Parry

Gain the Parry Reaction.

Parry: Declare a parry after an enemy declares its attack on you but before it makes the attack roll. Guess the enemy's die roll. If you guess correctly, you negate any damage done to you.

If you parry with a Martial Weapon and you are within +/- 1 of the number rolled, you take half damage. 

If you parry with a Simple Weapon, you can make an attack that is considered a critical hit if the attack strikes.

If you parry with a shield in hand, the attacker must make a DC 11 Constitution Saving Throw or be knocked 5ft backward. 

The Parry reaction can be used twice per short rest.