Holy hell that dragon must be miles wide!!!... I love the way you pulled it back in the plane and the birds and the clouds for scale as well as the dragon's inner firey glow.
I'm not sure about the metalic jewelry dangling from that one dragon, or that some of the dragons seem to have front limbs and others don't. I also think the swirls on the big dragon's wings look arcane but also kind of muddle the scale. Those things must be big enough to build houses on.