In an interview with CBN Richard Abanes, an Evangelical journalist remarked that one of the easiest ways to know whether a fantasy book or film has real world magic in it is to just ask a simple question,
can my child find information in a library that will enable them to replicate what they are reading/seeing in the film or the book?
If you go to the Chronicles of Narnia and the Lord of the Rings what you see is story magic and imagination, but if you go to something like Harry Potter, you find reference to astrology, clairvoyance and numerology etc...
It takes seconds to go into a bookstore or library and get books on that stuff investigating it, researching it and doing it.