Most heroic ... villain?
A lot of doers of evil deeds actually have an amazing respect for human life. In fact, given true choice and power, they prove themselves willing to save and preserve it with the best of them.
What are the greatest instances of (at least temporary) face "turns", where a villain shows unexpected mercy or even outright altruism or self-sacrifice to save other people? Are these instances more common at Marvel Comics, as is commonly believed, or at the Distinguished Competition? Who are the most heroic or life-respecting/life-saving characters yet classed as villains in comicdom going by their actual history?
Back up your assertions with scans, if possible, please.
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Submission: X-Men 190.
Kiss of Life. Mystique gives Iceman CPR