Grandmaster

You have reached the apex in the art of dueling. You gain the following benefits: 

• On your turn you may add half your proficiency bonus rounded up to your AC for 1 minute. You may use this feature once between long or short rests.
• If an attacker that you can see and is within 5 feet of you hits you with a melee attack, you can use your reaction to parry the blow by contesting the attack with an attack roll of your own. If your attack roll is equal to or higher you receive no damage. If you roll a crtical hit and your opponent did not also roll a critical hit, your opponent is disarmed of one object of your choice. 
• If you chose to fight with two weapons, your offhand attacks do not require the use of your bonus action. You are able to fight with two single handed melee weapons even if they do not have the light property. 
• On your turn as a bonus action you may impose disadvantage on one creature who you can see and is within 5 ft of you. You may use this feature a number of times equal to half your proficiency bonus rounded up. You regain all expended uses after a long rest.