Ghost Tap [free-action]

Requirements Your last action this round was a successful Strike against a target you were hidden from or undetected by.

You throw an object, activate a hidden flare, or take some other action while your target is still disoriented from your attack. Attempt a Deception check against the Will DC of the target of your last Strike; on a success, you're hidden from the target or undetected on a critical success.