Index -> Playing the Game -> Mission Phase -> Performing Actions -> Activated Abilities
As the hero player or villain player, you may also use an activated ability on one of your cards in play when it is your turn to perform an action. An activated ability is any paragraph of game text that contains a "--" symbol.
The part before that symbol is the cost to use that activated ability. If you are unable to pay this cost, you can't use the activated ability. The cost isn't necessarily an amount of power. It may include one or more glyphs.
The part after that symbol is the effects you carry out after paying the cost.
You may use the same activated ability more than once, as separate actions, provided you can pay its cost each time.