A long, dark winter descends upon the world, bringing with it all sorts of dark magic that isn't usually present.
Game of Thrones, World of Warcraft, The Day After Tomorrow is basically this, with a very thin veneer of scientific explanation.
Five hats means that five tropers think it is ready to publish.
You are saying that you think this draft is ready to be published. That means the description is not ambiguous,
it doesn't duplicate an existing trope, there are at least three examples, and the title makes sense.