An alien federation has begun an occupation of Equestria and its neighbor countries. Though promising technological wonders beyond imagining, the ponies' way of life and dependence on magic has been seen as an abominable front against the soundness of reason and science, and has forced the space-faring creature's hand in reforming Equestria in their own image. Determined to set things right, the princesses, along with a team of close friends seek out whatever resources they can to evict the aliens from their lands and return their beloved country to the state it had once been.

However how the power the princesses seek lies buried under a millennia of secrets engineered to hide a power so potent, its release could turn all Equis into a hellish warzone. How deep do these strange secrets delve? Into what unknowable darkness must the princesses travel? How far are Equestrias rulers willing to go to save the way of life they had so cherished? What slumbers beneath the Crystal Empire?

(AU Warhammer 40k/ AU MLP: FiM crossover. Set after Season 3, Season 4+ has not occurred. Any questions? Leave a comment or PM me, thank you.)