As Twilight was send to the dungeon under the castle to most likely die. She hears something within the dark whispering, the whisper of a demonic being. Promising her revenge on the intruder. Will Twilight be able to hold back killing everything she holds dear or will she fall to the dark and kill everyone?

Twilight looked around seeing crystals covering the walls around her, while one face showing on one of the walls mocking her till tears. Telling her how she would kill everyone Twilight loved. While she could do nothing, while bringing Twilight to more tears and begging. As Twilight collapse on the floor. The face vanish leaving Twilight in the dark with her own thoughts to most likely die, when she hears a voice:

'Want… help?... 'The voice said making her ears perk up and her eyes look around, the voice was low maybe too low to be nearby but it didn't matter 'hallo?' she said 'is anypony there?' her asking were meet with silence which made her sad and scared. 'You want help?' the voice asked again this time just behind her. She flipped around and saw only darkness. *you have finally gone insane* She thought to herself as she shakes her head. 'You have not gone insane yet my dear' the voice spoke again making her jump. She looked around but saw nothing to identify the voice, 'you look like you could use some help' the voice spoke again sending a shiver down her back. She nodded 'yes' she said in defeat as she just wanted some help to get out and warn her friends. At the same time she thought that the picture of her friends turning their back on her just made her sad and angry. She wanted to help so much but they had turned her away. This made her break down into crying again. 'Please whoever is there, please help me' she cried, almost yelling it out with sadness and anger. Soddenly a piece of paper appeared on the floor with a line on. 'Sign this paper with your blood and I'll help you' the voice said. She looked at the paper unsure of what to do, she sat there a few minutes before yelping in pain. She looked down at her hoof and saw it was covered in blood, having accidently cut her hoof on a crystal. She looked at the bleed stained hoof then the paper, before looking back at her hoof. She then leaned in and placed the bloody hoof on the paper and let out a breath. Just as she lifted her hoof she felt something knocking her back while a feeling of something forcing itself inside her made it clear that something was here and alive. After a few minutes of pain it stopped leaving her panting heavy and her muscles sore, before she passed out.

Twilight woke up some time later, feeling all sore. She looked around and saw it had gotten brighter in the cavern. Her head snapped around as she heard a crying nearby and went to investigate. she came by a corner of the wall and looked around the it and saw the same o´pony that had send her there to most likely die, but this one looked different. Twilight walked closer without making a sound. as she came up beside the pony laying there crying she could see that it wasn't the one that had send her there. She smiled a bit as she remembered her foalsitter laying there and leaned down giving her the biggest hug ever. The mare in question jumped a few feet and looked around scared. She calmed down as she saw Twilight there by her side and hugged her back 'oh Twilight it's so good seeing you again just wished it was under better times' she said before looking down into the ground with a sad face.

'don't worry Cadence I'll get us out of here' Twilight said as she illuminated the place with her magic. Suddenly she felt something moving inside her making her sway from side to side before getting a hold of herself. 'Do not resist' the voice from earlier said making Twilight jump and look around worried. 'Stand back a little Cadence' she said and Cadence stepped not just a little but a few feet away from Twilight just to make sure. Twilight began shaking in pain as she felt something moving around inside her trying to find a way out. She dropped down to her knees as her body became covered in some kind of smoke/mist and two evil and demonic looking snake heads both which had some long sharp looking blades along their ''body'' which apparently is connected to Twilight's back. Twilight in the meantime was screaming out in pain, tears rolling down her face making her fur and the ground under her wet. After a few minutes it all stopped and Twilight stood up again as if nothing had happened. She stood there and admired the two snake heads and saw how they reacted to her and her touch, a touch SHE herself could feel through them. Twilight smiled and looked back at Cadence who was backing away slowly. Twilight looked at Cadence with a look of victory 'come Cadence lets get rid of the imposter' Twilight said as she grabbed Cadence and ran towards the exit