Atunia's Blazing Rebirth

You regain all your hit points and gain immunity to fire damage for 1 minute. Each creature within 100 feet of you must then succeed on a Dexterity saving throw or take 10d10 fire damage and 10d10 radiant damage and have the blinded condition for 10 minutes on a successful save the creature takes half damage and is blinded for 1 minute. In addition any creature you hit with an attack or fails a saving throw against one of your spells for the next minute takes an extra 4d6 fire damage.