You can use the power of your bloodline to surround yourself in its element.
Prerequisites
Charisma 13, Elemental Bloodline
Benefit
Once per day, you can surround yourself with the element associated with your ancestral bloodline. For a number of rounds equal to your Charisma modifier (minimum 1), you gain resistance 5 to that energy type, and all creatures that attempt a natural weapon attack or an unarmed strike against you take 2 points of damage of that same energy type. If you already have resistance to that energy type, that resistance increases by 5.
Special
You can take this feat multiple times. Each time you do, you gain an additional daily use of this feat.