Korghos Khul is a Mighty Lord of Khorne. He was prominently featured in the Realmgate Wars as an antagonist, and hasn't really been brought up much since, apart from a Black Library novel about his origins.
He was apart of the Khul tribe in Aqshy back in the Age of Myth, and he was called Athol Khul. This tribe did its usual Conan shtick until an unfortunate chain of events happened that caused him to pledge himself to Khorne. He then formed a Warband called the Goretide, and promptly went on to skullfuck a vast amount of Aqshy. That was, until the stormies came and spoiled his fun, foiling his plans to ascend to a Daemon Prince.