Magneto has the ability to generate and control magnetism. Being a Jewish Holocaust survivor, he is driven to protect the mutant race from suffering a similar fate. He is portrayed by Sir Ian McKellen (Gandalf of the Lord of the Rings) in the X-Men films. Unfortunately, the bucket for a helmet just doesn't look right for such an imposing figure and I expected a much younger man to play the role. I think he's the only character that didn't come out right in the films but he's such an important character.
Toy Biz gave him a removable helmet but it's a tad too small!!