Pyromancer

The endless flame shall consume all, as is foretold in the ancient tales! Those who would resist or use fire senselessly must be eradicated, for the sake of creating a pure flame!

Pyromancy is an... interesting study. Most, if not all, pyromancers tend to be somewhat erratic at times, especially when dealing with any form of fire. And with their unique skillset, everything is about fire!

The Burning Man

As a bonus action, you may, for one minute, invoke blazing flame armor to coat your body a number of times equal to your proficiency bonus. When you invoke this blaze, you gain temporary hit points equal to your wizard level + your proficiency bonus. You also gain the effect of the mage armor spell (no spell slot required). While you are sheathed by this arcane blaze, any creature that makes a melee attack against you receives fire damage equal to your wizard level + your proficiency bonus.

That Sparks a Light

Starting when you take this subclass at 2nd level, you can change the damage type of any spell you cast into fire damage

Will Form an Inferno

Starting at 6th level, you gain immunity to fire damage from spells you cast. This immunity is not affected by 'Til None But Ash Remains.' In addition, you gain resistance to all other forms of fire damage

Burn Bright, Oh Flame

Starting at 10th level, you can improve your damage by burning your life. Using your reaction, you can expend hit dice to take necrotic damage equal to the roll that can't be reduced in any way. You can then add twice the damage taken to one damage roll of any spell you cast that deals fire damage

Til None But Ash Remains

Upon reaching 14th level, your spells that deal fire damage grow stronger. Any fire damage you deal ignores resistance and treats immunity as resistance. Additionally, creatures are unable to heal from your spell using an ability such as Damage Absorption