Questions tagged [mister-sinister]
Use this tag for questions explicitly about Mister Sinister, a recurring villain from Marvel's X-Men franchise. Always use in conjunction with the [marvel] and [x-men] tags.
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What does the diamond on Mister Sinister's forehead do?
As far as I remember, Mister Sinister has had a Red Diamond on his forehead, such as this image from 1989.
I can't find anything online to explain this gem. Is it just aesthetics, or does it serve a ...
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