X-Factor by Peter David Omnibus Vol. 4

As Havok and Polaris take the reins of X-Factor Investigations, the Isolationist makes his chilling return! Then, when someone or something begins eviscerating super heroes in Seattle, X-Factor is called in to investigate. A departed friend returns! Madrox looks into a suicide case that isn't what it seems! Banshee is suspected of murder! Strong Guy asks M on a date! And after discovering a long-buried secret from the past, someone will be pushed to the brink of insanity! But when hell comes to Earth, the few remaining X-Factor members make a last-ditch effort to save the world — but not all will survive the final battle! One era ends — but years later, an All-New X-Factor is formed! Led by Polaris, they use their corporate backing for the betterment of society!

COLLECTING:X-Factor (2005) 233-262, All-New X-Factor (2014) 1-20, X-Men Legends (2021) 5-6