Index -> Playing the Game -> Mission Phase -> Resolving the Current Mission -> Revive or Score Adversaries
Once all appropriate game text has been used, if the villain player assigned an adversary to the current mission, he must decide if he wants to revive or score that adversary.
Revive. Each adversary has a revive cost (separate from his power cost). To revive one of your adversaries, you must take a number of cards equal to that revive cost from the top of your deck, then place those cards in your discard pile. Remove the adversary from the current mission. He becomes stopped. You may revive an adversary whether the mission was a success or a failure. If you don't have enough cards remaining in your deck to pay the revive cost, you can't revive the adversary.
Score. To score one of your adversaries, remove him from the current mission and place him in your villain score pile. He is no longer in play. You may later play another copy of that same adversary (and you may score that copy as well). You can only score an adversary when the hero player failed the current mission.
If you decide to neither revive nor score an assigned adversary, destroy him.
You don't revive, score, or destroy any adversaries you didn't assign to the current mission.
Once the villain player has chosen to revive or score (or neither), he destroys all obstacles and complications at the current mission.