depends on what you believe.
if you look at religion from another perspective you might think its kind of silly and made up.
religion exists so people dont get death anxiety.

"im going to create man and women with origional sin. then im going to impregnate a woman with myself as her child so i can be born. Once alive, i will kill myself as a sacrifice to myself to save you from the sin i origionally condemned you to"

but anyways to answer your question
the bible does forbid mediums and claims in the old testament that  God will punish those who go to mediums by allowing everything they say to be true.  (or something of that nature)  if youre really interested you should read God's old laws.

Preachers have been known to prophisi, and gifts are just that. If you partake in immoral activities  then you deal with consequenses. If you reflect love and light (God) what could be wrong with that?