Professor McGonagall nodded, took out her wand and gestured for Draco to give her his hand. He did so, reluctance in every movement, and Professor McGonagall pressed the tip of her wand against the palm of his hand, intoned a string of words Hermione didn’t recognise, and there was a small spark of yellowish light. Draco flinched and made a small sound of pain, jerking his hand back to his side and rubbing it on his jeans.