Law of mana and taboo

Mana is an example of animatism, that spirit can flow in and out of a person's body. that i heard a case in china, a woman charges people to come to her house and talk to dead relatives for them. specifically, she ask them for the dead relative's informations, and then she would "let the dead person's spirit rest on her", and she would talk ( the dead people can talk) to the dead people's relatives now. Personally, i do not believe that. even if it is true, God must've hates it. they received power from the evil spirits, i belileve. becasue one woman in china told me once that she can see from her "third eye" , that she can see people's outside apearcnace, and analyze what they have been through. like whey were hit in the head or somethign when they were little, she can tell.
I think there are many instances where people just lie to others that they have that ability or die for it to make money. in such a complex society you never know if they are true or not true