A wise, bearded old man in an ancient tunic floats between cosmic ruins and a futuristic city under a starry sky, holding an hourglass.

Create a highly detailed, epic, and mystical digital artwork titled "Guardian of the Time". In the center of the image, slightly towards the bottom edge, depict a corpulent elderly man with white-gray hair and a matching beard, floating weightlessly. His face and body face directly towards the viewer. He wears a flowing white garment resembling an ancient Roman tunic, paired with traditional Roman-style sandals on his feet. His expression is wise and serene, embodying timeless guardianship. The background is a vast cosmic universe filled with twinkling stars, colorful nebulae, distant galaxies, planets with and without rings, moons, and subtle comet trails, evoking infinite space and mystery. On the right side of the image, occupying the lower two-thirds, illustrate a gigantic futuristic city in the distance, symbolizing progress and innovation: towering skyscrapers with sleek metallic surfaces, flying vehicles, holographic displays, neon lights in cyberpunk blues and purples, and advanced architecture like floating platforms and energy domes. Render it slightly transparent, as if viewed through a light ethereal fog, to give a sense of remoteness and otherworldliness. On the left side, mirroring the right in the lower two-thirds, show the ruins of a colossal ancient city, representing transience and decay: crumbling stone temples, overgrown ivy on massive columns, fallen statues of forgotten gods, remnants of aqueducts and pyramids from lost civilizations like ancient Rome, See more