In the grim darkness of the 41 millennium, there is only war. War, and Friendship.

When the Ruinous Powers of the Warhammer 40,000 universe take an intrest in Equestria, you know nothing good is going to come out of it. When Celestia is struck down by an agent of Tzeentch, the land of Equestria will soon find itself locked in combat with it's own denizens as Chaos itself begins to corrupt the land. Discord was difficult enough, but now our little ponies will have to face four gods of chaos at the same time.

A (Comedic/Dark/Adventurous) Warhammer 40,000 and Friendship is Magic crossover. Here be fanon, canon, and headcanon of both series.