The windows are flung wide open today in the Arithmancy classroom, tempting the fickle breeze into the castle with little success. The professor who opened the windows is currently putting finishing touches on things for this practical lesson. The room's desks are nowhere to be seen, but instead there are rows of pedestals. Identical black pieces of pottery that resemble urns top each column at about waist height.

Hopefully students that enter the room will be wise enough not to touch anything.