Balcifer's agent on Earth is King Zad, who is first King of the Terrons, a savage tribe that enslaves and pillages at will. Later, when the tribe is destroyed by King Voden leading a group of Viking-like northerners, Zad re-emerges as the King of Xincha, the city at the center of the world (and Tao's former home).
Balcifer's earthly emissary is King Zad, who initially holds court as the leader of the Terrons, a marauding tribe that subjects its victims to enslavement and pillage. Subsequently, after the tribe is eradicated by King Voden, who leads a band of Viking-like warriors, Zad reasserts his authority as the ruler of Xincha, the world's central metropolis (and Tao's former domain).