The night Voldemort attacked the Potter family, his Killing Curse rebounded, leaving Harry with a lightning-shaped scar. This mark was more than a wound—it was a fragment of the Dark Lord’s soul, a Horcrux unintentionally created. The event marked the first time in history that a curse of such magnitude failed, altering the course of magical history.
As Harry grew, the scar became a conduit for Voldemort’s emotions and visions, a phenomenon documented in wizarding texts as a rare side effect of failed Avada Kedavra curses. This connection forced Harry to confront the Dark Lord’s presence long before their final showdown, shaping his understanding of destiny and sacrifice.