But alas, Lucius and Dolores had outmanoeuvred Albus, and Harry had come within seconds of receiving the Dementor’s Kiss. Albus had not been especially worried, even then, because he knew that the prophecy meant that only Harry could kill Tom, and only Tom could kill Harry. So Albus had expected Harry to be rescued by Amelia or Augusta, not for Harry’s three magical bindings to break and for Harry to rescue himself.