Magneto has used this to knock people unconscious or render foes unable to move any muscle in their body, by controlling the flow of iron in their blood. This power was hinted at in X2 ...

Several months have passed since the X-Men defeated Magneto and imprisoned him in a seemingly impregnable plastic chamber. One day, a mutant by the name of Nightcrawler infiltrates the White House ...

Magneto has grown from the X-Men's first ... The Last Stand (2006), X2, X-Men (2000), The Wolverine (2013) ...