From Pathfinder Lost Omens The Grand Bazaar, which isn't enabled.

Dread (Moderate)

ITEM 12

Price 1800 gp

Usage etched onto armor

Bulk —

Eerie symbols cover your armor, inspiring terror in your foes. Frightened enemies within 30 feet that can see you must attempt a DC 29 Will save at the end of their turn; on a failure, the value of their Frightened condition doesn't decrease below 2 that turn.

Pathfinder Lost Omens The Grand BazaarOGL