I've read enough comics and official Marvel handbooks to be able to call myself a nerd, still I haven't figured Deadpool and his immortality out. Wiki pages state that his immortality is simply the result of him being a mutant with insane healing powers, while some other sources claim that Thanos cursed him with immortality to prevent him from being with Death, whom he loved and whose relationship with Wade Wilson he was jealous of for some reason. What's true?
Also, exactly how immortal is Deadpool? To me he's always been the guy whose like, when some powerful char goes "I can burn/smash/cut you into subatomic particles!!!" Deadpool goes "But you can't kill me ;pPPpppPpPp" regardless who he's up against, and that's what makes him appealing and unique as a character to me - no matter how powerful opponents you throw at him, cosmic, magical or inter-dimensional, the @#%!% just won't die. But is this true? Or can his immortality be revoked by beings as powerful or more powerful than Thanos such as Galactus, the Phoenix Force, Doctor Strange, etc? Or is it actually Death herself who pulls the strings about Deadpool's immortality and Thanos was just the one who convinced her to make Wilson immortal? It's interesting if the last alternative is the correct one because that would mean that not even the end of the universe or a direct attack from a cosmic elite entity or for that matter any opponent from any fictional universe would kill Wilson, and frankly, that would be awesome.