    The dragon consented to have the Cloak placed over her, promising to be careful as she walked. Ron and Harry took a breath before casting a spell to make them less noticeable. Had it been possible, they would have spelled themselves to be invisible using a spell they’d found in one of the many books Hermione and Harry borrowed, but Ron’s wand had made that an impossibility when instead of turning Ron invisible, it had turned his skin bright green. 