I have drawn this Dragon with big muscles, huge bat wings, and a bird-like head. There are horns on his head, and bony frill at the jaw. The coloring on this dragon will be spectacular. I know you can do an amazing job.
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You could try and make those horns look shiny. Also, you might make the wings and the bony frill the same blend of colors, and the big muscled body another shade. I am sure you will come up with some great ideas.