Nightmare is a character from the Marvel Cinematic Universe. He appears in Doctor Strange 2. Nightmare is voiced by Christopher Walken.
Nightmare appears in Doctor Strange's dreams. He wants to kill him in his dreams, but he fails the whole time. Later, Baron Mordo wants to work together with him. He accepts it. While making a plan to kill Doctor Strange, they are attacked by his team. He sent all his demons to get them. He puts them in a cage. Suddenly, they are attacked by Christine Palmer and she opens the cage of Doctor Strange, Wong and Clea. Wong and Clea attack him and later Strange and Palmer too when Baron Mordo goes away in a portal to Earth. Team Strange defeat him and go away in a portal too. The Dream Dimension explodes and Nightmare dies.