There are seven Great Dragons in the world. Presumably the eldest, and thus strongest and wisest (or at least most intelligent), of dragons.
- Azarn the Undying
- Altarikon
- Prektigon
- Aldagon
- Dhenekon
- The Ice-Drake
- The Beast of Shasla
All are capable of flight except for Azarn and the Beast of Shasla. The Great Dragons have been actively hiding for the past two hundred years; the original triumvirate of Gor, Anaran and Azrad ordered all dragons to be slain (other than a small breeding stock).
http://www.ethshar.com/serials/?p=106#comment-37240
(Details from newsgroup post <4c360737.0@news.sff.net> by Lawrence Watt-Evans on 08/07/2010 at 18:14 GMT)