Path of the Rage Dragon

For some barbarians, rage is a means to an end. For you, rage is an instinctive response. As you fight, you look more and more like a dragon. Scales erupt from your skin, your nails elongate into claws, even your face accomodates for your newfound fiery organs. The strongest barbarians of this path have been known to be able to go toe-to-toe with nearly anything.

Escalation

At 3rd level, your ferocity increases in proportion with enemies' force. Your Escalation Bonus starts at 0. For every second round you spend raging, your Escalation Bonus increases by 1. You add your Escalation Bonus to the attack and damage rolls for all Strength-based attack and damage rolls, as well as all the attacks you get from the Path of the Rage Dragon. Your size category increases by 1 for every 5 points in your Escalation Bonus. After ending your rage, your Escalation Bonus drops by 1 point each round.

Reactionary Rage

At 3rd level, when you take damage you can use your reaction to immediately enter a rage. The damage resistance from raging doesn't reduce the initial damage, but that round counts towards your Escalation Bonus counter.

Regeneration

At 6th level, you regenerate a number of HP equal to your Escalation Bonus every turn, your wounds knitting themselves back together as you grow.

Dragonfire

At 10th level, you can replace one or more of your attacks each round with throwing a ball of fire. You use your Dexterity for the attack roll. At base, this attack deals 2d6 fire damage and has a range of 120 feet. For each point in your Escalation Bonus, the damage increases by 2d6 and the range increases by 30 feet.

Held aloft by rage alone

At 14th level, draconian wings sprout from your back. You have a flying speed of 20 feet. This speed increases by 10 feet for each point in your Escalation bonus.