As some of the most ancient, powerful, and capricious creatures in existence, dragons occasionally enter into trysts with unsuspecting mortals or sire offspring with exceptional individuals. Likewise, the great power wielded by these creatures has long intrigued wizards and alchemists who have sought various magical methods to infuse their bodies with draconic power. As a result, the blood of dragons runs through the veins of many races. For some, this heritage manifests as a sorcerous bloodline and a predilection for magic; for others, however, the power of their draconic ancestors becomes an obsession.
Spellcasters who embrace their draconic heritage and learn to channel their abilities can become dragon disciples, fearsome warriors who possess not only the repertoire of an accomplished sorcerer but also the ability to unleash the furious power of dragons upon their foes. As dragon disciples discover the power of their forebears, they can learn to breathe fire, take flight on leathery wings, and—at the pinnacle of their abilities—assume the form of a dragon. Although they are rare, dragon disciples can be found in any land where dragons interact with mortals.
Dragon disciple (Pathfinder) on paizo.com