The Zerg have found an excellent planet on which to pursue their endless quest for perfection; environmental extremes, lethal and exotic fauna, a sapient species with psionic potential to rival the Protoss, what better place to drive the Swarm's evolution? However, Twilight Sparkle isn't willing to just let them walk all over Equestria, and a large cache of self-replicating alien technology says they're not taking over without a fight.