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There is a Legacy version here.

PFS StandardGuardian's Deflection (Fighter) [reaction] Feat 6

Fighter 
Source Player Core pg. 145 2.0
Trigger An ally within your melee reach is hit by an attack, you can see the attacker, and the ally gaining a +2 circumstance bonus to AC would turn the critical hit into a hit or the hit into a miss
Requirements You are wielding a single one-handed melee weapon and hold nothing else in your hands.

You use your weapon to deflect the attack against your ally, granting a +2 circumstance bonus to their Armor Class against the triggering attack. This turns the triggering critical hit into a hit, or the triggering hit into a miss.