The blow to his head was stopped by a wall of air, and Talek kept his footing, seeming to not react to having his foot stomped on. "A little bit of wisdom for you all. Just because you can't sense magic from someone, doesn't mean they have none. The first thing any of you should learn how to do here, is to hide your magical abilities from others who can sense it"
Shakuntala thought that Talek was an oppentent that was going to be hard to beat, i they ever could. Maybe that was the point. Give them someone to fight with, that would make them strive to do just that. Beat him.