The defeat of King Sombra is only the beginning of Celestia and Luna's troubles when they discover his daughter, Nightshade, also has strong magic. Will they manage to keep her good, or will she succumb to the same madness as her father?

Based on the songs 'Rainbow Factory' and 'Awoken' by Woodentoaster. Static Shimmer barely escapes the Rainbow Factory with her life, but is the help she receives from a pony who is to be trusted?