0 someone who claims to communicate with the dead in order to discover what is going to happen in the future, or who is involved in black magic (= magic used for bad purposes):
They're crazed necromancers, communicating with the spirits of the dead in order to influence the future.
It was a sin for a Catholic to consult a witch or a necromancer.
They fear her because she can control them with her necromancer powers.
That gives far too much importance to those sophisticators and necromancers.
The management of the economy of this country is an art and one needs the arcane devices of the necromancer to succeed.
Therefore, we have all these modern necromancers advocating a change from one form of currency to another.
Statistical necromancers will study the entrails of chickens to decide what inflation will be like in a year's time to place a predetermined straitjacket on the economy.
Her husband was known as a necromancer and astrologer.