The Endless Shades of the abyss

Rainbow Dash's hoofs clop across the grass as she approaches a cave, normally she wouldn't be going near any caves on her own, but this time was a bit different, she had heard rumors that something, or somepony was hiding in the cave and hurting anypony that had entered. She walked inside the cave, it was quiet, not even the faintest sound could be heard. She slowly takes another step, being careful, She stood still, it was too quiet, why was it so quiet? Every last bone in her body was telling her to run, to get out of here now. But she continued to walk, continuing into the dark cave, but after about a few minutes of walking it was just dark, she could only see herself, and oddly the ground was smooth, just smoother than a cave floor normally is.

She wasn't liking this one bit, there's no way that the ground could be this smooth, especially with all the bumps she had felt walking into the cave. She wanted to turn around and leave, but something in the back of her mind made her push forward, continue deeper into the cave, She kept walking, but it felt like she hadn't made any progress, it almost felt like she was going in circles. But that didn't make any sense, the cave was a straight shot.

She stopped walking, there was no reason that the cave could have this much depth to it, it was time to turn back, this whole thing was most likely just a waste of time.

Rainbow Dash turned around, trotting back towards the cave's entrance. But after walking for a bit she realizes she was nowhere near the entrance. How was that possible? She had walked in a straight line, panic started to set in, there's no way she was lost. She picks up her walking pace, trotting faster and faster as her eyes dart around, looking for any sort of exit, but still seeing nothing but darkness.

Laughter echoes everywhere around her, She was really freaking out now, what was that laughing? Was it the mystery pony? Where was it coming from?

But soon her answer was answered as something began to manifest out of the void, it was pure black like the void around it.

Her head snaps towards the creature, it was the mysterious someone from the rumors, the one injuring anypony that was in the cave. She had no idea what to do now, this was worse than she expected.

Its voice echoed thought the void and back again, "A new soul enters my cave, a potential plaything for my game, it's always the same, ponies every day, running away, before I can play... But now, one has come deep enough, so let's play a game."

Fear was pumped through Dashes body, even her wings were spread, ready to fly away if things got bad "W-What game?"

"Ohhh, it’s just a simple one, one mortals consider no fun, one where they see, every bad thing, a game where If they lose, there soul turns to ooze, and I seal it away, and gain a body I've tamed."

"A-Are you... are you gonna hurt me?" Rainbow Dash said, was trying to stay calm, and in control, but it was difficult, the creature had all the power, not her.

"Physically no, but mentally so, I'll show you things that you never know... and never knew you wanted to avoid."

"W-what do you mean?" She was starting to shiver, mentally hurting her sounded worse than if she was just hurt physically

The thing laughs as what sounds like an Orchestra, plays thought the void.

Rainbow took a few steps back, the laughter and music surrounding the beast was almost hypnotizing, but not in a good way, it was creepy.

The void being starts to sing. "I am a Deamon, one that will make you brake, Realities, I have seen them, all of them running free, There was a world that you never known, one where you were never born at all."

"... W-What? T-there was a world without me? That..." She was starting to lose it, was this creature telling the truth? There was a world that she didn't exist in?

"I've seen a world of just romance"

The void manifests a lot of figures of her with ponies

"I've seen the sacrifice of mares"

The void manifests a lot of figures of her friends sacrificing themselves

"I've seen portrayals of betrayal"

The void manifests a lot of figures of her being killed by her friends

"And a ''sister's'' final stand"

The void manifests a lot of figures of her sacrificing herself to protecting Scootaloo

"I've seen you on the brink of death"

The void manifests a lot of figures of her barely alive

"I've seen you take a fillies breath"

The void manifests into a room, with Somepony pushing Scootaloo into a machine

"I've seen, a mare who gets to make it home alive, But this time it's not you"

Rainbow’s eyes widened as she saw all the things that the creature was showing her, the various worlds, she never even could have imagined were ever a possibility, the world without her, or the one of her friends betraying her, all of these were horrifying to her, but the one it ended with made her freeze "W-What did you just show me? What was that last one? It wasn't real... was it?"

"I've seen Your Hoofs, covered in red"

The void goes up to her hoofs, turning them red

"Faces of those who thanks to you are now dead"

The Deamon disappears as the factory setting returns, a manifestation of Scootaloo being scared

"I've seen a Filly scared of a mare who is haunting, a mare with a trail of bodies"

A dark figure approaches Scootaloo slowly

tears filled Rainbow’s eyes as the sight of a scared Scootaloo appeared, the thought of hurting the filly terrified her, she could never do something like that "No! Get away from her!" She shouted towards the beast, before running forward to get between Scootaloo and the mysterious figure of her, standing between the two, She stared at the demonic version of herself, how could it look exactly like her? Every last detail was the same, but there was a malevolence to this version.

The demon stands on its hind ''hoofs'', the appearance of rainbow dash starting to shift

"I've seen a world of just romance"

They shift into a mix of all the ponies she has had feelings for in the past.

"I've seen the sacrifice of mares"

They shift into Rainbow Dash holding a shield

"I've seen portrayals of betrayal"

They shift into a version of pinkie pie with a chainsaw

"And a ''sister's'' final stand"

They Shift into Scootaloo

"I've seen you on the brink of death"

They change to a blood-stained Rainbow Dash

"I've seen you take your friends breath"

"I've seen, a mare who gets to make it home alive... "

they slowly melt into their normal form.

"But this time it's not you"

Rainbow stood there, shaking as she was confronted with an endless sea of nightmares. The versions of her friends hurting her, or even sacrificing themselves for her. She had tears rolling down her face, not wanting to look at any of it, but too scared to tear her gaze away "S-stop, stop t-this please... I-I can't take it anymore"

The demon move behind her and their voice echoing around her, "Embrace the void and despair, let go, let me take control."

The words hit a nerve within her, it was such a tempting idea, to let them take control and stop being tormented by these horrid sights "N-no... I can't... I won't!" Rainbow snapped back, shaking her head vehemently.

"Well then. if you won't give me your body, there's always the next pony" they snap their fingers, the void rising around her like a lake during a heavy storm

Rainbow dash tried struggling, but the void was too strong, it started to pull her body down, there was no getting out of this, her head went below the surface, she panicked, trying to free herself, but the strength of the void was too powerful, eventually, she was completely engulfed, and slowly her conciseness faded.

The demon melted away, ready to start the same dance next time a pony entered.