Enemy
Humanoid. Cultist.
While the number of the current act is greater than the number of the current agenda, Keeper of the Oath gains hunter.
Forced - At the end of the enemy phase: Find each investigator whose location shares a Trait with Keeper of the Oath's location. Move 1 clue from each of those investigators to Keeper of the Oath.
No faqs yet for this card.
Note that the Passageway trait will trigger them too, and that they're hunting through passageways if at act 3. As such, it's recommended to have extra clues before going to the Hidden Library if you didn't get rid of them.
Finally, note they could have been much nastier though if the Halls shared a trait.