Path of the Steelheart

Barbarians who follow the Path of the Steelheart have undergone intense metallurgical rituals that fuse metal into their bones and flesh, granting them extraordinary durability and strength. These warriors are living embodiments of Ren’s melding of flesh and machine, using their steel-infused bodies to crush their enemies and protect their allies.

Iron Will

Upon choosing this path at 3rd level, your body begins its transformation into living steel.
Metallic Resilience: While raging, you gain resistance to bludgeoning, piercing, and slashing damage from non-magical and magical weapons.
Hardened Vitality: Your hit point maximum increases by 1 per level in this class. Additionally, when you finish a short rest, you regain an additional 1d6 hit points.Upon choosing this path at 

Steel Fortitude

By 6th level, the metallurgical infusion has strengthened your body to withstand deadly blows and debilitating effects.
Unyielding Constitution: You gain advantage on Constitution saving throws.
Ironclad Survivor: When you are reduced to 0 hit points, you can drop to 1 hit point instead. You can use this ability a number of times equal to your Constitution modifier (minimum of 1) per long rest.

Forge Strikes

At 10th level, you learn to channel the latent energies of your metal-infused body into devastating attacks.
Enhanced Strikes: When raging, your melee weapon attacks deal an additional 1d6 force damage.
Unbreakable Grip: You cannot be disarmed while wielding a melee weapon, and you count as one size larger for the purposes of grappling or shoving creatures.

Living Bastion

At 14th level, your transformation is complete, and your body becomes an indomitable bastion of steel.
Unyielding Form: While raging, you are immune to being knocked prone, paralyzed, or stunned.
Elemental Tempering: You gain Immunity to bludgeoning piercing and slashing from non magical weapons, representing the tempered steel of your form.
Reactive Armor: When a creature within 5 feet of you hits you with a melee attack, you can use your reaction to deal 1d6 force damage back to them. This force damage increases to 2d6 if the attacker is using a metal weapon.