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?
When Tirek's brother Scorpan resurrects Sombra to use him against all of Equestria, Twilight and Co must not only retrieve Sombra from his clutches, but find a way to heal the damage that's been done to the former King. Can they save him in time?
