dragon fire armor

roll a 1d20 and if its 16 or higher you dawn the dragon fire armor it gives you an additional 4 on your armor  class stat and if you are dragonborn your gain an additional 2 on your armor class instead of just 4 you gain 6. (if you are dragonborn this uses up your breath weapon and only gets recovered after a long rest, if you are a dragonborn and you use this you are immune to whatever type your breath weapon is, for example if your were silver you would be immune to cold damage, or if you were bronze you would be immune to lightning damage)