Create a Roblox-style 3D model of a final evolved spirit named "Wind King Pegasus" (풍왕마). Design a majestic and powerful winged horse spirit, fully grown with large, elegant wings that radiate swirling wind energy. The body should be slender and muscular, built for speed and flight, with flowing mane and tail that move like gentle breezes. Use clean white and light sky-blue tones for the body, and semi-transparent wings filled with wind patterns or subtle cloud shapes. Add floating feather particles and a swirling air aura trailing behind it when it moves. The eyes should glow with a soft, mystical blue light. The model must appear regal, swift, and optimized for Roblox performance. Focus on a clean, bold silhouette with magical, airy effects but avoid over-detailed textures.