I think there’s an instruction missing in the middle of this.

Indeed – I’ve added the missing word. I’ll just pretend I was using the phrasing used for safety-critical communication in aviation (which omits “to” and “for” from sentences whenever the meaning of the sentence can be guessed without them, lest they be mistaken for the digits “two” and “four”).

Don’t forget that “It Can’t Be That Easy” just enacted and changed the ending of the sentence you’re trying to replace. Please try to keep the intention of not selecting an EFF Word that is already in the ruleset, in case by pure unluck a Mastermind randomly selects 3 EFF Words that are all already in the ruleset.

Fixed, I think – this rerolls any words that are in the ruleset already, meaning that there are always three positive-difficulty words to choose from.

I’m not sure why the restriction to only Masterminds rolling each other’s words.

@Brendan: The point is to pick a difficult word, so you need the person rolling to have an incentive to pick a difficult word rather than an easy one. The only person with such an incentive is the other Mastermind, as they’re guaranteed to be on opposite teams – other participants could pick an easy word in the hope of ending up on the same team.