Ultimate Sacrifice

Once you reach 0 hit points, you can use your last reaction to activate this spell. In your final moments, you gather all of your magical might and release it in a large explosion. Anything within 120 ft of you needs to make a Dex save or take 20d6 points of fire damage and be thrown out of the radius of the blast. They take fall damage if it is more than 10 ft. Your body is vaporized when the spell resolves and you cannot be revived unless true resurrection or a wish spell is used.