Create a striking and mystical image of Ravana, the demon king from Indian mythology, formed entirely from swirling, dark smoke. His ten heads should be emerging from the smoky tendrils, each face faintly visible within the vapor. The smoke should flow and twist around the figure, giving a haunting, ethereal feel. Use shades of grey, black, and dark purple to enhance the ominous and powerful atmosphere. The overall image should feel dark, mysterious, and symbolic of Ravana's legendary status