iron defender

*insert cool backstory of how class was formed and examples of there ability here*

shield bash

when you take an attack you can do a shield bash as a bonus action. this ability does 1d4 bludgeoning damage at level 3 and increases to 2d4 at level 9 and can be done at the same time as the shield master feats action to shove a creature.

iron guard

you are always protecting your allies gaining the following ability, when an ally within 20 feet of you is attacked you can block it, taking the amount of damage it would do, if it would miss you because your armor class than you take no damage, otherwise you take all the normal effects of that attack. at level 13 you also have resistance to the type of damage the attack is

impenetrable

you gain resistance to nonmagical piercing, slashing, and bludgeoning damage. at level 16 resistance becomes for magical piercing, slashing too, and at level 20 you have resistance to all nonmagical damage except physic.

iron titan

all constitution and death saving throws are done with advantage

paragon defender

all enemy's with half your level or less have disadvantage when attacking you and if they would have advantage they instead have neither