Well I have this idea of a mythological creature that hides itself as human and suddenly finds out that a long time prophecy of the world ending is actually real. Well the only one to stop it is through a child of a cursed bloodline. But since the prophecy was an eon ago people don't remember it off hand. So needless to say your hero and my heroine go looking for it . The villain, of some kind, tries to stop them. The curse gets worse and ... that's as far as I've gotten.