Nyx is Nightmare Moon, reborn as her own being separate from Princess Luna. 2 years after her defeat at the hands of the Elements of Harmony, a cult calling themselves the Children of Nightmare performed a ritual meant to bring back Nightmare Moon using shreds of her essence that were peeled away from Princess Luna by the Elements power, along with using Twilight's blood as a catalyst to grant her life. Only the ritual was interrupted and the spell left incomplete. Twilight returned to the ritual site and discovered a black Alicorn Filly in the bushes and decided to take her in and find out if she really was Nightmare Moon or just merely looked like her.



Read Past Sins by Pen Stroke.