The transformtaions will be explained in the next section. It's tricky. I think I'm at the same time a) overanalysing it and b) using magic to explain it ... I need to work on it more. But as per traditional werewolves, they do have to change when the moon is full, as well as having control over it at other times, a bit like Disc werewolves, as opposed to Harry Potter werewolves.