Twilight discovers the truth behind Pinkie Pie's mysterious abilities in a way that she would have preferred avoiding... death.

Gale gets a shady-looking game from an old man, and eventually finds that he has something much darker on his hooves...

Ventus, in a final ditch effort to save Equestria, travels back in time to stop the terrorizing of Unicornia. But he is completely unprepared for what he finds hidden within the folds of history...

In Equestria's most desperate hour, a mysterious hooded pony offers Twilight the most powerful, but most dangerous and mind-corrupting type of magic; Dark Magic.