User blog comment:IamJakuhoRaikoben/Chapter 263: Crime Sorcière, Review./@comment-2106167-20111209222654/@comment-16344653-20111209224813

Yeah Rave Tail is a dark guild when Mirajane explained how they were a dark Guild separated from the Ballam Alliance.

If I'm not mistaken, that is something japanese do to their kids as punishment for doing something bad. (though it's not giant bricks)