Werewolves! of course! it all made sense to have these classes as a joint one now. First of the werewolf is a dark creature so thats the defence against the dark arts bit, next was the moon that changes the human in to a werewolf and its related to astronomy and last the wolfsbane potion. BRILLIANT!

He grabbed the Styrofoam ball after it was levitated towards his desk by Professor Flamsteed , who looked the same as in his office, gloomy, and used the stick to press and hold it. He then got up from his seat after a quick look around to see what the others were doing. He held the styrofoam ball or the moon to his face and faced the bluebell flame. Almost immediately some students began to answer the question and Yoongi did not even bother answering. Not...not that he did not know the answer ..ahem... No, he was simply wondering if there was a reason to hold a werewolf class, was someone a werewolf?! THAT WAS SO COOL! WHO?

Don't mind him, just suspiciously looking around at y'all