A massive fantasy mountain-dwelling beast known as the Thornmaw

A massive fantasy mountain-dwelling beast known as the Thornmaw, resembling a fusion of salamander and armored lizard, covered in jagged rocky plates with moss and frost patches, massive jaws capable of swallowing a horse-drawn cart whole, camouflaged against the cliff face, four clawed limbs adapted for vertical climbing, glowing amber eyes peeking from stony crevices, perched on a crag high in the mountains, wind and snow swirling around it, dark fantasy creature design, ultra-detailed textures, dramatic cinematic lighting, non-humanoid