Index -> Playing the Game -> Mission Phase -> Resolving the Current Mission -> Use Success and Failure Game Text
Next, players use any game text that is triggered by the resolving of a mission. Such text is labeled either with the Success or Failure keyword, and is used depending on whether the mission was a success or a failure. This game text is not optional unless specified (using the word "may"). Players use only the game text on the current mission and on the cards assigned there.
The hero player first uses any game text on his hero cards (in the order of his choice), then the villain player uses any game text on his villain cards (in the order of his choice).
The Supply Raid mission was a success, so Jason now uses its game text: "Success: Your opponent loses 2 power." Had he failed, Paul would have used the game text on Salish Spirits: "Failure: Destroy a support character." Paul would have destroyed Olaf.
Whether the mission was a success or a failure, all characters assigned there now become stopped.