Shining Armor and Cadence's spell reveals something completely unexpected as it expels Chrysalis and her changelings out of Canterlot: A secret kept from everypony for several years...

Now with a TV Tropes page! Warning: Will Contain spoilers.

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?

Princess Cadence is a lonely filly who has been shielded and protected all her life as a princess and member of the dwindling race of Sacred Alicorns. She longs for a friend her age to play with, and as a young teen she is sent to stay in Canterlot where her Aunt Celestia would personally mentor her in developing her magic. There she hopes to finally have the freedom she longs for and find somepony to be her friend. Instead, she is asked to foal sit for one of her aunt's royal adviser's fillies who may just be as lonely and reclusive as she.

This is the story of how Princess Cadence learns that the ability to give love cannot be complete without finding love for yourself, and sometimes it is found when you least expect it.