I tumbled down the stone stairs, hitting my body against them from all sides, free-falling like a rag-doll.

Clunk. Clunk. Crack.

I fell once more and landed flat on my belly. Everything could only be seen in a daze. I held my hooves up to my face, but I only saw a blur. The world spun around me, even while trying to steady myself on the walls. Confusion, chaos, and panic took over as I stumbled wildly around in the darkness, but it didn't matter which direction I would run in, because I would find myself standing in front of a wall. I didn't know how long I ran, but I eventually fell onto the floor from exhaustion. I lay on the floor, trying to find something in the dimly lit room. But all I saw were walls. It felt as if they were creeping closer - that they were trying to trap me. I had to escape; now.

"It seems like you're lost, little pony."

I screamed because the owner of the voice had been standing behind me. I fell over and turned around to see a lumpy pony-like figure radiating a glowing light. From the illumination of what I assumed to be a horn, I saw that its coat was a tangle of green hairs with random knots scattered throughout. His mane matched his coat in both shade of color and its wild nature. Both his eyes were bloodshot, crawling with red veins and beating with each of his hoarse breaths.

He held out his hoof, "my name is Doctor Emerald."

I tried to pick myself up off the floor, but failed to do so properly. I fell over and I lay on my side, staring in the general direction of the random pony. Something was wrong with my legs. No, not my legs… I could feel them fine. Something was wrong with my head. My body wouldn't follow my commands.

"Are you alright?" he asked me, "oh dear! You must be hurt in the head." He probed his hoof into my scalp. I felt his hoof dig into my skull.
"Oh dear. We ought to get this fixed right away." He hoisted me onto his back and carried me somewhere deeper into the castle. With every step the pony took, I could feel my fractured skull shifting positions. In the blur, I could see the room change from darkness to light and from stone to chrome. I knew that I was brought deeper in because the sounds of the outside world had been completely muted.

I was dropped down on some surface, and a powerful green glow glazed over my body. I heard cracking sounds coming from within my body. My bones shifted within the flesh, rearranging themselves to their proper order. The green glow dissipated and everything felt normal. There was no trace of any injuries at all. I was okay. I was going to live! However, this joy was short-lived. I nearly soiled myself once I clearly saw my surroundings. I had been brought to a laboratory of some sorts where the corpses of ponies lined the walls, suspended in tubes filled with an anemic liquid. Display cases on the other side of the room exhibited various organs, from hearts to livers, still well alive and beating. The ceiling was plastered with cutie marks, tanned and manufactured into a rainbow mosaic of death.

A hoof fell on my shoulder, "isn't it beautiful?"

I was too horrified to speak. I let go of my bodily fluids once he showed me his collection of 'toys'. Bloodied medal screws, spikes, and bolts were neatly arranged in cabinets, next to the pony-size blending machine.

The Doctor continued discursively, "my art. My art is beautiful." He brought out a large jewel encrusted knife with a serrated black blade shaped like a screw. He slowly stroked around the blades, singing to it as if it were a child.
My mind screamed at my body to escape, but it wouldn't listen. The Doctor approached me, staring with his wild eyes. He walked closer, and closer, then past me. His eyes were fixed on a single door behind me.

"Come on now!" he called after me.
I wouldn't budge.
"Oh, this isn't a game now!" he said, as he resorted to magic to push me through the doorway.

It took only a second for my eyes to adjust to the pitch black darkness, but once they did, the sight I saw inside that room terrified me as much as what was outside. The Doctor and I now floated, suspended several feet by magic, above a mob of Other Ponies. Their moans and crying added onto the stench of month-old filth and decaying corpses they stood on. I could see these ponies' bodies were half-dead, but their souls tortured and ripped to pieces. The floor, again, seemed to be non-existent, as the ponies stood on piles of hides and bones of their comrades.
Some reached out and called to me, "run away!".
Another one cried, "please kill me!".

The Doctor laughed at their pleas. "Which pony wants to play with me next?" He used his magic to sort through the Other Ponies, toppling over many and forcing even more below the surface in the process. I could hear the screams of a pony who fell under, as if it were quicksand. Green magic drowned him deeper into the sea of decay until he was no longer able to be seen. Nopony tried to rescue him and the echoes of his screams soon stopped.

The Doctor finally decided upon his victim, a baby blue colt, no older than I was. He raised the colt up into the air and left him hanging like a puppet. The colt was mute with fear and hatred. I could see in his eyes the true enmity for the Doctor.
The Doctor raised his knife, holding it blade down, and brought down the full force of his forearm down into the colt's eyes.

"AGHHHH!"

The colt's eyes exploded into blood and mush instantaneously. The Doctor released his grip on the blade, allowing it to soak in the colt's eye socket. Then, the Doctor continued his 'game'. He took the blade once again and began to slowly twist it while forcing it to dig deeper into his skull. I heard the splattering of the colt's brain being blended while still alive. Soon, a gray matter started to drip out of his nostril and mouth. Blood dripped down like a stream from his eye down onto the ponies below. The Doctor twisted the blade faster and faster, deeper into his head.

I snapped out of shock and found my voice, "STOP!"

The Doctor looked at me, as if I were insane. "What's the matter, silly filly?" In anger, he hoofed the base of the blade hard. The blade cracked through the back of the colt's head. "Oh, look what you made me do. I was going to have a bit more fun with him."
He released the colt, dropping him several feet back into the pit.

I couldn't handle it anymore. I couldn't watch to see ponies suffer like this. "Stop killing them! They're still ponies!"

He laughed and laughed, like a maniac. "Are you crazy? The Other Ponies are nothing more than filth, scum, parasprites, trash of our beautiful world."

"No. No. No!" I yelled in anger, "the Other Ponies can feel and think like us unicorns! They're ponies too!" I was thinking about the mare last night. She was like us. She knew about pain. Her friends did too when they mourned for her death.

The Doctor laughed until he began to choke. "Other Ponies that are like us? They're all brutes! What a great joke!"

Then he stopped laughing. He slowly turned his head towards me, inch by inch, and had a grin stretched across his whole face. "You're not joking, are you?"
His voice had changed completely, from cheery to something cold and dead.

His smile immediately disappeared and was replaced by a contorted frown. He looked me in the eye, leaned forward, and whispered into my ear.

"Let's test that."

The magic holding me in the air disappeared. I felt myself falling into the abyss below closer to the odors. I landed on half a carcass of a Pegasus Pony, rolled over and landed headfirst into the ribcage of another. The blood encrusted inside was green and blue from aged mold. Organs were bloated from decomposition and were the consistency of gelatin. I pulled myself out in a hurry, scratching myself with the bones in the process. But, before I could tend to my wounds, I was amazed by what I saw. The room was dim, yes, but it was unmistakable. Hundreds, if not a thousand, stallions stood in a circle around me.

"I've put a spell of you to make sure you won't die!" I heard the Doctor yell in his singsong voice. "And another so you'll be awake for the whole thing."

The door shut. The only light came from the faint green glow of the Doctor's enchantment.

Awake? For what?

Then it hit me. A sharp pain burned between my hindlegs. It was more intense than any other pain I could have imagined. A stallion behind me pinned me against the carcass floor, while forcefully mounting my youthful marehood. I struggled to escape, but it was hopeless. "Stop it! Please stop it!" I begged. He didn't stop, and instead sped up his pace.

Then somepony hoofed me in the face. "Shut up, Unicorn slime."
Somepony jammed something into my mouth. It slid all the way down my throat and choked me.

I couldn't scream, but even if I could, nopony would have heard. The two stallions continued to pleasure themselves with me. I was just an enemy, a unicorn, the one who forced them into this hell. They continued, faster and faster. The physical pain wasn't the worst part. It was the emotional pain of being humiliated and forced to pleasure the stallions. They trusted once more and gave a pleased grunt, and then quickly slipped out of me, retreating back into the crowds.
In the darkness, everything smells stronger. I smelled something new, fowl and disgusting. It was sloshing out my throat and squirting out from between my legs. It felt disgusting. It tasted like filth. It made me feel powerless, weak.
A second later, another pair of hooves grabbed onto my flank. Then the pain returned. Another stallion mounted me. They repeated this process countless times, each time worse than the first. I would start to shed tears, but they threatened if I did that they would only go faster and harder.
Loads of the slime filled my lungs, and I couldn't breathe anymore. I begged and begged for the stallions to stop.

"Please. Please. I don't want to die."

After the tenth set of stallions, I rolled over on my side and vomited a gallon of their fluid.

I begged once more, "Please, have mercy."

One hoofed my face and spat at me. Surrounding me were the shadows of ponies, cold, dead, and merciless.

Another pair of hooves grabbed onto my flank.

The Doctor didn't lie. His magic made sure I lived. But sometimes, I wish it hadn't.