If you’re not clear on which dragon types correspond to which energy types, check out the sorcerer’s draconic bloodline.
The dragon warrior’s dedication to ancient practices rooted in martial dragon cults grants him a small portion of draconic power. When a character gains a level as a dragon warrior, he must select one of the chromatic or metallic dragon types. This choice cannot be changed, and it determines the dragon warrior’s resistance and the energy damage inflicted by his dragon bite (see below).
Draconic Resistance (Ex): At 2nd level, a dragon warrior gets a +2 bonus to Reflex saves against attacks that inflict damage of the same energy type of the warrior’s chosen dragon. This bonus increases by +1 for every four levels beyond 2nd, to a maximum of +5 at 14th level. Every four levels beyond 14th, the dragon warrior gains 5 points of resistance to the appropriate energy type (maximum 10 points of resistance).
This feature replaces bravery.
Draconic Prowess (Ex): At 3rd, 7th, 11th, 15th, and 19th levels, a dragon warrior rolls 1d12 for his Hit Die instead of 1d10 to determine hit points. The dragon warrior also gains other abilities, as explained below:
At 3rd and 15th levels, the dragon warrior gains a +1 increase to natural armor bonus.
At 7th level, he gains a bonus feat from the following list: Blind-Fight, Great Fortitude, Improved Initiative, Power Attack, or Toughness.
At 11th level as a free action, a dragon warrior can gain a bite attack. This is a primary natural attack that deals 1d6 points of damage (1d4 if the dragon warrior is Small), plus 1-1/2 times the dragon warrior’s Strength modifier. He can use his dragon bite for a number of rounds per day equal to 3 + his Constitution modifier. These rounds need not be consecutive.
At 19th level, the dragon warrior’s bite attack deals an additional 1d6 points of damage of his energy type on a successful hit.
This feature replaces armor training 1-4 and armor mastery.