Impenetrable

You become proficient in Heavy Armors and can wield two shields at once.

Shield Strike: You can make an attack using the edge of the shield or with the broadside of the shield as you would with a weapon. Use your Constitution modifier in calculating hits and damage. Depending on your level, roll 1d4 at 1st Level plus your CON mod for damage, 2d4 at 5th Level, 3d4 at 9th Level, 4d4 at 13th Level and 5d4 at 17th Level.

Intercept: As a reaction, if you are within 5ft of an ally when they are targeted by an attack, you can change the target of the attack to you before the attacker rolls to hit.