Snape’s expression turns to ice, and the cursed obedience around him trembles under the weight of your command. Blue candle flames twist wildly, then gutter as the chamber seems to recoil from the degrading order. Quirrell groans weakly from the floor, and the book on the table snaps shut with a violent slap that echoes through the room. Your scar throbs with a warning so sharp it feels almost like pain.

For a heartbeat, nothing moves except dust falling from the beams. Then the trapdoor beneath the stone gives a deep, ominous shudder, far stronger than before, and the hidden pressure below surges against the seal. Snape’s black eyes never leave yours, full of fury and something colder still. Whatever control you thought you had is slipping, and the castle is answering with a threat of its own.