AUTHOR NOTE Hey everypony! Ive finally written the Grimdark story i promised you. There will be some Cupcakes shoutouts, so if you haven't read Cupcakes, please do. Comments will be very much appreciated!
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Rainbow Dash's body was found in the Sugarcube Corner's basement by the Cakes. Most of the organs were missing, the wings had been torn off, and the face and cutiemark had been cut off. The Royal Guards were alerted and Pinkie was caught and imprisoned. Even though Pinkie said she was sorry, her expression said a different story. A week after the discovery, a funeral was held in honor of the dead pegasus. She was buried alongside her parents, who had died of plague. That was the day when all of Ponyville and Cloudsdale mourned. It was also the day that Rarity's nightmares began.
The white unicorn had gone home after the procession, just like everypony else. By the time she was at the boutique, it was already late, so she just cantered to her bed. As soon as she closed her eyes, she began to dream.
She saw herself sitting in the middle of her boutique, shrouded by fog. The fog slowly began to clear, revealing a mirror right in front of her.
What am I doing here? she thought.
Rarity's reflection began to move, which was quite odd, because the mare herself hadn't moved a muscle.
"Bonjour, madamemoiselle. It is an absolute pleasure to meet you." The reflection spoke in a reptilic voice, like a snake.
The voice hypnotized Rarity, made her feel lightheaded.
"I brought you here for a motivational speech. Listen, darling, do you not miss your colorful friend?"
"Why yes, I do."
"Well, darling, everypony in Equestria adores your dresses. You can sew the stars into fabric. You can weave a jewel into a gown. Don't you think it is time to go one step further?"
Rarity was baffled.
"What do you mean?"
The reflection shone a smirk.
"You can weave fabric into clothes. Do you not think you can weave the very fabric of life?"
The unicorn once more repeated her question. Upon hearing this, the reflection seemed to become irrate.
"You can bring Rainbow Dash back to life. You just need to collect bits and pieces of other ponies. Eyes, wings, lungs, blah, blah. Then, you just sew her together and blast her with magic, and voila!"
Rarity blinked and was about to reply when suddenly, the fog darkened and thickened.
"She must've heard me. I must go, but we will meet again. "
The snow coloured unicorn was still stuck in place.
"What do I do? How do I begin?"
The reflection's eyes glowed in a shade of draconic green.
"To meet your fate,
to the graves you must head,
talk to hate,
and unveil the dead."
As soon as the last letter was spoken, the mist thickened even more, swallowing Rarity.

The unicorn woke up with a yelp. Her sapphire eyes were blinded by the warm Autumn sunlight.
It was all just a dream
Rarity had decided to call her reflection Marrity. She stood shakily on her hooves as she recalled Marrity's message.
She sighed and decided to work on the instructions after sunset.
***
Rarity levitated her shovel as she passed in front of old and weathered tombs. Her purple mane bounced with every step she took. Her eyes glowed under the full moon. Once she had reached Rainbow Dash's grave, she began to dig, being careful to avoid the filthy earth. Suddenly, she heard a deep BANG!
Rarity's sapphire eyes lit up as she peered into the newly dug hole.
There you are, my little gem.