When your opponent's adversaries keep popping up like weeds, here's an event to help you thin the herd. It's most effective when your opponent has already assigned an adversary to a mission, and you spring this unpleasant surprise on him to make it a one-way trip. But in the right situations, you can also use it as an effective deterrent.

Say your opponent has two possible adversaries he could assign to your current mission. A preemptive Roundup on the one with the higher difficulty might coerce your opponent into assigning the weaker one instead, leaving you more of a chance to play an unexpected support character to complete the mission successfully. Or maybe you're many turns into a long game, and your opponent is starting to run out of cards in his deck. It might be worth the 1 power to Roundup an adversary with a lower revive cost, just to entice him to assign a different adversary with a higher revive cost. Speeding your opponent along to emptying his deck will ultimately pay off -- an empty deck is like playing Roundup on all his adversaries.