pf2e.fyi
From Pathfinder Lost Omens Hellfire Dispatches, which isn't enabled.

Fear No Pain!

FEAT 6
ARCHETYPEAUDITORYFORTUNELINGUISTIC
Activity reaction
Archetype Nidalese Horselord
Prerequisites Nidalese Horselord Dedication
Frequency once per day
Trigger An ally within 30 feet fails a save against a mental effect.

You have learned to endure pain without complaint and are capable of steeling your allies with similar resolve. When you give them a shout of encouragement, the triggering ally can reroll their failed save with a +2 circumstance bonus.

Effect: Fear No Pain!

Pathfinder Lost Omens Hellfire DispatchesORC