Melee Shield Fighter

Your shield serves as more than defense, but now also a weapon.  You gain the following abilities:

• You may don or doff a shield as a free action.
• While you have a shield equipped, you may use it as a martial melee weapon.  A shield deals 1d8 bludgeoning damage on a hit, and has the thrown property with a range of 20/30.  After you make a ranged attack with a shield, it returns to your arm if the shield is bonded to you.  If the shield is not bonded to you, the shield will land on the ground within 5 feet of the last target.  You choose this location.  If the shield benefits from a bonus to its armor modifier, you add the same bonus to attack and damage rolls made with the shield.
• As an action, you may throw your shield and make an attack against a number of creatures within 20 feet of you equal to or less than your proficiency bonus.  You determine the order of the creatures the shield hits.  You may use this ability as many times as your proficiency bonus.  After which, you cab replenish your uses after either a short or long rest.