Create a Roblox-style 3D model of a final evolved spirit named "Radiant King" (광휘왕). Design a majestic dragon spirit infused with pure golden light, featuring elegant wing-like structures made of radiant energy. The body should be sleek and slightly crystalline, with glowing patterns flowing across its scales. Use luminous gold, white, and soft rainbow tints to enhance its sacred appearance. Add a radiant halo above its head and floating sparkles around its body. The model should look clean, powerful, and optimized for Roblox, focusing on a strong and awe-inspiring silhouette without hyper-realistic textures.