Tiring Critical

Combat Critical

Your critical hits cause opponents to become fatigued.

Prerequisite: Critical Focus, base attack bonus +13.

Benefit: Whenever you score a critical hit, your opponent becomes fatigued. This feat has no additional effect on a fatigued or exhausted creature.

Special: You can only apply the effects of one critical feat to a given critical hit unless you possess Critical Mastery.

Source: Pathfinder Core Rulebook