necromantic

/ˌnɛkroʊˈmæntɪk/
adjective
  1. Relating to the practice of communicating with the dead, especially to predict the future.
    • The movie's villain used necromantic powers to raise an army of skeletons.
    • The old book contained necromantic spells for summoning spirits.
    • She had a necromantic fascination with ouija boards and séances.