One of the X-Men's - and the entire Marvel Universe's - greatest threats begins to emerge and rear its head, in this prelude to the monumental and iconic Onslaught Saga! Onslaught is coming! But first the X-Men must survive his herald: the punishing and powerful Post! Archangel and Wolverine join Doctor Strange on a quest for a mystical cure to Psylocke's grievous, Sabretooth-inflicted injuries -- but Warren too has wounds, both physical and psychological. Meanwhile, the Brood return, the Age of Apocalypse's Dark Beast targets his Marvel Universe doppelganger, Wolverine succumbs to his animal side -- literally -- and the X-Men race to save a train full of commuters from Mister Sinister's explosive experiments! Plus: Stories set in the past reveal the origins of Sinister and Apocalypse! The X-Men have reached the end of the road to Onslaught, but have all their trials been enough to prepare them for the mysterious villain's imminent assault? COLLECTING: X-Men (1991) #48-52, Uncanny X-Men (1981) #329-332, Archangel (1996) #1, X-Men/Brood (1996) #1-2, X-Men & ClanDestine (1996) #1-2, X-Men Unlimited (1993) #10, Wolverine (1988) #101, Storm (1996) #1-4, Further Adventures of Cyclops & Phoenix (1996) #1-4, Rise of Apocalypse (1996) #1-4, Black Knight: Exodus (1996) #1, Fantastic Four (1961) #19, Xavier Institute Alumni Yearbook (1996) #1 Written by Scott Lobdell, Mark Waid, Jeph Loeb, John Ostrander, Peter Milligan, Alan Davis, Larry Hama, Warren Ellis, Terry Kavanagh, James Felder, Stan Lee & More Penciled by Luke Ross, Jeff Matsuda, Andy Kubert, Pasqual Ferry, Joe Madureira, Bryan Hitch, Leonardo Manco, Alan Davis, Val Semeiks, Terry Dodson, John Paul Leon, Adam Pollina, Jack Kirby & More