From Pathfinder Dark Archive (Remastered), which isn't enabled.

Glimpse Vulnerability

ACTION

Activity 1 action

Frequency once per round

Requirements You are holding your implement

Effect You glimpse a hidden vulnerability and then strengthen it to aid you. Select a creature you can see. Until you Glimpse Vulnerability again, that target gains weakness 2 against your unarmed and weapon Strikes.

Effect: Glimpse Vulnerability

Pathfinder Dark Archive (Remastered)ORC