The army that Gerald raised near the tombs was powerful after he had meditated and called the hordes from the rest of the Ashen Plains. Zombies poured through the ash like a fish swimming through water towards the tombs. Skeletons awoke from their slumber, and were awakened by other skeletons who were ordered to dig for their comrades. The numbers swelling and the skeletal commanders were named. They were getting organized and prepared for the nightly marches that would be ensuring soon enough. Despite her lack of assurances, Arianna was definitely an aid in the summoning of the undead. The curses of the land also aided in the summoning.