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There's already a badge for this kind of action (albeit not a 1:1 fit): Necromancer.
The criteria are:
Answer a question more than 60 days later with score of 5 or more. This badge can be awarded multiple times.
So what you are requesting would really be an adjustment to this badge, not the creation of an entirely new one. However, I don't think an ...
Only top voted, non community-wiki answers of a minimum length are eligible
