"You have ten seconds! Ten seconds to make it down to the duelling hall, or you will face the Calypso!"

I stood up, my eyes wide. I had barely slept all night, and now that I was starting to doze off, this rather cryptic announcement started.

I could hear the sound of people running, and before I got to the door, it suddenly swung open. Knox was on the other side, breathing hard.

"We need to get down," he said, his voice breathless.

He grabbed my hand and pulled me out the door. I ...