Dragonthrall( Red Hand of Doom, p. 126)
You have pledged your life to the service of evil dragonkind.
Speak Language (Draconic) 1 ranks,
You gain a +4 bonus on any Bluff check made against a dragon, and a +2 bonus on Ride checks made when you are mounted on a dragon.
You gain a +4 bonus on saves against the frightful presence of evil dragons.
You take a —2 penalty on save against enchantment spells and effects cast by dragons.