Aerial perspective of an intricately detailed colossal imperial fortress, set in a shadowy fantasy realm, featuring cutting-edge CGI, with a focus on depth and layered complexity. The scene is bathed in ethereal volumetric lighting, achieving a photorealistic ambiance with hyperrealistic textures and intricate maximalism. Towers and spires pierce the misty atmosphere, each stone meticulously rendered, evoking a sense of awe and grandeur. The composition, while remaining true to the dark fantasy essence, introduces mystical elements that seamlessly integrate with the overall aesthetic, inviting viewers to explore the hidden stories within its formidable walls.