Curse of Objurgation

Occultist Pursuit: 3rd, 5th, 9th, 13th, and 17th level When you target a creature with your Critical Analysis, you can choose one ability. While it can see you, the target has disadvantage on ability checks made with the chosen ability. You can use this feature twice. You gain an additional use at 5th, 9th, 13th, and 17th level. You regain all expended uses when you complete a long rest.

Granted by Occultist Pursuit at 9th level.