"The Deathly Hallows. I saw Luna’s dad wearing this symbol over summer, on a necklace and asked him about it. He said each part represents something from the Three Brothers story." His finger traced the lines as he spoke. "The resurrection stone - the most familiar to us being soulbonds. The elder wand, and the invisibility cl-" Theo tapered off. "Harry, where did you get your invisibility cloak?" 