Battle focus

As a bonus action on your turn, you can enter a state of extreme focus in combat. Your attacks find their mark more often, and your opponents struggle to gain the upper hand. For 1 minute (10 rounds) your AC increases by 5, you gain advantage on all attack rolls, and all attacks made against you are made at disadvantage. 

As a bonus action you can choose to end this effect early on your turn. Once used you must finish a short rest before you can use this feat again.