Nyambe gave Kamunu the task of naming all the other creations and told the human being that all the animals were his siblings.
Kamunu, being the most intelligent of all Nyambe's creations, rapidly learned and copied Nyambe's various skills: the mastery over fire; the forging of metal; the art of moulding pottery; the carving of spoons, plates and canoes; the sowing of crops; and the domestication of animals.
Although Nyambe was at first impressed, he soon became tired of Kamunu's mimicry, especially when the man started killing the animals and cooking their meat for food.
Eventually Nyambe decided to cross the Zambezi River, but Kamunu carved a canoe and followed.
Finally, Nyambe decided to move away from Earth into heaven (called Litooma in Lozi mythology).
That is how Kamunu remained on Earth, condemned to live and die here after Nyambe refused to provide medicine to prevent disease and death.
Nyambe was so upset by his wife's behaviour that he called his servant, Sasisho, and announced his decision to return to heaven.
Nyambe ordered a spider to spin a web, so that he and his servant could climb to heaven leaving Nasilele on Earth.