I have come far for you Erik Magnus Lehnsherr! In my tomorrow, you will become the greatest villain the world has ever known! And for that, you must die -- today! 
Solicit Synopsis
Legion, the supremely powerful son of Charles Xavier, wants to change the world - and he's traveled back in time to kill Magneto to do it! Can the X-Men stop him, or will the world as we know it cease to exist? Featuring the last day of Cable's life; Gambit vs. Sabretooth; the beginning of Archangel and Psylocke's relationship; and Mystique, bent on revenge! Witness the final moments in the lives of the X-Men before their world changes forever!
This issue collects following issues:
X-Men (Vol. 2) #38
"Smoke and Mirrors"
"Smoke and Mirrors"
X-Factor #108
"Promised Vengeance"
"Promised Vengeance"
Uncanny X-Men #319
"Untapped Potential"
"Untapped Potential"
X-Men (Vol. 2) #39
"Birds of a Feather"
"Birds of a Feather"
X-Factor #109
"The Waking"
"The Waking"
Uncanny X-Men #320
"The Son Rises in the East"
"The Son Rises in the East"
X-Men (Vol. 2) #40
"The Killing Time"
"The Killing Time"
Uncanny X-Men #321
"Auld Lang Syne"
"Auld Lang Syne"
X-Men (Vol. 2) #41
"Dreams Die!"
"Dreams Die!"
Cable #20
"An Hour of Last Things"
"An Hour of Last Things"
X-Men Ashcan #1
1st story
1st story