Path of The Half Dragon

Inspired by Shyvana from League of Legends, this Class wants to create a barbarian that embraces the primal power of a Dragon, ultimately allowing your barbarian to transform into a dragon.
In terms of role play i believe the barbarians that train in this path try to live isolated, their rage driving them into a feral like state where they have trouble distinguishing friend from foe.

Choose your Dragon

When picking this path, chose a type of chromatic or elemental dragon that your barbarian has fought or interacted with on a deep level.

This path will lead them on a path to embody the powers of that dragon type and the damage caused by the abilities of this class will be based on the dragon you pick (E.g. Red and Gold Dragons will give you fire damage, Blue and Bronze will give you Lightning etc)

Fury of the Dragons

Starting when you choose this path at 3rd level, you gain access to the Fury points mechanic. For every Attack you successfully hit during an encounter you receive a Fury point. All fury points are reset at the beginning of an encounter. Fury points are used to activate the powers of this class.

Raging aura

Starting at level 3, when you reach 5 fury points you can use your bonus action while raging to unleash an aura of energy related to the type of dragon you chose to follow (ie. Fire,cold,thunder etc).

This aura lasts for 1 minute.
The aura is centered on you with 10ft radius
You are resistant to the damage type of your aura (E.g. Fire,cold,thunder etc)
Enemies that begin or end their turn in your aura take 2d4 of your aura's damage type.
Using this ability consumes 5 fury points.

The damage of this aura increases to 4d4 at 6th barbarian level and 6d4 at 14th barbarian level

Starting at level 10 of this class when using your aura any allies within 10ft of you will share your resistance to your aura's damage type.

Twin Strike

Beginning at 6th level, you can attack one extra time during your attack action as a free action during your rage, but doing so will reduce the damage dice of all your attacks that turn by one stage. (E.g. a d12 damage dice becomes a d10)

To use this ability you must declare that you are using Twin strike at the beginning of your turn.

Dragons Descent

Beginning at 10th level, you can use your full action on your turn to spend 10 fury tokens and activate Dragons Descent.
Your wings unfurl and you fly in a straight line up to 60 feet. Any enemies in that line must succeed a dc 16 Dex save or suffer 3d6 [aura type] damage.
Upon landing you polymorph into a Young Dragon of the type you picked for your aura. (ie. A Young Red Dragon or a Young Gold Dragon).

This transformation lasts for 4 rounds and in addition to the powers that the Young dragon has you can also activate your aura and twin strike if you pay the necessary fury points.

Using Dragons Descent in this way consumes 10 fury tokens.

Dragon Embodiment

At level 14 your body grows powerful wings and scales as the line between you and a dragon starts to blur.

The powerful dragon wings that sprout from your back grant you a flight speed equal to your walk speed + 10ft

The tough draconic scales grant you a permanent +2 to ac and permanent immunity to the damage type of your aura.