Uncanny X-force: The Dark Angel Saga Book 1

As the X-Men make their desperate attempt to get Hope to Utopia, the battle will cost them one of their own. This is the end of the line. The horror of what the X-Men face is fully revealed, and the reality sets in...every single mutant on the planet is going to die. They cannot hold out any longer. And X-Force goes on their final mission. COLLECTING:X-Force #26-30