pf2e.fyi
From Pathfinder Adventure Path: Hellbreakers, which isn't enabled.

Hellbreaker's Resolve

FEAT 4
ARCHETYPE
Activity 1 action
Archetype Hellbreaker
Prerequisites Hellbreaker Dedication
Frequency once per hour

You gird yourself in both mind and body for danger, steeling your resolve. You gain a number of temporary Hit Points equal to your level that last for 1 minute. While you have those temporary Hit Points, you gain a +1 status bonus to Will saves.

Effect: Hellbreaker's Resolve

Pathfinder Adventure Path: HellbreakersORC