Versatile Weapon Mastery

You gain the following benefits:

• Any versatile weapon has the finesse property when you wield it.
• When you are wielding a weapon with the  versatile property you can use your bonus action to enter either a defensive or offensive stance, if you enter a defensive stance you add 1d4 to your AC until the start of your next turn, if you enter a offensive stance you add 1d4 extra damage to all attack until the start of your next turn.
  You can use this feature a number of times equal to your proficiency modifier, You regain any expended uses when you finish a short rest.