Harry Potter is the devil, or something like it, in Alexandre Aja’s dark fantasy Horns, adapted from Joe Hill’s novel. Daniel Radcliffe made his first trip to Comic-Con over the weekend in support of the Halloween Radius-TWC release. Check out the first trailer, in which Radcliffe’s Ig Perrish awakens after the murder of his girlfriend with demonic horns on his head and the power to manipulate the base impulses of the people around him: