3rd-level / Shadow Hand
With a subtle gesture, you carve a slice of shadow from the air around you and cast it toward your foe. It wraps around the creature’s neck and squeezes the life from it. When you initiate this maneuver, you create a strand of shadow that you hurl at a creature. Make an unarmed attack against a target within 60 feet of you. This attack deals 3d8 necrotic damage instead of its normal damage. In addition, the target must succeed on a Constitution saving throw or be unable to speak and cast spells with a somatic component. This maneuver is a magical ability.