X-Force #12 (2014)

"ENDS/MEANS" Part 2 of 5! - Fantomex's compulsion to be THE BEST has put him at odds with X-Force! Turning on his former teammates, can a squad of killers hope to escape science's perfect living weapon? - Also! The true identity of the villain X-Force has been pursuing is revealed...and it's an all-too familiar face...