I don't know if you've already asked something similar, but most Exe's (not sure if curse is still one but...) tend to kill Shadow easily (or not have him included), I'm not very aware if he also dies due to some specific cause in Curse of X , so the fact that he is THE ultimate life form (a character who is difficult to kill and who does not die from aging and survived a fall from space to earth) will have some influence? Sorry for the long ask