The character is revisited as part of the cross-dimensional card game X-Men: Battle of the Atom . Bio: In the Age of Apocalypse reality, Erik Lehnsherr founded the X-Men to honor his friend Charles Xavier, whose son Legion traveled back in time to assassinate Erik, but accidentally slew his father instead. The tragic mistake led to an alternate timeline in which Apocalypse rose to power, and Magneto -- now espousing Xavier's philosophy -- created the X-Men to fight back against Apocalypse's rule. Magneto is featured in the following cards: