• Whenever you hit a creature with an opportunity attack, its speed drops to 0 for the rest of the turn. This stops any movement they may have been taking.
  • Creatures within your reach provoke opportunity attacks even if they took the Disengage action.
  • When a creature within your reach makes an attack against a target other than you (and that target doesn’t have this feat), you can use your reaction to make a melee weapon attack against the attacking creature.