The X-Men engage in a battle so world-threatening, even Magneto switches sides! Mutantkind races to the edge of oblivion at the hands of an evil techno-bio cloning organism... the Phalanx! Be Wolverine, Cyclops, Gambit, Nightcrawler, Beast, Psylocke and for the first time ever... play as Magneto! X-Men are at their fiercest with Cyclops' optic blast, Wolverine's slashing adamantium claws and Gambit's hyper-charged cards! Use each mutant's super-powered attack to defend the world!