<Dd> A mutant pacifist and the world's most powerful telepath . He is also a founder of Xavier's School for Gifted Youngsters, and leader of the X-Men . Singer described the younger Xavier as "a very different beast from First Class's feckless playboy . He's a wounded animal, bearded, long - haired, filled with rage at the way the world has treated him". Kinberg said the film was intended to be the story of the younger Xavier beginning to "become the Professor Xavier we know" as Wolverine mentored him . </Dd> <Ul> <Li> Michael Fassbender and Ian McKellen as Erik Lehnsherr / Magneto </Li> </Ul> <Li> Michael Fassbender and Ian McKellen as Erik Lehnsherr / Magneto </Li> <Dl> <Dd> A powerful mutant who can manipulate magnetic fields . While he dissents with Xavier due to a wish to prove mutantkind's superiority, they revert to being allies as Erik helps the X-Men battle against Sentinels in the future . </Dd> </Dl>

Who played magneto in days of future past