Boon of The Fire Soul (TTR)

You have immunity to fire damage. And if you would be dealt fire damage, you instead convert the energy into your own power; the next time you would deal fire damage, it does 20 more (cannot stack). You can also cast 9th level burning hands and 9th level fire shield (save DC 20, or yours, whichever is higher) at will, without using a spell slot or any components. If you can upcast the spell, you can do so for this casting of it. This spell cannot be countered, and works in antimagic areas. You are unaffected by extreme heat conditions.