“Good morning, welcome,” Selina smiled as the advanced class filed into the room. She was fairly sure that, as the term wore on, the smiles she received in return were fewer and smaller. It was only natural, she supposed, with RATS drawing near for the seventh years. Still, beyond that, there was the bonfire, which sounded like it would be enjoyable for everyone. She had themed some of her classes for the intermediates and beginners around the school event but had had a harder time thinking of ways to jazz up this lesson.
“Today, we will be beginning work on conjuring and vanishing, which are some of the most complex branches of transfiguration. We touched on the relevant theory last term and your essays all reflected a good understanding of what we had covered. If you have any queries about the theory or about your individual feedback, then please see me during my office hours. The idea that something cannot come from nothing presents a problem when you get to conjuring, which seems to be entirely that. Theorists have suggested that everything that is conjurable exists in a parallel universe. Therefore conjuring is not making something from nothing but bending the fabric of our universe to be able to pull through an object from a parallel universe. The arguments for and against this theory will be presented in your essay at the end of term. For sixth years, this should be submitted at your final class. For seventh years, you have the option of submitting two weeks before your RATS in order to receive appropriate feedback before your exams.
“I have with me today a Featherstone cabinet, a piece of equipment that appears to demonstrate this theory quite well – although it does not prove it, and thinking about why will be a useful thing to include in your assignment. The main reason I have brought it in today is because it is a useful tool for starting out on vanishing and conjuring. We are very privileged to have been able to borrow this from the university,” she informed them, not quite going so far as to state that she hoped that they would all treat it with respect. They were an advanced class and it was a little patronising to suggest that they wouldn't. The cabinet in front of her was made up of two chambers, in one of which was floating a black sphere. “The cabinet contains a ball of carbon, in a pure form. Being made of a single atom type and being in a non-complex shape, this makes it a simpler form to move by vanishing or conjuring. The two boxes of the cabinet essentially contain different but linked dimensions. That's stating it rather simply – it's more of a metaphor than what is really going on – but at your level that's an appropriate way of understanding it. Because the dimensions are linked, when you vanish it from one side, it appears in the other. Or you can use the empty side and conjure it to you.
“You will come forward and take it in turns to attempt to vanish the sphere from one side to the other, and then conjur it back in the other direction. I would advise you to take notes on your experiences of using the cabinet in order to help you recall it in other lessons, as we only have it for today. Please come up in alphabetical order, and switch with the next person when the timer on my desk rings. That way, everyone will have an equal turn. In the meantime, the rest of you will have a wooden ball on your desk, which you will try to vanish. The incantation for this is 'Evanesco' with a sweeping wand movement away from you – as though you are casting something out. To conjure the ball in the Featherweight cabinet, you will use 'Prodeo' with a beckoning wand movement, like so.
“As per usual, call on me, your classmates or your text books if you are having difficulties or which for any clarifications.”