Harry opened the door of the chamber and slowly stepped inside, Hermione following close behind. It was crackling with magic already. The runes on the floor flared with blues and greens and purples, while the alchemical symbols flashed silver and gold as Harry began conducting them in practiced sequence. He was standing near the plinth at the elevated centre of the room, twirling and twisting his wand as if he were writing out a language in the air. Hermione watched him a moment and gasped.