A letter from Neville’s gran gives Harry the missing piece: wand allegiance can shift, and it is not just the Elder Wand. In the Room of Requirement, the realization hits like a Bludger, and Harry bolts to confirm his theory with old clippings from 1945 to 1946. Sneaking under the cloak through the dungeons, he hunts proof and overhears Dumbledore pressuring Slughorn, as Harry closes in on the truth of who’s been holding the most dangerous wand in the world.
