I believe in magic, though I'm skeptical of such things. But I've always stayed away from Ouija boards, and, though I consider psychics to be relatively harmless, I give that stuff a wide berth, too. I may be skeptical, but no sense tempting fate.
I can't point to it in the Bible, but according to Jesus Christ, "magic" (though it's not called by that name in the Bible), in the "Merlin" or "Harry Potter" sense, I guess you could say, does indeed exist. He instructed His followers to have nothing to do with it or its purveyors. So I guess, if I'm to believe in the Word, I have to believe in magic, too.
I've seen some pretty intense stuff performed by "illusionists", and I really do have to wonder sometimes how it's done within the laws of physics.
Does anyone consider David Blaine to be a real magician? I'd call him more of a stuntman. A little willpower, a modicum of endurance, and anyone could lock themselves in a glass case for a month or hold their breath for a long time. That's not a trick.