A majestic fantasy dragon perched on a rocky mountain peak with massive leathery wings spread wide, scales shimmering in iridescent blues and purples, breathing a stream of blue-white flame, set against a dramatic stormy sky with lightning bolts illuminating dark purple clouds, snow-capped mountain range in the background, rendered in a highly detailed digital painting style influenced by artists like Todd Lockwood or Ciruelo Cabral, epic cinematic composition with the dragon silhouetted against the tempestuous sky, photorealistic textures on scales and wings.