Guardians of the Galaxy & X-Men - The Black Vortex Omega #01

Black vortex ends here!

When the entire planet, and perhaps the entire galaxy caught in the crosshairs of cosmic forces authorized knife, guardians and X-Men to solve their final test.

With billions of lives at stake, our heroes are forced to make a sacrifice.

But in getting power potentially win knife, by submitting to the black whirlwind, maybe they gave their humanity forever?