On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

Equestria is a land of magic and harmony, a peaceful realm ruled by immortal and benevolent monarchs. At what cost is this possible?

Following the discovery of a strange and powerful device, Twilight Sparkle is whisked away to the edges of a land she thought she knew so well. Here, surrounded by ponies whose very existences have been kept secret, she must contend with vicious enemies, hostile allies, and the truth.

Chapters 1-16 edited by KiltedKey

For most of Applejack's life, she didn't know what she was. True, she understood who she was well enough.
But ponies don't change shapes, nor do they get strength from love.
Applejack never thought too hard on it... until the events of a certain wedding brought about some harsh realizations.
Now, with Equestria still reeling from the surprise attack, will Applejack manage to come to terms with what she is? Will she even be able to keep her secret safe?
For if the royal guards don't get her first, the conspirators in the shadows just might...

Image provided by Heilos -

Luna, Princess of the Night, feels like she's under quarantine in Canterlot. Apart from Celestia and her personal aid, Scrivener Blooms, Luna is treated like Nightmare Moon by the residents of the castle. After a journey to Ponyville, however, Luna takes an interest in attempting to make friends and begins to yearn to see more of the world and to prove that she is back in control of herself and regaining her old strength.

A mix of romance, high fantasy, and magic, the story features the power of friendship, sarcastic wit, and adventure against darkness driven by Luna's brash, courageous spirit.

The first story of the Nátta Edda, and beginning of the Fimbulvetr Trilogy.

This story is a sequel to Shadow of the Sun

Story 5 of the Savage Skies series:
Autumn has arrived in Ponyville. The harvest is in full swing and all is as it should be. After enduring the trials of the past few months, Dawn Lightwing is looking forward to what promises, hopefully, to be a peaceful season before a tumultuous winter. However, the coming season has the unwelcome effect of bringing his enemies closer than he feared. However, he is fortunate to have a loving family, good friends, and somepony who is maybe more than just a friend.
The series begins in Foal of the Forest.
Now with a TV Tropes page.

All of Equestria is united in celebration for the return of their beloved Princess Nightmare Moon. But when Celestia and everypony else recieve her she's skeletally starved, filthy, and very nearly dead. Meanwhile, while everypony's eye is turned, a lusty Blueblood pursues Twilight Sparkle, intent on adding her bloodline to his own so his family might step closer to godhood. (Alternate Universe, there never was a Princess Luna)