The mystery of the Elements (Mlp)

Fire Rainbow is an alicorn with a broken horn and the protector of one of the four element stones. The so called flamestone. One day though, she and her two best friends accidentely open a portal to a parallel universe. They and some others get sucked in and have to face with their doppelgängers in that world. Their other selfes are the rulers of the land, that destroy everycreature who goes up against them. They have to find the counterparts of 6 items very dear to them, like in the case of Fire the flamestone. Soon the six ponys realise though, how difficult that can be in a world where everyone fears, hates or worships you.

Will they be able to succeed even if they have to go up against their evil selfes?

(Hi, my name is FireRainbowMlp/FireArt. I made the picture to this story, because I wanted to have a self made filmposter. And now I wanted to write a story to it :) The picture might not fit the story for 100% once it is finished though.
I hope you'll like my story. Sorry if my english isn't perfect. If you find mistakes, please correct me in the comments. ^^
I am excited to write this. Have a great day everyone and much fun reading this!)