Necromancers synonyms

his aid was "compelled" by the magicians and necromancers to fetch the gods and entertain them with food (especially in the ceremony of gazing into the bowl of oil), and he is invoked by them sometimes as the "Good Ox-herd."

Psychics have been around since ancient times, and they've existed under many names including spiritualists, necromancers, mediums, clairvoyants or shamans.

Oh, and sorcerers, hedge witches and necromancers (those who draw their sorcerous powers from the dead and dying).