Avatar of Flame

As you blood boils flames erupt and coat you're body in a redish and purple flame that can't be extinguished by nonmagical means. While this spell is active creatures that attack you must make a Dex saving throw or take 5d10 fire damage on a failed save and half as much damage on a successful save however each turn this is active you will take 1d10 fire damage regardless of resistance and immunity but you gain immunity to other fire damages.