From Pathfinder Lost Omens Highhelm, which isn't enabled.

Cracked Mountain

FEAT 12

ARCHETYPE

Activity reaction

Archetype Stalwart Defender

Prerequisites stalwart defender dedication

Frequency once per hour

Trigger You would be reduced to 0 Hit Points but not immediately killed.

Requirements You are in Tenacious Stance.

You fight on, staying on your feet and lashing out at a foe. You avoid being knocked out and remain at 1 Hit Point, and your Wounded condition increases by 1. Make a melee Strike at an enemy within reach. You immediately end your Tenacious Stance.

Pathfinder Lost Omens HighhelmOGL