Resistance Roll
Each attribute resists a different type of danger. If you get stabbed, for example, you resist physical harm with your Prowess rating. Resistance rolls always succeed. You diminish or deflect the bad result. However, the better your roll, the less stress it costs to reduce or avoid the danger.
When the enemy has a big advantage, you’ll need to make a resistance roll before you can take your own action. For example, when you duel the master swordfighter, she disarms you before you can strike. You need to make a resistance roll to keep hold of your blade if you want to attack her.
The GM judges the threat level of the enemies and uses these “preemptive” resistance rolls as needed to reflect the capabilities of especially dangerous foes.