Create a Roblox-style 3D model of a final evolved spirit named "Great Earth King" (대지왕). Design a massive rock guardian with a sturdy body made of layered stone and glowing cracks. The body should feature jagged rock formations and stone armor plates. Use earth tones like dark gray, brown, and glowing amber. Add subtle floating rock particles and a powerful seismic aura effect. The model should be simple enough for Roblox, but look powerful and collectible. Avoid hyper-realism or overly detailed textures, and focus on a bold, clean silhouette.