The grey rolling mist of the early morning had deepened to a turbulent overcast, clouding the brilliant golden sun. Somewhere in the distance, thunder rolled gently, and the wind was developing a razor bite. Outside, there was a smattering of students clustered near the main entrance, gawping at the little figures standing out on the lake. The rest of the student body was suspiciously absent—Severus could only hope the other staff were herding them back to their dormitories. 