I am assuming that Voldemort, about to attempt the subversion of a prophecy to destroy the world, is not standing around in a graveyard with Harry Potter, a recently reanimated Hermione with unicorn powers and a bunch of Death Eaters of at least slightly questionable loyalty without any detection spells raised at all.
I am assuming that Voldemort, about to attempt the subversion of a prophecy to destroy the world, is not standing around in a graveyard with Harry Potter, a recently reanimated Hermione with unicorn powers and a bunch of Death Eaters of at least slightly questionable loyalty without any detection spells raised at all.