Now remember the only thing i own are my OC's i don't own My Little Pony, Hasbro does.
Over a thousand years ago, in the Crystal Empire, before Nightmare Moon was locked away in the moon, there was another Princess of Equestria. She was the original Princess of the Crystal Empire, although over the years she disappeared from history books everywhere, not because she was forgotten, but to protect should King Sombre ever return.
Many know of how King Sombre was defeated, by the Crystal heart, but know one remembers just how it was created. Many believe it to be made from the emotions like love in the hearts of the ponies of the Crystal Empire, but there had to be a spark of a sort in order to create it.
That spark was created by that long lost princess, whose name has all but faded away. But not for long, for she is coming back, as to when? No one knows, except the Princess Celestia and Luna. For those two had been the best of friends with this list princess.
I know it's short but this is just the beginning of the Legend of this Lost Princess.