Shield Combatant

You use shields not just for protection but also for offense. You gain proficiency in attacking with shields if you did not have it already. You gain the following benefits while you are wielding a shield:

• If using a shield as your primary weapon, it deals bludgeoning damage equal to 1d8 + your Strength modifier on a hit. If using the shield in your off-hand, it possesses the Light property, and deals 1d4 + your Strength modifier on hit, and other Two-Weapon Fighting properties and rules apply. Additionally, when you use the attack action with your shield, you can use your bonus action to make an additional attack with your shield, using the damage from the Shield Attack Off-hand on a hit.

• When you hit with your shield, you can attempt to knock the target back or on their ass. They make a Strength Saving Throw against your Athletics Save DC (8 + Prof Mod + Strength modifier). If they fail, you can choose to move them up to 10 ft (this can be in any direction) or knock them prone. You can use this ability once per round in combat, or once a minute out of combat. 

• When you are the target of a melee attack and that attack misses, you can use your reaction to make a single shield attack out of retribution. If you hit with this attack, it deals 1d6 + your Strength modifier Bludgeoning damage. You can use this ability once per round in combat, or once a minute out of combat. 

If your shield possesses a +1 or more, those bonuses apply to attack and damage rolls as well (You'll have to update this manually in DNDBeyond).