Path of the Dragon Heart

Restriction: Dragonborn Only

Only dragonborn how have take the barbarian class may choose the Path of The Dragon's Heart. In the world that this is built for, the methods of emulating an dragon are achievable only to those who bear a likeness to them. Also, One of the features in this subclass only affects a racial feature from the dragonborn race.

In some places, dragons are as gods to mortals, and the mighty warriors of the dragonborn people seek to emulate them. Some gain the dragon's wisdom, and with it a mind sharp enough to cut like a blade. But others gain the dragon's heart, and the strength to become a lords of the heavens and earth.

Focused Mind and Steeled Scales

When a dragon fights, he is as ferocious as a typhoon yet calm as the moon that guides the seas it churns. He fights where he is most useful, and focuses himself to that.

At 3rd level, whenever you enter a rage, you gain a +1 bonus to AC, and you may choose a creature you can see within 30 feet and target it. The first time per turn you hit this creature with a melee attack, you deal extra damage equal to your CON modifier. The targeted creature also has disadvantage on saving throws against your breath weapon. You may change your target as a bonus action, or when your original target is killed (no action required).

Potent Breath and Crushing Bite

A dragon who cannot wield his breath and his teeth is but a welp with a wooden sword. He is ripe for defeat, and his loss should only be used as an example.

At 6th level, while you are raging, your breath's range increases by 10 feet, and the damage die increases from d6 to d8.  You may now use your breath weapon a number of times equal to your CON modifier before replenishing them with a short or long rest. Additionally, you may use your bonus action to make a bite attack against a target within 5 feet of you. The attack deals 1d8 + STR modifier piercing damage.

Commanding Voice and Mighty Roar

A dragon's roar must bring fear to his enemies, and courage to his allies.

At 10th level, while raging, you may use your action to roar with enough power to deter your enemies and inspire your allies. All allies within 30 feet of you immediately gain temporary hit points equal to 2 x your barbarian level. All enemies must succeed on a Wisdom saving throw or be frightened of you until the start of your next turn. The DC for this save is equal to 8 + CHA modifier + proficiency bonus. You may use this feature twice per long rest.

Master of Skies and Self

Lastly, a dragon that cannot fly is a sad and pitiful creature. The sky is their kingdom, and to make it yours as well is to mark the end of your journey to become as they are. Also, a dragon must be prepared to do battle with other dragons, and must have measures to survive.

At 14th level, you gain a pair of wings that give you a flying speed equal to your movement speed. Also, you gain immunity to the element type associated with your dragon heritage.