I was just wondering how exactly X-Man is the ultimate weapon against the immortal villain, Apocalypse. I realize that X-Man's power levels are incredible and that he has a lot of raw power, but how can that overcome, for instance, Apocalypse's immortality and aren't there other characters who have sufficient power levels to defeat Apocalypse? Furthermore, Apocalypse has a plethora of other powers that can be of great use to him in a battle. I recall a fully-powered Apocalypse being more than able endure and withstand Stryfe's ferocious attacks in Messiah War.
Any thoughts? Just curious.