Uncanny X-Force Vol. 3: The Dark Angel Saga, Book 1
It's the Age of Archangel! X-Force has returned from the twisted Age of Apocalypse with the Celestial Life Seed, their only hope to prevent their friend Angel from transforming into the monstrous Archangel. But X-Force is too late: Archangel has become the heir to Apocalypse and stands poised to succeed where his dead master failed. All life on Earth is forfeit unless X-Force can stop Archangel - by destroying him. But can a team of hardened killers assassinate one of their own? Can Psylocke kill the man she loves? And even if X-Force is willing to cross that line, has Archangel become too powerful to stop? Collecting UNCANNY X-FORCE #8-13.