The Dragonsworn

This Barbarian is either a Dragonborn or Dragon-Kin. They are deeply connected to their Draconic Heritage and as they level it manifests. Eventually they become like their ancestor a powerful dragon 

Tooth & Claw

At 3rd level, you have no need for weapons anymore. You grow claws, The claws are natural weapons, which you can use to make unarmed strikes like a monk.
At 6th level, your natural attacks count as magical weapons.
At 10th level, each of your natural attacks deals an additional d6 of damage associated with your draconic ancestry.
As a bonus action you can make a bite attack against your foe you bite deals double the damage dice of your claw attacks and gain all the same benefits that the claws do.

Resistance of the Wyrm

Upon reaching 6th level, once per rage when you fail a saving throw you can instead choose to succeed it.

Frightful Presence

Beginning at 10th level, you can use your action to frighten creatures with your presence. When you do so, creatures that you can see within 60 feet of you. If the creature can see or hear you, it must succeed on a Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Charisma modifier) or be frightened of you for one minute

A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune for 24 hours

Form of the Dragon

At 14th level, a Dragonsworn can assume the form of a dragon, type determined by your draconic ancestry .
This ability works like the true polymorph spell.
if no such creature is in the monster manual select a dragon whose CR equals the Dragonsworn level and swap out breath weapon damage.