Thanks to a convoluted system for switching memories between "cloned" bodies, immortality is within the grasp of Marvel's mutants, and one member of the X-Men is guaranteed resurrection... if she'd only die first. Endless life is on the table for the hero, but succumbing to a painful death first has soured the idea.
Storm has been afflicted with a “techno-organic virus” that is set to kill her in the next 30 days in Giant Size X-Men #1, and a cure has stumped all the big brains of mutant-kind. Emma Frost posits that resurrection is possible and Storm could just keel over and come back anew, virus free. Storm initially balks at the suggestion and runs off to break into a high-tech laboratory called “the World" to rid herself of the virus.
Storm is offered a chance at immortality but doesn’t think much of the idea. Resurrection is possible through a fusion of science and mutant abilities, available in the mutant nation of Krakoa. It's certainly possible for heroes to live an extra life, albeit experiencing the pain of death first and as long as they don't mind becoming a clone. Storm notes the possibility of everlasting life but decides she'd rather risk being virus-free and not a copy of herself. While on her mission, she ruminates on the idea of just letting the virus overtake her. The likely painful demise could be endured only for her to be revived good as new.
Storm does what superheroes do best, philosophizing about the issue mid-battle while flying eyeballs blast the heroes with beams. Storm’s powers are debilitated by the techno virus, but she is put into a contraption that decouples the virus from her body. Meanwhile, she ponders the reality of immortality. She asks “what’s one life, when you have an endless number of them?” But instead of choosing an endless existence, Storm recognizes that living life is far more meaningful with all its risks and pitfalls. She chooses to have a fragile mortality and finds beauty in the living of it.
Reflecting on the pleasures of life - especially being able to fight for what she believes in - Storm gives up immortality in favor of the "now" and not a "series of do-overs and restarts," as she puts it. Storm comes out virus-free and zaps a few floating eyeballs with lightning, ready to live her life to the fullest. Even if it is finite.