Path of the Dragon

This Barbarian subclass is reserved for Dragon and Dragonborn races. 

You posses the fury and power of a mighty beast, a Dragon. 

Dragon Rage

Starting when you choose this path at 3rd level, When you enter a rage you can immediately use your breath weapon attack as a free action, this does not use one of your breath weapon uses. Once you use this feature you cannot use it again until you finish a short or long rest. Also while raging you have immunity instead of resistance to the damage type of your draconic ancestry type. 

Dragon Claws

Beginning at 6th level, your unarmed attacks deal 1d8 + Strength modifier slashing damage. At level 10 this becomes a d10 and at level 14 a d12. Also your unarmed melee attacks are considered magical for the purpose of overcoming resistances and immunities. 

Frightful Presence

Beginning at 10th level, you can use a bonus action to make each creature of your choice that is within 60 feet of you that can hear or see you make a Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Charisma modifier) or be frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a successful save. Once this effect ends on a creature that was affected by you Frightful Presence the creature is immune to your Frightful Presence for the next 24 hours. Once you use this feature you cannot do so again until you finish a short or long rest.

Dragon's Might

Starting at 14th level, while raging you double the number of die used to calculate damage from you unarmed strikes. 1d8 becomes 2d8, 1d10 becomes 2d10, 1d12 becomes 2d12. Additionally while raging you are immune to the charmed and frightened conditions.