"One-Shot" Remover
Each night you may submit a target. If that target has an X-shot ability, you remove one of their shots (so they become an X-1-shot). If they use their ability on the same night you target them, this ability resolves before they attempt their shot, so if they're a 1-shot they lose it completely. However if they're a 1+-shot then their action goes off as normal, they just have one fewer to use in the future. They will not be made aware of this loss, and you will not be made aware if your attempt was successful.