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There is a Legacy version here.

PFS StandardFurious Vengeance [reaction] Feat 16

Barbarian Rage 
Source Player Core 2 pg. 84 1.1
Prerequisites fury instinct
Trigger An enemy within your melee reach critically hits you with a melee Strike.

Your enemy's blow fuels your rage and provokes your immediate retaliation. Make a melee Strike against the triggering enemy.

Traits

Rage:

You must be raging to use abilities with the rage trait, and they end automatically when you stop raging.