Reaction

This trick is used in response to a trigger defined in its description. When the condition for the trigger occurs, you may use this trick, even if it's not your turn. [Reaction] actions are free (0 AP).

You have a number of [Reaction] actions equal to your Agility score. When you spend a [Reaction], it is gone for the rest of the scene. All of your [Reaction] actions refresh at the start of a new scene.

When you use a trick as a [Reaction], its outcome is applied before the condition that triggered it. In some cases, this can mean that the triggering condition never actually takes place.