I guess that would be the next best thing to someone who can either create a barrier, or can otherwise resist magic.

[ There are forms of magic that cancel out other forms of magic in his world. Ultear's orb was a good example of one. As for barriers... he only really knows of one person who can create a barrier strong enough to contain him, and Mavis Vermillion isn't here. That he knows of, anyway. He can't see or hear her, but her magical presence is hard to miss after spending about a century around it. ]