Trials of the Seven Heroes
The creations of a wizard of some variety, some fifty or sixty years ago, when the Ebony Queen turned to stone. Or wood. Or some hard substance, at least. The eight were turned loose on the world shortly after their creation, and several of them did not live to adulthood. Eventually, only the Topaz King and The Master were still alive, and together, they seem to have completed some sort of test or challenge which made the Topaz King into ruler of the Eight Worlds. Exactly what happened is unclear, since the Topaz King isn’t talking much, and The Master just doesn’t talk much. One or two of the other eight might still be alive, but if so there whereabouts are unknown, and The Master seems to doubt it. From the same general concept came the Seven Heroes, only they were raised in seclusion, so as to not get as many of them killed in childhood.