Design a dark and mysterious item icon for a 'Death Mask,' featuring an ornate, bone-white mask with hollow, haunting eye sockets. The mask is adorned with intricate carvings of skulls, dark runes, and faint cracks, giving it an ancient and foreboding appearance. A subtle aura of shadowy mist surrounds the mask, hinting at its cursed and magical nature. The overall tone is gothic and eerie, evoking dread and fascination.