Starlight Glimmer with Mane 6 in a unknown Cave where the Cave you seen Starlight Glimmer escapes. In that Cave there a secret ground where Starlight Glimmer kills her previous Pony who got equality. Starlight Glimmer who experiments the weak Ponies that have lost there Cutie Mark turn into equal Cutie Mark. In that Equal Cutie Mark there a dark magic inside of it very dangerous it was done it experiment when Luna banished from the moon some says a Unicorn Pony died and become a killer of the cave. Why they called killer of the cave because she kills thousand of Pony miners. After years finding a cure but it fail the only choice they made abandoned town and cancel making the tracks of the town. A thousand years later one Unicorn try to discover the myths of Killer of the Cave when she go the abandoned town it was a lot of broken windows and broken building when she heard a loud noise she check around the town. Then she found a hoof print with blood she follow the hoof print which lead to a cave when she entered the cave she heard a deeply Mare voice. She had become possess of the killer of the cave after she entered another Pony Body the other Unicorn got shock she is seeing horrifying vision that she cannot blink she scream loudly she was passed out. When she woke up she said "Thank Celestia it just a dream" then she hears another deeply Mare voice she was shock hearing that voice she run as fast she could to never go that place again.
When she's return to her home she can barely hear another deeply Mare voice her heart beating so fast and seeing another horrifying vision she scream loudly she couldn't escape the horrifying Nightmare she try to attempted call somepony but fail it was too late she have no control of her body like someone who is trying steal my soul. After that horrifying nightmare she can barely walk still but her body feels shivering so she went to the hospital as fast she could. When she got to the hospital nopony was there except for a nurse and ask the nurse she ask "Excuse me Nurse" the Nurse turn her head who was calling me she *gasp* saw a weak purple Pony who is covered blood she ask "Oh My Celestia! Are you alright?" Purple Pony reply "I need a doc-" she collapsed suddenly a Doctor spotted the collapse he run as fast he could to investigate what happen "What happen here?" The Doctor Said, the Nurse scream for unknown reason she said by an unknown language like she was possess by a demon the Doctor couldn't understand language but suddenly he hear a unknown whisper talk talking of "I'm Back" then suddenly the Doctor got black out but he can hear sound like he was walking. Soon after that he hear a strong wind like he's on a tall buildings he feel another feeling he was climbing. Soon after that his body feels like he was floating suddenly his eye have wide open and shock he scream for his fall of his death he died. After that fall the Nurse continue to scream then suddenly a creepy dead cave Unicorn appear her eye vision suddenly her eye explode. After these 2 Ponies died in the hospital a black smoke shape a Mare which suddenly heals Purple Pony she said in Creepy voice "Finally I'm free! After all these year I can feel my death in my stomach" *Evil Laugh* Purple Pony woke up she feels no pain in her body but she can't move after that Evil laugh "It's time to go back to kill my slave" Purple Pony *gasp* then suddenly a black magic she passed out.
While she was passed out she was taken to the another hospital she can barely hear Ponies talking but her body couldn't move or couldn't speak she can only do is hearing Ponies talking. Suddenly she sees herself she walk closely to it she was standing still silently suddenly another voice she heard saying "This is your Future..... Starlight Glimmer" she was shock "How did she know my name" suddenly an unknown sound coming somewhere like someone who is screaming in agony suddenly she teleport into a cave with full of blood, equal sign Cutie Mark, Pegasus wing and a Unicorn horn. She nearly Puke of this horrifying mess she hear a scream she listen where it's coming from when she heard the scream in that room when she peek the room what's happening she sees a horrifying mess she Puke because of the removal organs and dead Ponies. She run as fast she could to escape to this murdered place she suddenly bump into the murder when she looked at the murderer it was herself as a murderer she got shock seeing herself. Suddenly a scary face pop up of her eye vision she suddenly woke up she said "Another horrible Nightmare...." when she tries get up she feels pain of her body the only way she can do is just wait the Doctor if I'm feeling well. After that the Doctor came to check the patient "How are you feeling? Starlight Glimmer...." The Doctor said. Starlight Glimmer replies "Am I going to be fine Doctor?" The Doctor reply "Well your gonna be fine you'll just need some rest" Starlight Glimmer replies "OK Thank You so much" the Doctor reply "No Problem just have some rest" the Doctor left the room and Starlight Glimmer took a rest for a while.
After hours later an unknown black smoke Mare enters the room she whisper on a creepy voice "This is just the beginning... Starlight Glimmer" she enters Starlight Glimmer body. The Doctor enters the room to check the patient he hears demonic voice of on Starlight Glimmer body saying "Your going to die" his eye have black out but he can hear like he was carrying somewhere suddenly his eye have open and he got drop in a cave with tons of Pony Skeleton he sees a creepy cave Unicorn crying he walk slowly because of the skeleton. He sneak closely to the crying Unicorn, the Unicorn Pony turn her head on a demonic way she jump front of his eye vision she rips off the Doctor limb by limb and then she ate the Doctor head which later he died. After that killing the black smoke Mare lift Starlight Glimmer then heals her body and she whispers in a unknown language. The black smoke Mare carries Starlight Glimmer to her house and she puts her on her bed she touch Starlight Glimmer horn and transferred her magic to Starlight Glimmer. After that transferred black smoke Mare got weak and starting fade away her last word says "My Soul Is Going To Be A Nightmare... For Her" she *Evil Laugh* and she disappear.