For as long as man and other sentient creatures have existed, they have looked to god for an explanation of the world around them, in the hopes that when they die, they will be rewarded with eternal life in heaven in return for their faith and devotion. Turns, out there is such a place. Equestria. That's right. The magical land of ponies is where all dead sentient creatures go. Reincarnated as the other species of Equestria. Gryphons, zebras, even hydras... Thought to be a place safe from other worlds, only a small standing army is spread thin across the great nation, and now, as a hulking behemoth crosses into the usually peaceful world, all of the creatures of the planet Equis must form an uneasy alliance to defeat a juggernaut that will not rest until he has his revenge on those who had forsaken him. Run, for Nautilus has arrived.