Ugh! Gwen shuddered at the picture. That thing was freaky! And magic couldn't work against it? No, she'd misheard apparently. Only certain types of magic couldn't work.

The class consensus seemed to be charms, but Gwen agreed with the boy who'd talked about shield charms and things. Charms were good.

"Um, transfiguration?" she tried. One, because it was different than all of the other answers, and two because she couldn't imagine being very successful trying to transfigure a demon into something else. Especially that demon.