Flameborn Sorcerer

The inherited power of the spirit of a volcano, an extraplanar flaming force trying to break into this plane, the spirits of an entire town that was burned to the ground. Something in the Flameborn Sorcerer's path has imbued this sorcerer with so much raw flaming magic he is bursting at the seams. A Flameborn Sorcerer has physical wear on his body from the fire being inside, usually, the hands are cracked and blackened as that is where the most magic travels through. As a Flameborn sorcerer, you have the ability to harness extra heat and power, but as you do it slowly eats away at your mortal form.

Spark Tongue

The arcane magic you command is infused with elemental air. You can speak, read, and write Primordial. Knowing this language allows you to understand and be understood by those who speak its dialects: Aquan, Auran, Ignan, and Terran.

Flame Siphon

Starting at 6th level, anytime you deal fire damage you can heal an amount equal to your Constitution bonus.

Inherent Incineration

Starting at 6th level, you gain resistance to fire and cold damage. In addition, whenever you deal damage with a spell that does fire damage you can apply as many stacks of burn as you desire. Burn allows you to add fire damage equal to your proficiency bonus for each stack, but you will take as much irreducible damage as you deal with this feature.(You do not heal with flame siphon from the damage dealt to you)

Overheat

The Heat of your fire magic exceeds that of most defenses that usually stand up to fire. You can take the Elemental Adept feat for Fire.

 

Raging Inferno

Starting at 16th level, when you are hit by a melee attack, you can use your reaction to deal 3d6 + spell-casting modifier fire damage to the attacker. In addition, the attacker has to make a Con saving throw against your Sorcerer spell save DC. On a failed save they drop the weapon they are holding (if they have one). If they don't you deal an extra 1d6+ spell-casting modifier fire damage.

Infinite firestorm

Starting at 18th level, you gain immunity to fire and cold damage. You also gain the ability to deal fire damage over time. If you deal fire damage the affected creature will take 3d6 + your spellcasting modifier fire damage at the end of its next turn. You can also apply your Flame Siphon to any ally within 30 ft of you.