Overlord Zeffeero was the ruler of a walled city in Outworld called Lei Chen, who refused to hand over his city to Shao Kahn. Zeffeero once served as an advisor to the Konqueror many years ago, but he grew sick and tired of the emperor and broke away from his control. He and his band of fellow Outworlders have found a new home within the Lei Chen Mountains and built a city with high walls surrounding the town named after the mountains they take refuge in, to protect it from enemies and outsiders and made himself leader and ruler of the city.