Frightful Attrition

Your diminishment of your foes' ranks damages their morale. Whenever you reduce a creature to 0 HP with a Strike or spell, all enemies within 30 feet of the downed creature who witnessed the attack must attempt a saving throw against your class DC. A creature that didn't see you directly (such as if you're or remained after the attack) takes a –2 circumstance penalty to this save. Regardless of the result, each creature is temporarily immune to your Frightful Attrition for 10 minutes.

Critical Success The creature is unaffected.

Success The creature is Frightened 1.

Failure The creature is Frightened 2.

Critical Failure The creature is Frightened 3 and for 1 round.