Idea comes from TVTropes. Basically, you describe something horrible in terms that make it sound excellent, and the next poster has to guess what it really is.
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Ex.
First Poster: A charismatic leader who is often estimated by modern scholars to have been a genius. He pulled his country out of a horrible economic depression and his innovative policies toward human rights influence modern discussions about the evils of racism and anti-semitism.
Next Poster: Adolf Hitler
An end to all pain and suffering!
Next Poster: Death
...
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And so on and so-forth. I'll start.
An event in which a powerful new diplomatic tool was used to end a major war without a single shot fired.