For eight years since its defeat at the hooves of the element bearers, the Nightmare lingered in the icy cold tomb of the ancient castle. Nopony dared explore it, and nopony noticed the black corruption seeping into the castle’s walls like a cancer on a dying host. The Nightmare was strong now, and it was plotting. Finally, its plans were coming to fruition. Soon, it would reap its just vengeance on the ponies who had sealed it away and Ponyville would fall. The rest of the world would soon follow.