King Sombra returns to Equestria and he plans to get his revenge on the Princess of Friendship. However, unlike every other villain before him, Sombra has a plan...
Tambelon Ancient Dark City Grogar's Stronghold formerly the Capital of Equestria Now Locked in the Dark Dimension but its inhabitants are waiting for the day when they can return to Equestria!.
Twilight Sparkle is about to be crowned ruler of Equestria, but on this day of all days, the peace is disturbed by the ultimate threat: Emperor Grogar and the Horses of the Apocalypse.
Chrysalis and Tirek are soon to be sentence to death for the murder of Spike The Dragon. Raven Inkwell steps in to defend them and prove their innocence and expose the truth.