Will of the Pupil
Communion with your familiar has steeled your mental fortitude. Your proficiency rank for Will saves increases to master. When you roll a success on a Will save, you get a critical success instead.
Pathfinder 2e Database
Communion with your familiar has steeled your mental fortitude. Your proficiency rank for Will saves increases to master. When you roll a success on a Will save, you get a critical success instead.