That's interesting, Neko, because there are lots of instances in the Bible where people OTHER than believers in the Judeo-Christian God do "magic" too, and there no particular suggestion that it's "wrong" that I can recall.
Eg, the scene in Exodus (I forget the reference, but I'm sure you know the bit I mean) where Moses goes to Pharoah's court and requests him to let the Israelites leave. Pharoah's magicians turn their staffs into snakes, and stuff like that. Of course, Moses counters them with better tricks, but there's absolutely no suggestion that what the others are doing is not "real magic".
I wonder how the fundamentalists would counter that?