I really like the sunset it makes the art look really aesthetic, however I am not sure if the colors on the dragon are the best you could have chosen, it makes the dragon blend in the peak and makes the dragon be not well identifiable, where the dragon ends and the peak begins.
It can work if you are going for making the dragon be an eldrich horror monster, or just the dragon being camouflaged and the peak being it's home, however I think it would be better if you focused more on the dragon.
While the lack of good view of the dragon adds to them being ominous, it also makes the sky feel like the center point of the art, it's not bad and it works well here, it's just that I would have liked to see more of the dragon.
Sorry if that was long, I really do enjoy the art and think it is great, I just think there is some parts that can be better.