Kieron Gillen masterminds a tumultuous era for the X-Men! Beast and Abigail Brand must save the alien-monitoring S.W.O.R.D. agency when Henry Peter Gyrich stages a coup! But down on Earth, how will the X-Men explain themselves when the public learns Magneto has joined the team? Making matters worse, a Breakworld warship arrives on a vengeance-filled mission - and when Asgardian black magic empowers the Juggernaut, he becomes more unstoppable than ever! Then, after the X-Men are torn in two, Cyclops leads a new "Extinction Team" of heavy hitters - including Storm, Emma Frost, Namor, Colossus, Magik and Magneto! And not a moment too soon as world-ending threats are mounting quickly - including Mister Sinister harnessing the power of a Dreaming Celestial! When the Phoenix Force returns, the X-Men clash with the Avengers - and the consequences are cataclysmic for Cyclops! Collecting S.W.O.R.D. (2009) #1-5, UNCANNY X-MEN (1981) #534.1 and #535-544, X-MEN: REGENESIS (2011), UNCANNY X-MEN (2011) #1-20 and AVX: CONSEQUENCES (2012) #1-5.