Oath of the Living Bulwark (reworked)

The Oath of the Living Bulwark is a paladin subclass that embodies the concept of an unyielding defender. Paladins who take this oath form a symbiotic relationship with their armor and shield, which become extensions of their own body and spirit

Constitution Spellcasting

At 3rd level, use your Constitution modifier for paladin spell save DCs and attack rolls

Symbiotic Armaments

at 3rd level when you choose this oath, you form a mystical bond with divine armor and a shield these pieces of armor can never be removed ever or rust because the armor is now apart of the user's body it turns your base AC to 14 + your CON modifier and a +2 bonus to  your AC in total

Enhance Armaments

if you choose this option your armor that is fused to you as you level up gets stronger giving you a 1d6 bonus die to your health Additionally, you can make a melee attack with your shield as a bonus action, dealing 1d8 + your Constitution modifier bludgeoning damage.

Symbiotic defense

At 7th level Add your Constitution modifier to your AC (minimum +0) also When hit by an attack you can use your reaction to reduce damage by 1d8 + Constitution modifier.

evolved armor

Resistance to bludgeoning, piercing, and slashing damage from nonmagical attacks. Your bonded armor's base AC increases to 16 + Constitution modifier.

Avatar of Protection

as an action you can transform your armor evolving it one final time this also includes physical changes as well. Increase size by one category. AC increases by 3. Advantage on all saving throws. Melee weapon attacks deal extra 1d8 radiant damage.