From Pathfinder Lost Omens Shining Kingdoms, which isn't enabled.

Commitment to Justice

FEAT 6

Activity 1 action

Requirements You witnessed a creature kill or reduce an ally to 0 Hit Points since your last turn.

When your allies are harmed, you deliver retribution. Make a Strike against the required creature. If this Strike hits, you gain a circumstance bonus to damage equal to three times the number of weapon damage dice.

Pathfinder Lost Omens Shining KingdomsORC