The narrator soon discovers that the Vril-ya are descendants of an antediluvian civilization called the Ana, who live in networks of subterranean caverns linked by tunnels. Originally surface dwellers, they had fled underground thousands of years previously to escape a massive flood and gained greater power by facing and dominating the harsh conditions of the Earth. The place where the narrator descended housed 12,000 families, one of the largest groups. Their society was a technologically supported Utopia, chief among their tools being an "all-permeating fluid" called "Vril", a latent source of energy that the spiritually elevated hosts are able to master through training of their will, to a degree that depended on their hereditary constitution. This mastery gave them access to an extraordinary force that could be controlled at will. It is this fluid that the Vril-ya employed to communicate with the narrator. The powers of the Vril included the ability to heal, change, and destroy