Depict a celestial guardian standing atop a floating island in the sky, surrounded by glowing nebulae and twinkling stars. The guardian, an ethereal figure with flowing silver hair and radiant wings, holds a staff emitting a soft, magical light. Below, the island is adorned with luminescent flowers and cascading waterfalls, creating a serene, otherworldly atmosphere. Best quality, high resolution, hyper-detailed, 8k, celestial majesty.