The Wizards' Cabal:In life, Khoronus was one of the early founders of the city of Blackmoor and a counselor to the city's first rulers. Concerned because his countrymen rarely considered the consequences of their acts, he invented a time machine to see how his descendants and their city would fare. He traveled forward in time only to witness Blackmoor's complete destruction. Realizing he would never be able to change his countryman's attitude enough to prevent the disaster, he decided to take steps that would preserve his family and culture without altering the future.
Perhaps the wisest of these mages [who traveled from Thonia shortly after the founding of the empire to assist in the colonization efforts, subjugate the native wokan, and found the port city of Blackmoor] was Kargas Dolunt, distantly related to the Thonian Imperial Family. Kargas was a peaceful man, who engaged in the war against the native sorcerers only as a means of acquiring money and land for his researches, and who preferred to fight with nonlethal spells wherever possible. He came because he was interested in the land itself. He spent all his free time between engagements in contemplation, and when other wizards were only starting their studies into the nature of the land Kargas was many months ahead of them.
The result of the revelations was a surplus of mages, who "claimed every last foot of territory" in the North, initially quarreling with one another economically as they set up protection rackets throughout the land. This ultimately led to the Mage Wars.Kargas delightedly shared his breakthrough with his colleagues of the time, other wizards who shared his fascination with the nature of the North. Alas, wise as he was, Kargas did not foresee the results of his revelations.
The Wizards' Cabal continues the story of Kargas:Finally, that retribution turned violent. Mages engaged in spell-duels, tossing globes of fire and bolts of lightning while swooping through the air over populated areas. Further, these duels were so quick and vicious, when the militia finally arrived to put an end to the carnage, they found nothing but burned-out husks of villages, with no signs of those who had destroyed them.
Okay, so what if Kargas didn't become a ghost, but instead became a time-traveler who would appear sporadically centuries in the future, trying to steer history in a more positive direction? That is, what if he became Khoronus? Dave Arneson's Blackmoor says Khoronus became a god two hundred years ago. That's pretty much exactly the start of the Mage Wars (815-900). If Kargas was around at the founding of Blackmoor (circa the year 1 in the Thonian calendar), but he's horrified at the results of his efforts (the Mage Wars, approximately 800 years later) how could he not be a time traveler, or at least suspiciously long-lived? If a mage everyone thinks is long-dead is seen turning up again throughout history centuries later, most would assume he was some kind of ghost — but that might not necessarily be the case. Kargas's motivations — to change his countryman's attitude, to prevent future disaster — seem the same as Khoronus's. Someone who left his time and place to travel to other times and worlds would be seen as mysteriously vanishing, as Kargas was.Kargas Dolunt was horrified at the results of his efforts. He was a man of learning a man of study and — when possible — a man of peace. He was shattered in body and soul when the greatest discovery of his life led to nothing but violence misery and war. Witnesses claim that in the days following Surrinya’s retaliation against Raddan Kargas simply put down his books one day walked out of his home and was never seen again. Legend says however that Kargas never found rest. Wracked by guilt over what he had caused Kargas wanders the North still as a ghost mourning for the lives lost. Supposedly he appears now and again always to aid common folk menaced by a sorcerer wizard or other spellcaster as though he still seeks to make up for the suffering of the Mage Wars.
The disaster Khoronus witnessed might have been the Great Rain of Fire, but as I've argued before the Great Rain of Fire seemed to be a freak accident with little to do with his countryman's "attitude," unless he was trying to suppress their natural curiosity. Instead, the disaster he witnessed might have been the Mage Wars, which did completely devastate many communites, perhaps including Blackmoor City. Or perhaps both.