returns to Earth during the Sakhalin Island incident, returns with reality warping powers, accompanies brother Colossus to the X-Men
Uncanny X-Men (1st series) #291-293
aids X-Men against crazed Morlocks, apparently sacrifices his life to stop them
Uncanny X-Men (1st series) #325
survives along with a group of Morlocks, teleports them to a harsh dimension called the Hill where he lives for decades strengthening their descendants, sends the strongest of this "Gene Nation" back to Earth to vent their violent tendencies
Storm (1st series) #1-4
attempts to convince Storm to stay when she finds her way onto the Hill
New Mutants: Truth or Death #1-3
infected with Legacy virus, attempts to cleanse his cells by infecting the New Mutants
Uncanny X-Men (1st series) #373-374
attempts to resurrect deceased sister Illyana
Gathering of the Twelve
captured by Apocalypse for use in his apotheosis machine
X-Men: Colossus – Bloodline #1-5
learns of family connection to the famous Grigory Rasputin, vanishes into the void
X-Force (6th series) #8
shadowy figure asserting dominance over Xeno
X-Force (6th series) #11
appears and claims the Cerebro Sword
X-Force (6th series) #23
fully establishes a mutant nation within Russia
X-Force (6th series) #24
connection with Colossus and Chronicler revealed
X Lives of Wolverine #1-5
uses Cerebro Sword to send Omega Red throughout time to assassinate Xavier
X-Force (6th series) #39
Quiet Council gives Colossus (and Mikhail) access to X-Force information network
Immortal X-Men #13
directs Colossus to undermine faith in the Quiet Council
X-Force (6th series) #43
plan to overthrow Krakoa undermined when Orchis strikes first