Uncanny X-Men by Kieron Gillen Vol. 4: AvX
AVX tie-in! The X-Men make their stand against the forces of Sinister in the culmination of everything the mad geneticist has planned since UNCANNY #1! Then, as the Phoenix makes its fiery return, Cyclops and Emma gain supreme power - and it threatens to tear them apart! An unmissable story for X-Men fans! Collecting UNCANNY X-MEN (2011) #15-20.