From Pathfinder Lost Omens Ancestry Guide, which isn't enabled.

Mask of Pain

FEAT 9

Activity reaction

Prerequisites expert in Intimidation; Orc Warmask

Trigger You succeed at a Demoralize check.

Requirements You're wearing your warmask.

Your mask has grown into a manifestation of your pain, which you can release. The creature you successfully Demoralized takes 2d6 mental damage, or 4d6 mental damage if you're legendary in Intimidation. The target is then temporarily immune to additional damage from Mask of Pain for 24 hours.

Pathfinder Lost Omens Ancestry GuideOGL