imagine prompt: an original colossal mythic leviathan, a fusion of shanhaijing beast and ancient eastern sea deity, body like a black mountain range, shell covered in wet rock, barnacles, bronze runes, moss and ancient erosion, massive turtle-dragon-whale hybrid head, three curved antler-like horns with broken chains hanging from them, glowing algae whiskers, dark golden sea-eyes containing tidal light, four pillar-like legs stepping through a dark ocean, sea surface sinking under each step, an inverted mountain hanging above its back, submerged temple ruins and cold fires inside the mountain belly, heavy sea mist, low horizon, tiny ancient ships and distant lighthouse for scale, epic scale, solemn and oppressive atmosphere, photorealistic mythic creature, cinematic wide angle, low angle view, dramatic overcast light, muted iron-grey, deep teal and cold gold palette, hyper-detailed, 8k, masterpiece, concept art, unreal engine rendering, physically based materials, volumetric fog, no anime, no cartoon, no chibi, no manga style