Everybody was in complete shock as to what just happened. Kalasha was on his knees, tired from the ritual he had just performed.

Kalasha: *Pant*...*Pant*...

Midoriya: Kalasha! Are you okay...?

Kalasha: Yes. I'm just a little drained from what just happened...

???: Hey! Is everything okay down there?!

Everybody in the backyard then looked up in confusion as they laid eyes upon the three strongest warriors of HOH next to you. Lotus, Kasai, and Maquist.

Lotus: We felt Y/N's energy skyrocket. What's the situation?

Kalasha: Nothing that should concern you. Y/N is stepping into his home world for the first time...

Lotus: What...?

Ruby: So if Y/N manages to beat that Guardian you told us about, will we be able to join him in there...?

Kalasha: It's all up to him. The Celestial King has complete and total control over the Celestial Realm, and he'll eventually find out that's not just hyperbole. He'll be able to do whatever he wants in that realm without being bound to any consequences.

Issei: Woah...

Kalasha: But first, he must deem himself worthy by defeating The Celestial Guardian that watches over the entire realm. If he can do that, it's set in stone.

Meanwhile: The Celestial Realm

After travelling through a surprisingly powerful vortex, you eventually came out the other end and found yourself in your homeland. The Celestial Realm.

Upon laying eyes upon what was in front of you, you had concluded that Kalasha was correct. The Celestial Realm was like no realm you've seen before.

Y/N: Holy Shit...

The Celestial Realm from what it seemed was on a much greater scale in size than both The First and Second Reality combined.

Only faint little noises could escape from your mouth as you gazed upon an Infinite amount of Multiverses, and macrocosms even larger than that of a Multiverse.

Y/N: I can't believe what I'm seeing...!! There doesn't seem to be an end...!!

Just one of these bubble like structures was already larger than one of the realities. The First Reality is an infinitely growing multiverse containing an infinite amount of worlds.

The Second Reality is one dimension, but one that infinitely expands in size. In their own ways, both the first and second realities were infinite, but the scale of this realm was much MUCH greater.

Needless to say, even for you, it was a little overwhelming.

Y/N: My Previous Incarnations RULED this Realm...?!

All of a sudden you started to hear some strange sounds. Almost like growling of another creature, but you couldn't see it anywhere.

You looked around but you couldn't find anyone or anything besides the realm itself. However once you looked up you realized why you couldn't spot it's body.

You found yourself surrounded by the curled up body of a Cosmic sized Dragon that looked down upon you. It's body looking identical to the space around you.

Y/N: Oh my god...

The Celestial Guardian

Y/N: I've fought Giant enemies before, but THIS is just ridiculous...!! This must be the guardian...!

With that The Dragon let out a echoed through the entirety of space. Thankfully you were still in Genkai Deity mode so you had that to your advantage.

Not being in the best position, you decided to make a run for it for the time being as you bolted into the distance. The Giant Guardian letting out another road and chasing after you.

For it's size, it was rather fast. It was able to keep up with you with 50% of The Genkai Deity's power. Opening up it's mouth, it fired a massive beam of cosmic energy out of it's maw as you turned and noticed this.

Y/N: Hmph!

Having great confidence in your strength, you powered up with a large aura and charged right for the beam.

You were expecting to be able to bulldoze right through it, but you were proven wrong when it almost instantly overpowered you not even seconds after clashing.

You went flying into the distance as The Celestial Guardian chased after you with incredible speed, you managed to recover from the blast as you regained your composure with widened eyes.

Y/N: Man, I guess you do deserve your title!

With that last attack you now knew that it would be foolish to simply attack it head on. You didn't want to kill it, just defeat it.

You decided that you would have to run for now in order to Analyze the way it moves and try to find a weak spot to exploit. And you did just that.

Leaping from planet to planet like causal platforms, The Celestial Guardian only continued to chase after you as you decided to fire a few blasts at it as a distraction.

However your normal blasts only went right through it. This caught your attention as you started to think. But you had to act fast as The Creature was only getting closer as each minute passed by.

Y/N: My Normal attacks have phased right through it, but it seems to solidify whenever it prepares to attack me. All I need is a good opening...

The next thing you knew, The Guardian appeared in front of you as if it was out of thin air. And you also noticed that it was larger as well.

Y/N: Wait, is it getting bigger?!

All of a sudden the tail of the Guardian bursted from the ground of the planet that you were standing on. Splitting it in half as you were sent flying into the air.

Eye-Catch

Eye-Catch

Not even having a moment to react, The Celestial Guardian then opened it's mouth once more and fired another beam of energy.

This time however it was a direct hit. The pressure from this creature's attacks weren't like anything you had ever felt before.

As you were being overwhelmed by the giant pillar of energy you started to growl and power up once more.

Your hair slowly started to turn red, as did your eyes. Your aura growing to the size of a planet as you bursted your way out of the beam by force with a Transformation.

Y/N: Consider yourself lucky! You're the first to see this combination!

Genkai Deity Y/N (50%) (Super Saiyan God)

The Celestial Guardian could feel how much your power had gone up, and it recognized you as The Genkai Deity.

However the fight wasn't over just yet. The Massive creature prepared one last cosmic blast from it's mouth as you smiled at the sight of this.

Y/N: You still want more...?

As a response, you slowly cupped your hands together and pulled them to your side. Slowly a small orb of blue Ki began to form in your palms as The Celestial Dragon's attack was only getting bigger as it charged up.

Y/N: KA...ME...HA...ME...

The Celestial Guardian then fired it's attack as a beam of cosmic energy that was at least twice the size of anything it fired before, fired out of it's maw.

Throwing your hands out forward, you let out a powerful scream and unleashed one of the biggest Kamehameha waves in the history of the technique's users.

Y/N: HAAA!!!

The beams clashed for a short moment but yours was almost instantly overtaken. The Celestial Guardian's blast instantly engulfed you as you let out a loud scream.

Y/N: GYAAAAAH!!!

The blast ended off with a large explosion as The Guardian's body was still solid and vulnerable. This gave you the opening that you needed.

The Celestial Guardian then looked down to see that you were right below it, with an even more power Kamehameha wave charged up in your hands.

Turns out that The Celestial had won the beam struggle, but it was against a clone. Allowing you to skip through the rubble in the air and get to it's blind spot.

Y/N: You should be more careful when you spread rubble everywhere!!

You then thrusted your arms forward as The Guardian's stomach was instantly ravaged by a massive Beam of blue light.

Out of your hands came out a Kamehameha wave that was big enough to swallow up an entire Multiverse if need be.

Y/N: HAAAAA!!!

After The Blast

A few minutes had gone by as The Celestial Guardian was now floating around unconscious. It had shrunk down to size and was now only about twice your size.

It was out cold, but not dead. You had made sure of that. Even though you had access to even greater levels of power, this was still a tricky fight to figure out, and The Celestial Guardian itself was no pushover. It's definitely up there in the top 10 most powerful beings you had ever faced by far.

Y/N: I did it...

With that last attack, you were left exhausted, but you refused to let your string of consciousness break. You had defeated The Celestial Guardian, and the realm was now reclaimed.

Y/N: That was probably the biggest blast I have ever fired in my life...

Meanwhile: The Second Reality

Kalasha, Lotus, Kasai, and everybody else was still in the backyard, awaiting your return as Kalasha was the most nervous out of everybody.

Yang: I'm starting to get worried...it's been an hour...

Kirishima: Whatever Y/N is facing it must be powerful...

At that moment everybody noticed several bits of lightning popping up in the air. Slowly but surely flows of multicoloured energy also started to get in the mix.

Eventually you rose out of this burst of energy as everybody was overjoyed to see that you were okay. Especially S/N and Chloe.

S/N: Dad!!

Chloe: Papa!!

Y/N: Phew...it's been a long time since I've had to take things that far.

Kirishima: Y/N! Did you beat it?!

Y/N: I sure did!

Lotus: I knew you'd pull it off.

Akko: So what's The Celestial Realm like...? I'm dying to know!

Y/N: It's...incredible...

Kalasha: So...what's your plan now? You're still here, so that's our proof that you beat it. What will you do now?

Y/N: I'm still figuring that out...but I had a bit of an idea.

Yang: Hm?

Y/N: What if we make a new facility there? Some sort of...Cross-world College that's also a school for younger ones!

Yang: You might be onto something there...

Kalasha: If you could grant me permission, I can enter The Celestial Realm and start building you this facility if you'd like.

Y/N: Sure thing...but for now...I'm a little sleepy...

And with that, a New Journey begins. What kind of mysteries lie ahead in The Celestial Realm? What kind of things will our heroes find? Stay tuned and find out!