The sorcerer king was the king of Sideria, that tried to destroy Wandering Weevils with Demagogue Dan's Spell of the Fiery Furnace, but ended up taking out his castle and most of his kingdom along with it. Many of the druids are sorcerer-kings and weather-magicians. In fact, Druid appears to be a term equivalent to 'sorcerer king' in meaning, which may suggest that Sideria was once ruled by the Druids.