Lunar Exotics

This description from White Bear / Red Moon is still pretty much the case, 45 years later!

THE RED EMPEROR was one in a long line of wizard kings, responsible only to their mother, the goddess of the Red Moon. The emperors were immortal in that no natural death could claim them, though they could be slain in combat. Because the dynasty was fanatical and warlike, many Moonsons descended to rule. They appeared identical, and each maintained the policies of his predecessors, so that it seemed that one man ruled for centuries. The Red Emperor is both a Hero and a Magician. and may use those rules on pp. 17 and 19.

White Bear Red Moon, Lunar Exotics, page 24.