The necromancy is a lot similar like Santeria, Voodoo, Spiritualism, a medium that comunicates with the dead or alow the dead to take posetion of our body to comunicate with the living. The necromancy can bring a lot of enemies specially with the religious fanatics. There are a lot of good sites in the internet just do a search in yahoo, google, lycos or any other search engine. Look under necromancy, santeria, voodoo, spiritualism or even search for how to call the dead.