K is for...

"Kevara Adavra!"
Seamus cried out in agony as Carrow directed another Cruciatus Curse at him. The Death Eater was attempting to teach them the Killing Curse, but of the Gryffindors so far, none had even tried properly. The Slytherins were excelling in this class beyond belief, and Crabbe and Goyle had both been promised O's in their NEWTS. As for the Gryffindors... well, they were proof of the rebellion deep inside Hogwarts. They didn't need to kill spiders to prove they were tough.