Universe beyond The Reality

William, who now calls himself 404, watched the Multiverse alone for 50,000 years, learned everything and anything about it, with now being called White Demon by the inhabitants of the Multiverse due to being a mystery and a powerful figure in the Multiverse. A cosmic entity from the beyond, noticed 404 and thought about creating a Better version of him, which resulted the creation of Virus404 who named himself Jack. Virus404 wondered through the endless Infinisphere and the infinite Multiverses. He was interested in an entity who calls himself also 404. As he watched him he declared 404 as his beta version.

Soon enough, Virus404 started to cause havoc in the Prime Multiverse, 404 noticed this and went into it to investigate. 404 found code signatures in the ruins of a destroyed Universe, which surprisingly resembled to his, but it was more chaotic and destructive. Then, an holographic interfece appeared in front of him, he entered the code signatures and he made research in the whole Reality through the Mainframe and he found the entity. It was located outside of the Prime Multiverse, 404 opened a portal and reached this place.

"Well, well, well, isn't it my beta version?" said Jack.

"What are you talking about, Anomaly?" asked 404 in a threatining tone.

"Anomaly? Isn't this how Error talks?" said Virus404.

"You shouldn't have existed in the first place" said 404 still threatining.

"I see you really want to fight" said Jack while also smiling, then a god-ray came at speeds infinitely faster than Jack and froze him.

"I'm ending you now, I will not risk anything" said 404 as he then fired the second god-ray. However, Jack wasn't erased from existence

"How do yo-" but even before 404 can finish, Jack sent beams of chaos, with these being faster than the god-ray. 404 dodged them and then summoned his broken blasters.

"Didn't you have anything more creative?" said Jack before getting blasted by the blasters. Then, 404 appeared in front of him and got ready to punch him. However before the punch touches him, Jack teleported and the Multiverse behind him got destroyed with the physical force of the punch. Then Jack threw several Multiverses at 404 who caught them and blitzed at Jack. Then Jack punched 404 and this fractured space-time while he was sent flying. Then 404 teleported to his HQ

"I'm not dealing with that space-time bending shit" he thought to himself.

"You are not escaping that quick" said Jack as he appeared in the HQ.

The fight continued in the HQ with the Mainframe in the system of 404 being far more protective and sensitive as with his virus nature, Jack was able to trigger Mainframe. 404 started to turn into Butterfly

"You are not aware of what you are doing" 404 said in a very glitchy and satanic tone, his eye sockets fully became blue, 4 wings extended from his back. Butterfly with his power got the whole control of the reality.

"Shit" said Jack as he tried to collapse space onto Butterfly who ignored this. Jack tried reverting back Butterfly through reverting time but his body and his whole physical form got blasted by Butterfly. Then, he regenerated and started to transform into Overkill, a form that has been copied from 404. Overkill created a red field around him so that Butterfly wouldn't be able to turn him back. The fight was devastating. Overkill fired rip-rays from his fingers which shred through Butterfly who fired supernova beams from his wings which cut through the reality and Overkill who summoned spikes with speeds beyond infinite which stabbed Butterfly, injecting and corrupting him with viruses.

[Security Protocols Activating] said Butterfly in a robotic tone as then a big explosion sent Overkill away.

[Charging the Mainframe Cannon] said Butterfly as a big ring appeared and more than infinite energy has been charged. Then, Butterfly fired the Cannon which was capable of destroying more than one Reality. However, Butterfly limited the cannon's strength so it wouldn't destroy the Reality. Overkill teleported in front of Butterfly while the cannon was fired and pushed him into the Mainframe, but most of the code of the Mainframe was inside Butterfly and its other parts got absorbed by Butterfly. Then, the red shield of Overkill broke and Butterfly forced Overkill to transform back into Jack. Then, with a shockwave, he disappeared. 404's body became raw ideas and concepts, but his mind was still intact. He was in a place called Dreamlands, specifically in an Universe in the Dreamlands.

He was floating in the ruins of an ancient temple when he heard a voice.

"Hey" said the voice, 404 turned around.

"I thought I was formless" said 404.

"You are, you have no physical form, I just can see conceptual entities that's it" said the skeleton.

"My Name is Sans, though, since there is more than infinite Sanses in your Reality, call me Matrix" said Matrix.

"My name is 404" said 404, Matrix started laughing but tried to hold himself.

"Who gave you that name? A 9 year old?" asked Matrix.

"It was given to me by the inhabitants of my Multiverse due to the constant 404 popups that happened around me" said 404 as they started to walk through the ruins.

"So how did you get here?" asked Matrix.

"I accidentally absorbed the Reality's lifeblood and then my whole body became raw ideas" said 404.

"Interesting" said Matrix. After they left the ruins, they arrived to Cosdin, a place with cosmic structures floating around.

"How big is this Universe? How do even Realities fit here?" asked 404.

"Well, this Universe exists in Reality 0 and inside there, the Dreamlands. This Universe, hmm how could I say, is inaccessibly larger than a Reality, so basically any number of them fit here" said Matrix.

"Anyways, what's your real name?" asked Matrix. 404 hesitated a little bit.

"William" said 404. Then, a tall skeleton appeared in front of them.

"Brother, who is this floating entity?" asked Papyrus with a serious tone.

"A guy from reality 6" said Matrix.

"Why he is out of his reality?" asked Papyrus.

"Ask him" said Matrix.

"An explosion of the energy source of the Reality" said 404. Then both 404 and Matrix continued traveling as Matrix showed him the Grillby's of their Universe. He entered afterwards and Grillby gave them a star shaped meal which they ate.

"While you are here, I will try to send you back to Reality 6 but from what I see I cannot do it with my abilities and will do it with my technology" said Matrix. Then both of them left Grillby's and went to Matrix's Lab as Matrix started to construct a machine that is supposed to open a portal through dimensions and Superdimensions. However some unknown force was preventing it. Matrix didn't bother with it though. Matrix showed 404 places in Othertale such as Hotlands, a place so hot that any sort of measurement like infinity is to its heat. Matrix then showed him his old lab which was located in the depths of Hotland. Matrix also showed him his studies about conceptual energies and Cosmic Essence.

"Sadly..." said Matrix, pointing to tubes.

"Cosmic Essence and Conceptual energy doesn't fit each other and create these abominations that are unstoppable forces" continued Matrix, 404 looked at them. They were impossible to describe. 404 then saw something on the ground.

"What is that?" asked 404 while pointing at it.

"Its appearance looks like liquid DT, however this is Nexus code and somehow it's in a liquid state" said Matrix.

"What even is Nexus" asked 404.

"Think of the Mainframe but in much bigger and deeper, there is like 3 layers to it including the Mainframe, however I only know that and the Nullvoid" said Matrix.

"It seems that this Mainframe code came from the void below the lab" said Matrix.

"Wait there is a void below this lab?" asked 404 but Matrix didn't really care about the question and continued.

"I can sense Mainframe energy down below" said Matrix.

"Do you think it might be my body or something?" asked 404.

"It might be. However I don't remember this Mainframe having this much power" said Matrix.

"I'm gonna go down" said 404 but Matrix held him.

"That void can erase conceptual stuff, you need my protection" said Matrix and applied a shield that could protect 404 from the Void. Then both went there. Matrix and 404 were floating in the endlessly destroying Void, matter, Super-spacetime, concepts, energy, all of it would be devoured by the Void. However there was this skeleton ressembling 404 in shape and even in clothing, but the skeleton wore a black coat with black fluff with red lines spreading in it. The skeleton turned at the direction of Matrix and 404. The skeleton had a blood-red smile and empty eye-sockets looking like a void. The only thing that could be seen inside them were blood-red pupils of the skeleton.

"Finally... finally you came. I was imprisoned in this timeless void for God knows how much but IT'S TIME FOR ME TO GET MY REVENGE!" shouted the skeleton as his face melted, replacing it with a black substance. Same with all of his body. 404 was terrified due to such a Mainframe energy output. The skeleton, who 404 named Overdrive in his mind, gained eight wings which resembled like 404's Butterfly transformation.

"I WAS THE MAIN CHARACTER BEFORE YOU BECAME SOMETHING!" said Overdrive, now going for 404. Then a big hand catched Overdrive, sending him in the even deeper parts of the void, completly destroying his body, mind and everything allowing him to function. However his body regenerated. Then he grabbed the arm of 404 and ripped it off. Then, Matrix fired a ray from his finger which acted like a bullet for a human against Overdrive. His body was going to fall into the deepest parts of the void but Matrix grabbed the body and went to the lab with 404.

"It's time to regenerate your arm" said Matrix as he regenerated 404's arm and forced 404 to get inside the body. As he did this, the body transformed back to its original state and warped into 404's real body. Matrix and 404 left the lab, Matrix showed him places such as the Inferno Lands, a big city producing energies beyond infinity. As they passed the city they reached a hallway, a big one, but even before Matrix could start explaining 404 got teleported to the Transvoid and became one with his other part.

"It's good to become whole again" said 404 as he left the Transvoid.