Mastiff noir majestueux avec lanterne dans une forêt nocturne mystique

An epic, atmospheric fantasy artwork of a massive, majestic black Tibetan Mastiff dog walking through a mystical, foggy ancient forest at midnight. Hanging from its heavy leather collar is an antique brass lantern casting a dramatic, warm amber and teal light across the mossy ground and gnarled tree roots. Volumetric fog caught in the lantern's light beams, dramatic chiaroscuro contrast, mysterious and safe guardian mood, sharp focus on the dog's detailed fur, Unreal Engine 5 render.