The facts are few, and the stories unlimited, but....

Noir was a very evil person (true race unknown) who ruled the kingdom of Dhaman within the Black Mountains, which circle the northern hemisphere.  Within this kingdom were millions of evil creatures that trained day and night for when Noir would make another bid for world domination.  He tried once in 9950 S.B. and failed, but he used only a tenth of his forces and devastated the greatest achievement of the goodly races, the City. He was once a powerful mortal who lived only to serve the dark powers. When he was denied advancement by his patron deity he renounced his faith and sought power elsewhere.  He met and defeated a minor deity who had once visited Kinthur.  With that divine death, Noir rose to Demi-God status and started a campaign to conquer Kinthur. Since Noir had achieved Ascension* he left behind a kingdom of foul creatures to fight over his throne.  That kingdom has splintered and its remnants march across the world.  It is not known if Noir’s fractured empire was part of a greater plan or if his rise to godhood made him careless.  In any event, the fact remains that more monsters are wandering about now than there were five thousand years ago. This new God, Noir-Morte, the Black Death might please some evil powers and displease the good ones, neither can do anything.  Many millennia ago the Gods of Kinthur had agreed to a pact to limit their involvement on Kinthur.  It is a complicated and involved contract that even the evil Gods would not attempt to break, but Noir is held to no such restrictions.  He continues to be a thorn in the side of the Gods and an ever-present danger to all good peoples of the land.  He has also become the childhood boogey-man and scapegoat of bad luck and source of bad omens for many superstitious or paranoid people (and players). 

*Ascension is the process by which a powerful mortal being slays a god on their home plane and takes their power.  Only the lowest of deities are vulnerable to this, but it is the first step to stealing the power of the gods.