The air of the room was dense as Harry forced his magic to heave out of him. Wandless magic hurt so much. It was sheer agony. Like pushing out acid from every pore. But Hermione needed it, so Harry ground his teeth and bore his self-harm. For what was a bit of pain for Hermione's peace of mind, for her rest? Nothing at all. Harry willed his power out of himself, commanded it to help Hermione, to recognise her as friendly and do as she needed. He didn't know it had worked till he heard her snore into his shoulder some time later.