Design a terrifying, high-detail clown mask that is wearable, fitting snugly around the face. The mask should feature exaggerated, sharp teeth extending from a slightly open mouth, with deeply sunken eyes and hollowed cheeks. The skin should have a gaunt, decaying texture, with prominent veins and cracks, giving an ancient undead appearance. The forehead features subtle, devilish horns protruding slightly from the skin.