Guardians of the Galaxy & X-Men The Black Vortex Alpha #1 (2015)

The Black Vortex, an ancient artifact imbued with immeasurable power, is now in the hands of Mr. Knife!
With billions of lives potentially at stake, Peter Quill, the Legendary Star-Lord, is going to have to dust off his thieving gloves.
But with Knife's Slaughter Squad protecting him, Peter's probably going to need some help...