This card is fantastic as it serves multiple purposes! You can indefinitely block 3 minions from ever returning by sending them to jail. Or if you send your fourth minion to jail, you can send a random minion to another player to serve as its executioner. Very beneficial when playing as or alongside heroes like Thor, Rocket Raccoon, etc who are natural minion slayers or as heroes like Star-Lord who can take advantage of facedown encounters. I'm currently putting this into my Black Widow deck, because even if no one is running a minion slayer build, I can crush the released minion using her preparations. Also, it helps that every minion you send to jail removes a little bit of threat, assuming it has SCH.