So, I'm in the process of writing a fantasy novel, and I want dragons and demons to play a big role in this one. One issue I have, however, is that I don't want them to be TOO overpowered, but at the same time, I want to introduce catastrophic events that devastates the both of them. So what I have in mind for the plot is this: Something happens that plunges dragons and humans into a war, dragons effortlessly crush them, humans use a couple of trump cards that delivers a huge gut punch to the dragons, although the dragons still ultimately win with their own trump card, and at the request of a certain human, the dragons grant the humans a chance to make up for their transgressions in exchange for the humans worshiping them. This war between them predates the time I'm setting my novel in, and in my novel, the demons are causing a conflict because of an artifact that is a negative influence on their king, and humans have made this artifact. I want my readers to believe that the dragons and demons, compared to humans, are like comparing a puddle with a lake, but if humans can cause big problems for both of them then I worry my readers would see the dragons and demons as mere fantasy fodder, a cliche, so to speak. I have a certain idea in mind for this, but it may be too far past the line between sci fi and fantasy.