Universal Orlando Resort has revealed when the evil side of Wizarding World of Harry Potter will come to pass in a new nighttime show. The Dark Arts at Hogwarts Castle show will begin on Sept. 14 and run through November on select nights, said the Universal Close-Up blog. In this new show, the iconic Hogwarts Castle will be used as a canvas for a new projection show where all the evil creatures, wizards and witches take over the building. Unique to Orlando is Death Eaters — the villainous followers of Lord Voldemort — who will roam Hogsmeade practicing the Dark Arts where guests congregate.