Elementomancy

Heart of Element

^{(cold, fire, stone, water...)} At 1st level, whenever you start casting a spell of 1st level or higher that deals elemental damage of your choosing, fiery magic erupts from you. This eruption causes creatures of your choice that you can see within 10 feet of you to take elelemntal damage equal to half your sorcerer level (minimum of 1).  

Element in the Veins

At 6th level, you gain resistance to elemental damage of your type. In addition, spells you cast ignore resistance to this elemental damage.  

Elementomancer's Fury

Starting at 14th level, when you are hit by a melee attack, you can use your reaction to deal elemental damage to the attacker. The damage equals your sorcerer level, and ignores resistance to elemental damage.  

Fiery Soul

At 18th level, you gain immunity to elemental damage. In addition, any spell or effect you create ignores resistance to elemental damage and treats immunity to elemental damage as resistance.       INFO:Your innate magic manifests in element. You are your element, and your element is you.