Cobra Bloodline

"The Cobra are the masters of the Naga race's strange pearl magic. No other Bloodline possesses the ability to coax the mystical secrets from the pearls that power the Naga spells. Thus the Cobra are revered among the Naga for their unique gifts. This great power has a price, however, as the Cobra are the most mutated of the Naga Bloodlines and very few of them are completely without a severe physical mutation of some sort. These mutations make surviving the hatching process difficult for infant Cobra, and even more perish during their difficult youth. As a result, the Cobra are very rare.

"Cobra are generally a secretive and somewhat sinister people. They prefer to keep their own company, though many are fascinated by human magic." -(D&D: Oriental Adventures: Rokugan p28)