"That is quite enough." Snape’s voice was cold and unyielding. "When I said you should worry about your own problems, I was referring to that." He pointed at the magic signature in the container. "I’m assuming it’s yours. Dark magic signature extraction. is dangerous. An entirely stupid idea to ask your classmates to perform an extraction. Perhaps you should stop distracting Mister Malfoy from his tasks and focus on your own."