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

Cursed Effigy

FEAT 8
Activity 1 action
Prerequisites Exploit Vulnerability

Requirements Your last action was a successful Strike against the target of your Exploit Vulnerability, and the Strike dealt physical damage.

After your attack, you grab a bit of blood, cut hair, or other piece of the creature's body. You incorporate the material into a premade doll, paper figure, or other effigy to create a sympathetic link that makes it harder to resist your abilities. As long as you are Exploiting Vulnerability against that creature, it takes a –2 status penalty to its saving throws against thaumaturge abilities or items that use your thaumaturge class DC.

Pathfinder Dark Archive (Remastered)ORC