Deep in the realm of Tartarus, there laid dormant a spider like creature. it was hungry but its source of food was gone. Once Celestia entered with her unicorn knighs came to put forth trial another criminal, they awaken the creature. It return to equestria were its food source was abundant. Magic. as this creature spreads rapidly, Equestria must find a way to exterminate these parasites, as they slowly devour the land.