harry potter and voldemort reconcile their differences in harry potter and the deathly hallows
harry then reveals himself and explains to voldemort that draco became the true master of the elder wand when he disarmed dumbledore harry in turn won the wands allegiance when he took dracos wand
 character development in a 1999 interview rowling said voldemort was invented as a nemesis for harry potter and she intentionally did not flesh out voldemorts backstory at first