“Like every vampire, I’m invisible to magical visual probing and scanning; that is, to a detecting spell. A vampire may be tracked using an analytical spell, from close up, but it is not possible to detect a vampire with a remote, scanning spell. The detection will report that there’s no one there. Thus only a sorcerer could be mistaken regarding us: to register four people, where there were actually five; that is, four people and one vampire.”
