Dethl is an immensely powerful Nightmare-Demon, who passes from slumber to slumber to seize control of them, and serves as the main villain and final boss of the Legend of Zelda game Link's Awakening. The villain is often referred to as the Shadow Nightmares, or simply the Nightmare, in which cases Dethl is the name given to its final form. Given that the final form is considered the real one, it has little impact.