You learn the Challenge maneuver. If you already know this maneuver, you learn a different maneuver of your choice for which you meet the prerequisites.
When you use your Challenge maneuver, you can choose for it to last for 1 minute, instead of until the end of your next turn. When you do so, the effect ends early if you use this maneuver again, if you make an attack roll or cast a spell targeting any enemy other than the target, if an ally damages the target, or if you end your turn more than 30 feet away from the target.