From Pathfinder Adventure Path: Hellbreakers, which isn't enabled.

Thorn of Milani (Lesser)

ITEM 3

Price 12 gp

Usage affixed to weapon

Bulk —

Activate (concentrate)

Trigger You hit a creature with the affixed weapon.

This pure white thorn glows bright with the spirit of justice. When you activate the thorn, you deal an additional 1d4 spirit damage with the holy trait. You then gain weakness 1 to unholy until the end of your next turn.

Effect: Thorn of Milani (Spirit Damage)

Effect: Thorn of Milani (Unholy Weakness)

Pathfinder Adventure Path: HellbreakersORC