Guardians of the Galaxy & X-Men: The Black Vortex Alpha

Marvel's 2015 event "The Black Vortex" kicks off here, as the Guardians of the Galaxy and the X-Men clash over a cosmic artifact that grants godlike power. Sam Humphries scripts this oversized one-shot, with Ed McGuinness and Kris Anka on art, setting the stage for a space-spanning saga that tests the loyalties of both teams. It's the linchpin of a crossover that redefined the stakes for Marvel's cosmic and mutant heroes.