QUOTE : Killing Curse, lingering and unpredictable. Dumbledore and Draco raised this magic together in their face-off at the tower. Draco disarmed Dumbledore rather than attacking, and once Dumbledore was wandless, cast no further spells against him. Dumbledore neither counterattacked nor defended himself, taking that time, unbeknownst to Draco, to freeze Harry in place. Draco learned that Dumbledore thought him and his family worth protecting—worth dying for. That magic joined with Snape’s grief and healing magic after Draco’s Sectumsempra wounds to create a young Death Eater who felt too much connection to others to be a killer. Draco had overpowered the greatest wizard of the age using Expelliarmus, the defensive spell that Snape taught Draco and Harry to use against each other so they could hate without harm. The Elder Wand recognized this magic in Draco as akin to Dumbledore’s in strength and willingly changed allegiance.