Harry Potter and the 19lb box of magic Hogwarts may have closed its doors for ever and Harry, Ron and Hermione may no longer be making magic, but Potter-mania continues, or so Warner Brothers hopes. Yesterday, the film studio released its £179, limited-edition Harry Potter Wizards Collection, the most comprehensive Potter box set ever. It contains 31 discs, includes all of the films, more than 37 hours of special features and weighs a Hagridian 19lb.