And there is one more detail that can help (or not!). As I
posted above a while back, they got a big tooth. They dont know yet what it does, or where it is from. For all they know, it's a trinket shaped like a tooth. I will follow the suggestion and give it a kind of pro and con effect, and was thinking about using it on the final fight. For instance, if they use it, they can lift the curse of the dragon