Index -> Appendix -> Triggered Effects
Some cards have game text that is triggered by specific things happening in the game. The trigger is always described first, followed by an explanation of the effects that occur. Triggered effects always begin with the words "when," "each time," or "at."
Brief Candle's game text reads: "When you play this mission, stop a character." Its effect triggers once, when you play the mission.
Ishta's game text reads: "Each time Ishta earns a different glyph, you may destroy an adversary." Her effect triggers whenever she earns a glyph she does not already have.
Part of Henry Hayes' game text reads: "At the end of your power phase, gain 1 power." His effect triggers during each of your power phases.
Multiple triggered effects on different cards can sometimes be triggered by the same thing. In these cases, resolve the effects one at a time, in an order chosen by the hero player.