"None of you should be here." The being said. "How exactly did you end up here anyway?"
"Long story." Poison answered. "We no clipped out of our reality, entering a sort of pocket dimension, from there we ended up in this reality."
"I see that the glitches have worsened." The being lamented.
"Who are you anyway?" The Doctor asked.
"Me? I am Null, the first traveller. I have seen every planet in the universe and this one I called my home. It used to be a lush paradise, peppered with tropical trees and blue grass, but the glitch has taken it, corrupted it. It is now a planet of errors. The walls separating each universe have all collapsed."
"Wait a minute, if that's true and we have crossed into this world via said glitch, a weak point in reality, then perhaps this world isn't real! Maybe it is a simulation, glitching, which means.."
"The red haired woman is sadly correct. The Atlas created all worlds, and now it is dying, the end of the multiverse is coming. I'd hoped to have been able to wait it out in relative comfort, but in truth, I am terrified. I really don't want to die."
"No, wait this can't be true, I know I'm real! I think, therefore I am, right?" The was a hint of dread in the Time Lord's voice.
"Does this have anything to do with the nightmare I just had?" Josh asked.
"What nightmare? Describe it for me." Null requested.
Josh told him of the swirling stars, galaxies and universes. He told him of the crimson eyed abomination which devoured them all and smiled.
"Crimson eyes? The crimson eye of the Atlas sees all." Null replied.
"Shit!" Poison realised. "We have to head back to the SCP Foun- I mean the science institute I work for! They studied that exact reoccurring nightmare in thousands of-"
"No! You must speak with the Atlas, it will no longer speak to me. You must ask what the nightmare means!"
"But now we have someone who's actually had it! This is big, if we take him back to the facility, we can study him and the foundation might finally get to bottom of-"
"The Sentinels are back!" Five yelled, glancing through the window to the cave outside.
"Go! Head through my teleport! It's at the back of my farm!" Null pleaded.
"When we arrived it was deactivated!"
"Well, I reactivated it! Head through, I'll hold off the sentinel scourge!"
"Come with us!" The Doctor urged.
"I told you, the Atlas will no longer speak to me, we have no time, head through the gate!"
Null reached behind his back an pulled out an advanced looking rifle from his holster. He armed it and waited at the door, urging the four others towards the teleport at the end of the farm. It was now activated as evidenced the glow cyan energy swirl coursing through the centre of the infrastructure. Josh heard the familiar raging screams of the dreaded drones grow louder in volume. The Doctor scanned it to make sure it was safe to travel through and with a nod of approval each of the four jumped through the teleport gate one by one.
A veil of cyan energy surrounded Josh with hurricane force. The sound of aching machinery rushed into his skull, reaching a crescendo before stopping altogether as the sounds and sights of a pleasant forest came into focus.
"Well, I've had better teleportations." The Doctor said as Josh picked himself up of the alien, yet lush ground. The green, grassy hills surrounding them were populated by various trees with orange leaves, several quadrupedal animals of unknown kinds and enormous purple flora, like exotic willow flowers, towering over the landscape.
The Doctor sniffed. "Hmm, air is breathable, temperature is mild, humidity is moderate. Did Null know he was sending us here?"
The sky above, a tender lilac, contained a massive diamond shaped object with a crimson eye at the centre, like a space station in a low celestial orbit.
"Wait! That's the same shape we saw in the backrooms! The door that took us to this dimension. If Null really is right, which I doubt, if I'm honest, not inclined to think the multiverse has a creator, then we need to get to that station."
"Null said that the multiverse is ending, is he right, Doctor?" Josh asked with fear.
"N-no! Of course not, travelling between universes is normal! He has no evidence of multiversal apocalypse!" The Doctor denied.
Five leaned in. "You can tell me the truth, to say the least I have plenty of apocalypse experience."
"I am telling the truth!"
Five shook his head and tutted. "Really? You sound scared, I would be too, you know something we don't, don't you?"
"I know plenty of things you don't. How many planets exist in the Andromeda galaxy; it's exactly fourteen trillion by the way, but there is no multiverse apocalypse. Destroying a planet is one thing, fairly common too, but destroying all of reality? Even my people couldn't do that!"
During this conversation a black monolith came into view, towering over the lush landscape. The four approached it as the Doctor scanned it with her sonic screwdriver. An alien symbol, etched into the structure, lit up in a shade of amber. A booming, celestial voice bellowed out.
"Find us! Seek us! Speak with us!"
Josh felt a sweeping urge to obey, as though this were a divine command, echoed by archangels. The light of the station above, its crimson eye, flashed in a rhythm that seemed somehow familiar. A beam of light, shot upwards from some distance away, across the sweeping hills and dense overgrowth. A beacon perhaps? A way to reach the station orbiting above? Josh didn't know, but he felt compelled to walk towards it anyway. The rest had already begun the journey, he might as well follow.