was one of the few demons/monsters that became an ally rather than an enemy since we met back at the train station. It's no wonder why he's adapting to the New World so easily.

Y/n: (Flashback) You know, fishing in these pure waters takes patience to catch them and waiting for a bite can work out an appetite. Are you hungry as well? If we both start fishing at the same time, there's no telling how long the fish will bite the hook on both our fishing rods. We're having a barbecue later today and I bet you're gonna love PickyPiggy's home cooking. She's an impressive chef and proud of it too. So, what would you like for her to cook for you?

-End of Flashback-

Y/n: (Sighs) You did the right thing, my friend. I will send you back home after making that noble sacrifice to let Madara make his escape back home. You deserve a break from me.

Then Y/n used his powers to bring Mahoraga back to the New World and relived him of his duties to take a huge break after all the trouble he dealt with this powerful demon that Madara fought against as the piece of what's left of him vanished into the ground.

Y/n: (Thinking) Now that he's being sent back home, I wonder who was strong enough to defeat him. Madara did say that he's a powerful demon and if he managed to put a fight for Mahoraga to make that sacrifice. He must be a danger to the humanity in this universe.

Then suddenly....

???: Hey...are you bored of life?

Y/n looked up to see the main villain of the Jujutsu Kaisen anime, Sukuna as he walked up to Y/n, asking him if he was bored of life, but Y/n decided to just ignore him and maybe he'll go away as Sukuna walked up to Y/n, still talking to him with a smug look on his face.

Sukuna: Basically, all humans around here will perish without a trace. This is surprising. I'd never seen you here before. Are you a strong person? But before we go any further, don't you understand the situation...shouldn't you be afraid if you see me. Or maybe you don't know. Who are you dealing with? Isn't that, right? What a freak.

Y/n: (Looks up to Sukuna) Is it important to know who you are? I'm not sure if you know who I am and besides, if I know about you, so what? I never even heard of you at all.

Sukuna: I am a symbol of fear...suffering and destruction. Whoever faces me...I will definitely kill...

Y/n: I fear no man...nor demon...

Y/n can already tell this is the demon that Madara fought and killed Mahoraga and he is definitely a powerful demon that Madara fought as the demon chuckled evilly before unleashing his cleave attack on Y/n to chop off his head, to which Y/n immediately teleported away just before Sukuna unleashed the attack as the result of the attack destroyed at least one or two buildings in a single blow.

Sukuna: (Chuckles Evilly) One hit. That mysterious man didn't know what hit him.

Y/n: Are you challenging me?

Sukuna was then shocked to notice that Y/n managed to dodge his attack before it could hit him as he didn't expect him to be that fast and appear behind him.

Sukuna: (Thinking) How did that guy int he cat eared cloak get behind me so quick?

Y/n then charged up his fist for an energy punch attack at Sukuna as he is going to defeat him to avenge Mahoraga's death.

Y/n: For Mahoraga.

Then Sukuna turned to face Y/n, only to get punched in the face by Y/n as the impact of the punch was so strong, Sukuna was thrown through a few buildings before landing a nearby desert as the demon never met someone that strong before in his life as he regained his footing after he endured that attack from Y/n.

Sukuna: That actually hurt...I seriously don't know who that kid is, but he's definitely a worthy opponent that I haven't fought in so long. Humans who are able to survive are the strongest humans...is that true? Or maybe...you're not human at all.

Then back to the city, where Y/n is at right now, he couldn't tell if he killed Sukuna or not after he landed such a powerful punch like that at the demon before he heard an evil laugh in the distance that came from outside the city.

Y/n: Damn. He's definitely a strong demon. Have I found another worthy foe to fight against? Still, he just goes around killing people without conscious or mercy whatsoever. What's his deal about humanity anyway? It doesn't matter to me at the least. I have to defeat him no matter what. Even some monsters in the multiverse are not what they appear to be as they can become friends with humans such as myself. Even though, I am no longer human after I became the Son of Godfield.

Y/n then transformed into one of his Gorefield forms and sunk into the ground to go after Sukuna as the demon is impressed by Y/n's powerful godly strength.

Sukuna: In his world or even this world, whoever is strong can do as he wants.

Then Y/n appeared behind Sukuna in his Centipede Gorefield form as the demon turned back to witness the monster cat as he is surprised to see such a grotesque beast like the Centipede Gorefield.

Sukuna: Impressive. Not only you throw a mean punch, but you can also transform into beast I've never seen before.

Y/n then transformed back into his normal form before walking up to Sukuna as he is not done with him yet.

Y/n: Stop with this narrow thinking of yours before you regret it when I take you out.

Sukuna: You can say that, if you are the strongest person in your world. Even though that you can transform into strange creatures of the unknown, my form has not fully awakened. So, I will show you my strength....be destroyed!!!

He then used his cleave attack on Y/n again, but he dodged it again as he appeared behind Sukuna again, but with so many clones of himself that transformed into some of his forms the many demons and monsters he fought before such as Tornt.exe, Muzan, Sonic.OMT, Sansfield, Kilobyte, Killy Willy, etc.

Y/n: Do you often miss on attacking your foes that are stronger and faster than you? You know, you remind me of another demon named Devil Mario that's been holding at grudge against me after I stole a Power Star from him.

Sukuna: Thank you for the advice. But I must admit, you're actually one of the few people I met that I considered a real worthy opponent.

Then Sukuna did a flip as he did a double cleave attack on Y/n, to which he teleported out of the way with his clones vanished, causing Sukuna to be shocked to see Y/n dodge his attack once again before Y/n teleported behind him and karate chopped him to the ground hard before did a powerful stomp attack, creating a massive crater in the ground before Y/n jumped out of the way to face Sukuna as he is getting up from the crater and is still impressed by how capable Y/n is right now.

Sukuna: Impressive sneak attack. Honest. But I'm seriously curious about you. Are you in the same clan as Gojo Satoru?

Y/n: I don't know anyone by the name of Gojo Satoru nor his clan.

Sukuna: Is that so? Then why don't we work together as partners? With your impressive strength and cursed energy and my power, we could rule this universe.

Y/n: You can't be serious right now? I don't have any cursed energy and I'm sorry, but... (Jojo Meme) I REFUSE!

Sukuna: How disappointing.

Then Sukuna disappeared in a flash, causing Y/n to look around the area to know where he's at right now.

Y/n: Did he run away or was he planning another attack?

Sukuna then grabbed Y/n's face with one hand, made a quick dash and slammed him to a nearby rocky wall of a mountain, creating a crater in the shape of Y/n's body to the rocky mountain.

Sukuna: Apart of being a demon with no cursed energy. Why did he refused my request to work together? We could've ruled this world like kings. But I'll give him time to reconsider my offer in the meantime.

Then suddenly, Y/n suddenly vanished from Sukuna's grasp as he appeared to be a fake clone, which surprised Sukuna that he just took out a clone of Y/n.

Sukuna: (Looks around) A fake? Then where did he-

Then Sukuna was grabbed in the face by a giant gloved hand before he was spun around and got slammed into the wall. Then Y/n as Kilobyte threw Sukuna into the air before jumping up in the air and punched him in the gut with another energy charged punch, only this time the energy is fueled with the cosmic energy of a black hole.

BLACK HOLE PUNCH!

The impact of the punch sent a massive jolt of pain into Sukuna as he coughed up some blood before he was hurled over to another rocky mountain nearby that collapsed to the ground after Sukuna crashed into it.

Y/n: (As Kilobyte) (Chuckles) Pathetic. He may be a strong demon but needs to pay more attention to know more about his opponent. His arrogance and his own ego will lead his own demise.

TO BE CONTINUED IN PART 3