Baron Karl Amedeus Mordo is a character from Marvel Comics and the deuteragonist, later antagonist in the film Doctor Strange.
Baron Mordo was created by Stan Lee and Steve Ditko.
Marvel Cinematic Universe
Karl Mordo was a student fof the Ancient One who overheard Stephen Strange asking people for directions to the Kamar-Taj. Strange was attacked by three muggers, but Mordo saved his life.