Create a Roblox-style 3D model of a final evolved spirit named "Abyss King" (암흑왕). Design a powerful and menacing dragon spirit born from pure darkness. The body should be sleek and twisted, with shadowy scales that absorb light, and a faint mist constantly leaking from its form. Its wings should be torn, made of shadow and void energy, not solid matter. Add glowing dark purple or crimson veins across its body, and a black mist aura surrounding it. The eyes should emit a sinister red or deep purple glow. Focus on pure black, dark gray, and minimal deep red highlights. The model must feel terrifying, regal, and optimized for Roblox, emphasizing a dark majestic presence.