The Middle World emptied and populated
In the epic, the Upper World gods decide the Middle World (earth) cannot remain uninhabited, so they send down Batara Guru, son of the supreme god, who must descend and marry Wé Nyiliq Timoq, who rises from the Underworld. Their union and the lineage it begins is the deliberate project by which an empty earth is stocked with ruling humans descended directly from gods.