Disruptive Stance
The slightest distraction can provoke your wrath, and you're prepared to foil enemies' actions. As long as you are in this stance, you can use Reactive Strike when a creature within your reach uses a concentrate action, in addition to manipulate and move actions. Furthermore, you disrupt a triggering concentrate or manipulate action if your Strike hits (not only if it's a critical hit).
Traits
This indicates abilities from the fighter class.
A stance is a general combat strategy that you enter by using an action with the stance trait, and that you remain in for some time. A stance lasts until you get knocked out, until its requirements (if any) are violated, until the encounter ends, or until you enter a new stance, whichever comes first. After you use an action with the stance trait, you can't use another one for 1 round. You can enter or be in a stance only in encounter mode.