The spell snaps the room into stunned silence, but the request you force through the curse is vile and wrong, and the air itself seems to recoil. Snape’s face hardens into contempt and fury, a flicker of resistance cutting through the rigid hold you have on him. The blue flames gutter violently, and even the hidden chamber feels suddenly colder than the stone beneath your feet. Whatever threat lies below, this moment has become something else entirely: a line crossed that cannot be uncrossed.

Snape’s eyes lock on yours with lethal intensity, and the curse wavers under the weight of your own hesitation and the shock in the room. The book on the table shudders open by itself, pages thrashing as if the magic below Hogwarts is feeding on the chaos above. Quirrell strains weakly against his bindings, making a broken sound of alarm, while dust streams from the beams overhead. The trapdoor gives one ominous thud from beneath the stone, as if whatever waits below has noticed the disturbance and is beginning to rise.