Path of Cinder

The crackling of firelight was the first sound you heard when you were born, and it has accompanied you throughout your life, having burrowed deep into your heart. There will be a time when that fire will roar and consume everything.

Burning Blade

When you reach 3rd level, you know how to kindle the fire within your heart.

When you Rage, your weapon is wreathed in flames, and you emit bright light in a 10 ft. radius, with dim light extending 10 ft. beyond that. The first successful attack you make on each of your turns deals an additional 1d8 fire damage, and each creature of your choice within 5 ft. of the target takes half as much fire damage, as plumes of flame reach outwards from the target.

When you reach 14th level, the bright and dim light's radius increases by an additional 10 ft., and the additional fire damage increases to 2d8.

Cinder Soul

At 6th level, the flames wreathe around you without so much as a spark.

You gain resistance to fire damage. Moreover, as an action, you can touch a flammable object that isn't being worn or carried, and set it on fire.

When an ally within 30 ft. of you takes fire damage, you can use your reaction to halve the damage it takes - you then gain temporary hit points equal to twice your proficiency bonus, as you draw and absorb the flames toward you.

Firesight

At 10th level, you can close your eyes in meditation and seek the flame.

You can choose to meditate and focus on flame - after 1 minute, you are able to see through any fire you have viewed or felt before if it is on the same plane of existence as you. The effect lasts as long as you concentrate (as if concentrating on a spell), and you are blind in regards to your own senses.

While the effect lasts, you can freely change the fire through which you are seeing - the fire can be any size, but for it to be considered the same fire you perceived before, it must have continued burning since you last saw or felt it.

Cinder Body

At 14th level, your enemies can barely withstand your flames.

Each creature of your choice that starts its turn within 10 ft. of you takes fire damage equal to your proficiency bonus. Each time you would be reduced to 0 hit points while Raging, you can deal the same amount of damage - you can even do so when you successfully use your Relentless Rage feature.

Finally, fire damage you deal with your attacks ignores resistance to fire damage.