Tenger

The Tenger originated with Tengri, the god of the Eternal Blue Sky who would become the namesake of the pantheon. He predated all things in central Asia, and coupled with Gaea to create the god Erlik. Erlik, however, became prideful and arrogant, forcing Tengri to banish him to the underworld, where he became the god of death and evil. Tengri replaced Erlik as architect of the Earthly plane with Ulgen. The banished Erlik descended upon humanity with sin and disease, even finding a small group of worshipers during the Hyborian Age centuries before the other gods became popular