Snape explained the course outline for the term in very little detail, they were to learn non-verbal spell work and practice it by means of duelling. Each class they would pair with someone different so they couldn't get used to someone's style in the duel. Theo caught Draco's eye and grinned mischievously, moving his quill over his throat in a cutting motion he mimed "your dead "  his eyebrows lifting dangerously with each syllable. 