Scythe of Innomable Rites
Dragons are, academically, divided between the 'lesser drakes' (wyverns, drakes, linnorms, and so on) and the 'true drakes'. While lesser drakes can be found in all parts of the world (if you search for them), the true drakes are the stuff of legends, leading many to question whether they really exist or not.
In fact, the best source of information on true drakes comes from the orcs, who claimed they used to live in the Sunblight Wasteland. According to the more civilized orcs, the wilder tribes deeper into the desert keep dragon bones as symbols of their status, with the strongest tribe owning the largest skull.