"Till one of us says uncle, or till first blood, or...?"

(Magnus should have, perhaps, asked the others this question, too. But Galahad looks to be closer in age to Magnus, and has the vibe of someone who will take the bout more seriously, rather than -- potentially -- thinking of it as a fun little round with a guy who looks, comparatively, like a kid. Plus, since Magnus is getting tired, it's a good reminder to himself that he's working to a particular end rather than going all-out.)