Its not too 'magical' per se.
Bot has stake + receives delegation -> bot has a big vote value
You give the command in a post reply and the bot votes for the post (maybe more options for smaller/bigger vote).

Rules are not clear yet as what you would have to do to be eligible, maybe delegation would give you this power (you delegate what you can, and can use the bot with a much larger vote capacity collected from multiple users).

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