I loved how it wasn't just Arthur and Merlin when Merlin must reveal his magic, but Leon, too. And of course, you couldn't have picked a better knight! I thought all the descriptions at the beginning were very evocative and really built the tension, with Merlin waking up and the others being taken one by one. And I really liked the idea of the corrupted magic--I could totally see that happening, what with magic users being forced to practice covertly.