"You'll remain here until the lesson ends, Flamsteed."

Lucien patted his pocket just once to be sure all four mirrors were still there. Those four students could enjoy their new home. When he got back to his office, he would slip them into different drawers in his desk, seal them shut and forget about the thorn they had become in his side in the last few months.

"I don't suspect I need to tell the rest of you you can expect the same fate. I'm done being nice. It hasn't been working." And there were plenty more mirrors unoccupied. Less students around the school would never be a bad thing.

That said, he turned and exited the room. There were still ingredients he needed to collect and he wouldn't waste more time.