Path of the Titans

In the beginnings of many of the worlds of the multiverse, the primordial titans - beings of fire, water, air, and earth - roamed free across the material plane and their dominion was absolute. Barbarians that walk the Path of the Titans have a stronger connection to the Elemental Planes than other creatures, seeking to either maintain the balance between elemental forces or unleash the power of the elemental titans upon the material plane.

Many barbarian tribes commune with a single elemental plane, harnessing the powers within in the glory of battle. Others attempt to harness the powers of each Elemental Plane, using the powerful bodies of the barbarians to control the tempest within.

Invoke Elemental

Starting when you choose this path at 3rd level, you invoke the primordial powers of the elemental Titans. When you enter your rage, you choose which of the Elemental Planes to invoke - Fire, Water, Air, or Earth. During this rage, you gain resistance to the associated damage type (Fire, Cold, Lightning, or Force, respectively) and attacks you make with a melee weapon deal an additional 1d8 of the same damage type. This effect ends when your rage ends. 

The additional damage dealt increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).

Titanic Presence

If you have proficiency in Charisma (Intimidation), you gain expertise in Charisma (Intimidation).

Elemental Deflection

Beginning at 6th level, you can harness of shield of elemental force which deflects damage from one creature to yourself. If you are raging and another creature you can see within 30 feet of you takes damage, you can use your reaction to take that damage instead. The type of damage changes to your chosen element (Fire, Cold, Lightning, or Force).

 You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Empowered Elemental

A call from one of the Elemental Planes beckons you as your presence grant them additional powers. You choose your Prime Elemental plane (Fire, Water, Air, or Earth). While raging, you gain an additional resistance based on your choice (Radiant, Acid, Thunder, or Poison, respectively).

Plane of Air

While raging, you gain resistance to Thunder damage.

Plane of Earth

While raging, you gain resistance to Poison damage.

Plane of Fire

While raging, you gain resistance to Radiant damage.

Plane of Water

While raging, you gain resistance to Acid damage.

Rage of the Primordials

At 10th level, the primordial spirits inside you are unleashed. While raging, once per turn when you hit with an attack with a melee weapon, you may take damage equal to your Barbarian level. If you do, you may deal an additional 3d8 damage on the attack. The damage type is your associated rage element (Fire, Cold, Lightning, or Force).

You may use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Primordial Scion

When you are raging, any number of creatures that you choose within 30 feet of you that you can see gain the elemental resistance you gain from your Invoke Elemental feature (Fire, Cold, Lightning, or Force).