Lord Erebus was mentioned in the ancient human texts of 'Genesis ' and is believed to have ruled one of the many houses of the Proto Humans

From what can be discerned from Eusebian mythology Erebus sacrificed his life to The Titan to allow his people to escape the Cataclysm and make their way into the Under. At some point Erebus was transformed into a beast known as Orc but whether this was done by the Titan or some other force is unknown.