Secret of the Sudden Knife

From TSOY

Secret of the Sudden Knife

Your character is a master of the assassin's art. In a surprise attack, the victim automatically takes harm level 4 (bloodied) if your character successfully hits. She should make an Endure ability check resisting your roll. If she fails, she automatically takes harm level 6. This is irrespective of being in a Bringing Down the Pain situation.

Cost: 3 points from whatever pool is associated with the ability you're using, plus 1 from each of the other pools.