You know how to strike subtly and exploit a foe's distraction. Once per turn, you can deal an extra 3d6 damage to one creature you hit with an Attack if you have advantage on the Attack roll. The Attack must use a Finesse or a ranged weapon. You don't need advantage on the Attack roll if another enemy of the target is within 5 feet of it, that enemy isn't Incapacitated, and you don't have disadvantage on the Attack roll.