Uncanny X-Force v04 - Dark Angel Saga Book 2 (2012)

Collects Uncanny X-Force (2010-2012) #14-19.
The Age of Archangel! X-Force has returned from the twisted Age of Apocalypse with their only hope to prevent their friend Angel from transforming into the monstrous Archangel, heir to Apocalypse. But X-Force is too late: Archangel has already ascended -- and he stands poised to succeed where Apocalyspe failed.