When an insidious evil threatens the Crystal Empire, the Princesses must call upon the most unlikely pony; Sombra. Can he overcome his own darkness in order to save the empire from a far worse one?
Lately, Princess Cadance has been feeling inadequate. She's spoken of this briefly to Twilight Sparkle but her longing for a grand adventure is really starting to get to her as are the thoughts that she isn't doing all that she can.
Twilight has failed, or rather, she has succeeded. Her darkness is her power, and together with her husband, Queen Twilight has a new plan for all of Equis. War is brewing as the black castle rises, and hope is now but a happy memory.
Sombra is by no means an easy opponent. He is a manipulative wild card who has cheated death twice, and seeks to do so one more time. But, how many ponies can cheat death forever?
When two unlikely ponies, Luna and Sombra, meet beneath the silver moon, will their love be everlasting, or will the darkness lurking in the Crystal Empire succeed in destroying them?
Twilight Sparkle traverses the Arctic with Sombra as she tries to learn about the mystery that was Starswirl the Bearded's life. But are these secrets what she thought they would be? And just who was Starswirl anyway? Sombra seems to know, but why?
Twilight learns of Sombra's past, and finds him alive but weakened. She decides to learn how to use his Dark Magic for Good, by taking him back to Ponyville.
After recent events, Cadance is pretty sure that she doesn't want to go another adventure for a while. Except that you don't have to leave your castle to have an adventure. Especially if said castle is haunted.
Princess Luna disappears from Equestria with hopes of saving the world and is accompanied by the enigmatic Sombra. Meanwhile, Celestia tries to bury secrets as immortal as she is and Cadance must choose her loyalties carefully...
For a thousand years, the Code of Harmony has ruled Equestria, and the Code of Dissonance has sabotaged its works at every turn. Now the war for control over the land will come to a head, and one unicorn's decision may decide the fate of all.