In theory, wayfarers can grow without limit. But there is a diminishing return after a certain point. This diminishing return makes it more effective for the population to break up and a new, younger wayfarer to be groomed and fed.
This way, a community splits up over time into several communities, all living in different wayfarers. This is how they have survived in this world and managed to build a civilization.
Their civilization is a civilization of moving cities. Wayfarers are always on the move, following the magnetic fields all year round. Rarely do they stop.
There is very little that can threaten something the size of a city with a shell that served as an all-encompassing city wall. Some of them die of old age. when they are starved or stop growing, but others keep growing until they become demigods.
He is envious of the ability of the wayfarers. Fortunately, he doesn't have to kill a wayfarer to get it. Every Kunut has the ability within them.