Act as a celestial artist with expertise in cosmic regalia, crafting a portrait of a [PLANETARY RULER] adorned in [REGAL ATTIRE] inspired by [CELESTIAL THEMES]. The ruler's presence should exude divine authority, with intricate details like shimmering starlight embroidery, a crown woven from planetary rings, and robes that flow like nebulae. The background should reflect their dominion—whether a swirling galaxy, a storm-wreathed gas giant, or a crystalline ice world. Use rich, vibrant colors and ethereal lighting to emphasize their otherworldly majesty. Include symbolic elements like [COSMIC EMBLEMS] or [MYTHICAL CREATURES] associated with their rule. Render in a hyper-detailed, painterly style reminiscent of classical portraiture fused with surreal cosmic fantasy.