Scratch:Intelligence

Willpower is the difficulty of deception, persuasion, intimidation, mind reading, mind control and other psychological attacks. A character’s willpower is 10 plus his best mental ability level. Mental abilities include command, healing, craftsmanship, navigation, driving and piloting.

Anybody using a basic delaying attack (no ability bonus, makes the target skip a turn) can choose to target willpower instead of defense. This means the delaying action involves more deception or distraction instead of grabbing or hitting.

Stalking and Command can be used to do an intimidation-attack against will power on a single target. If an intimidation-attack succeeds, the target is forced to evade on its next turn.