Written by Sam Humphries. Art and Cover by Ed McGuinness. THE BLACK VORTEX ENDS HERE! When an entire planet, and potentially the entire galaxy, is caught in the crosshairs of Knife's cosmically empowered forces, the Guardians and the X-Men face their final test. With billions of lives at stake, our heroes are forced to make the ultimate sacrifice. But in gaining the power to potentially defeat Knife, by submitting to the Black Vortex, could they have given up their humanity forever?