Elite Duelist

You excel at controlling the ebbs and flows of battle.

You have mastered additional ways to inflict opportunity attacks on your foes. When you hit a creature with a melee attack that creature will provoke an opportunity attack from you if they attack another adjacent target.

As a bonus action, you can enter a defensive stance that lasts until the start of your next turn. While in your defensive stance, you can make opportunity attacks without using your reaction, and you can use your reaction to make a melee attack against a creature that moves more than 5 feet while within your reach.

 while in this this defense stance you lose any abilities or bonuses granted to you by a fighting style.