A trio of Arizona “exorcists” has ventured to England to fight what it describes as the endorsement of satanic elements in J.K. Rowling’s Harry Potter book series.

“Harry is using this magic for good,” 18-year-old Brynne Larson explains in video posted by the Daily Mail on Monday. “So here we have the dangerous idea that you can use this magic for good or bad. When in reality, all magic is bad ’cause you’re getting your power from Satan.”

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Larson and friends Tess and Savannah Scherkenback will be profiled in a BBC special on Friday discussing both their longtime friendship and their training by Larson’s father, Rev. Bob Larson, who claims to have performed 15,000 exorcisms. The BBC reported that Bob Larson asks for donations of $200 for each exorcism.

The three girls claim in the video that the popularity of Rowling’s books marked the culmination of a rise in occult activity in England.

“The spells and things that you’re reading in the Harry Potter books, those aren’t just something that are made up,” 18-year-old Tess Scherkenback says. “Those are actual spells. Those are things that came from witchcraft books.”

Rowling’s series will be re-released this year with new book covers to commemorate its 15th anniversary.

Watch the three young “exorcists” describe why England needs them, in video posted by the Mail, below.