The War of the Realms has come to Midgard...and the X-Men´s doorstep! The dark elf Malekith and his endless armies are invading Earth, intent on conquering the entire planet - but Earth´s heroes have something to say about that! And the reassembled X-Men are joining the fight! But who better to lead Earth´s mutants into battle alongside the heroes of Asgard, than their very own Valkyrie - Dani Moonstar! Prepare for a legendary adventure across the realms, as the X-Men go to war!