Merciless Ambush

You’ve waited until just the right moment to spring your ambush and bring down your quarry.

When you activate this maneuver, choose a creature you are currently hidden from and take the Attack action and make a weapon attack, as well as any additional attacks granted by Extra Attack. Any attacks you make in this way are made with advantage (instead of only the first as normal for surprised creatures) and each deals one additional weapon damage die.