Prompt: A concept painting of a dragon resting within an ornate underground tunnel, digital art, fantastical atmosphere, golden light illuminating intricate details, inspired by Caspar David Friedrich, Ivan Bilibin, Anne Stokes, dragon scales gleaming like gems, stained glass reflections, Byzantine tunnel mosaics, mythical underground kingdom, red dragon amidst golden arches and ornate murals depicting adventurers, Raphael Lacoste, Greg Rutkowski, Darren Rawlings, dramatic lighting, glowing gem details, cavern treasures, lush foliage peering through cracks, 32K quality, masterpiece level of polish, Digital artstation.