Versatile Weapon Master

You have mastered Versatile weapons to devastating effects and defense.  

• When you take the attack action and attack using only a weapon with the versatile property, the damage dice for the weapon increases by 1 size. 
• When you attack using only a weapon with the versatile property, you can make an attack with your back swing as a bonus action. This attack uses the same ability modifier and damage type as the primary attack. The damage die for this attack is a d4.
• When wielding a versatile weapon with 2 hands and wearing no armor, your AC increases by 1.