It all started a very long time ago, when the world of Equestria was still young, and the Princess Luna still stood by her sister Princess Celestia's side, there had been one other princess, her name was Everfree. She was far less important than the other sisters in the eyes of other ponies of the land as her power was to give free will to any and all items and objects... and in a land ruled and controlled by ponies with many unique skills and abilities, her power was close to useless.
Feeling insignificant and unappreciated, Princess Everfree fled from the castle of the sisters and flew to uncharted lands. After finding a bare, beautiful and uninhabited spot, the princess had decided that this place would be absolutely perfect for her own little kingdom. A place where everything would do their tasks on their own, so that all of the hard working ponies that lived there and in Equestria would have more time for themselves and their own lives. The plants would grow on their own with out needing to be tended to, the animals would know how to take care of themselves no one to help them, the clouds would come and go on their own, not needing any pegasi ponies to move them with their schedule. All races of ponies would love it here. As thought the Princess. They would be able to frolic and play and just not have to worry about the daily struggles like they had to while in Equestria!
Having exited herself about her own ideas, the princess used her magic, the magic of free will, to engulf the uninhabited land. Soon after the magic had reached the land, the land had started to sprout lush grass, bushes and beautiful trees. Flowers of all shapes, kinds and colors would blossom and bloom. Soon enough, animals of all kinds that had never been seen before in Equestria had started appearing within the forest... Being pleased with the result, the princess had invited some ponies to come and live in her newly created place, The Everfree forest as she called it. At first all of the races of ponies had absolutely loved it, having no true responsibilities while being within the boundaries of the forest. It was new and exciting and there was all ways much more for the ponies to explore, while you were there, you never knew what the next day would bring... but as the time went on, the land started sprouting some weird things, dangerous things... Hostile animals that had no reason to befriend ponies and strange plants that would have undesired effects. The ponies started feeling uneasy and eventually started fearing the unknown... The land grew on it's own, so there was no telling what lurked behind the bushes...
And just as the fear of the forest was at it's peak, the sun did not rise one day. Believing that this was the result of this strange land, the ponies had fled back to Equestria, telling every pony that the Everfree lands were ones to be feared and no pony should ever go there.
Princess Everfree was heartbroken. Her beautiful land and her well-meaning wish turned for the worst... She did not want the land to become dangerous, but with a mind of it's own now, the land just kept doing as it wished, with the help of her magic... At a certain point the princess had wanted to leave her own land, in hopes that it will lose its own free will and everything would come back to normal once her magic wears off, but the land, that was now a great big lush, dangerous forest, refused to let the princess leave. Her magic had made the forest too strong for the princess to leave. It needed the princess's magic to be able to continue growing and evolving on it's own. The forest had imprisoned Princess Everfree deep underground, in the very center of the forest, her magic continuing to provide live and power to the lands above her. The Prison was shaped in such a way, that if the forest were to die, the prison would collapse on the princess itself, ending her life. Her plan for a perfect place where all races of ponies could live in perfect harmony, had backfired.
There was no way for the princess to escape the prison, no way for her to be saved, no pony to save her. She had been trapped by her own creation. Having no other choice but to comply to the forests will, and resume giving the forest it's much needed magic... were she to refuse, she would die. The fear of death was what is keeping the Everfree forest alive and well to this very day.
Princess Everfree had no way to escape, without ending her own life. The forest had drained her of her magic, almost to when she would die. Being an immortal Alicorn, She had no need for food like the normal ponies. Being so weak, the collapsing of the prison would be life threatening. There was nothing she could do to save her self. She was trapped.
As the time passed by, the memory of the over looked princess faded, but the fear for the land she had created had stayed. The princess was forgotten, even by her own sisters. The ponies who loved her and were with her no matter what happened with the forest, were gone. They had long died before then. The forest had taken away the one thing that the un-loved princess deserved, Friendship and Family. Forgotten and left to her miserable fate, The Princess Everfree has become simply... never free...
If one day, some pony, any pony is to reach the very center of the once beautiful Everfree forest, while under a full moon, you are still hear the sounds of her torture, the torture her own magic had placed upon her. You can hear her whisper, "Save me." The legend of Princess Everfree has been reborn!
Long live the Princess Everfree!