Dragonvale allows "special" dragons such as epics (Sun, Rainbow) and gem (Emerald, Ruby) to participate in races. Since it has been established that certain elements are needed to have the best chances in each race, how are "special" dragons treated? Are they "non-elemental" or "all-elements" or something else?
On a somewhat related note, what causes your "opponent" dragons to be special? Sometimes I'll enter a special and get all special opponents, other times I get all "normal" dragons.