Snape had started to train them, their Occlumency shields were strong, and would only strengthen with practice which he said they could do on their own since he wanted them to practice Legilimency. Now Snape started to work them to the bone in dueling, in dark magic and neutral magic. He found nothing more interesting than watching the two Gryffindors duel, at first they fought like any duelist, but then one day Hermione had charmed Harry’s shoes into lead, and when Severus thought that Harry would surely lose, and that Hermione was definitely the brightest witch of her age, Harry did the same to Hermione's shirt, stopping her hand movement, and causing her to fall, and the battle went on. Transfiguration, charms, anything went and Snape never seen a more breathtaking duel, never seen anyone duel like they did.