The entire universe can essentially be divided into three parts. Around the periphery of the universe, there are an infinite number of small worlds, one next to the other, with no way to count just how many there are. In the central region of the universe, there are all intermediate worlds, among which are mixed some particularly powerful small worlds or particularly weak high-level worlds. At the center of the universe are all high-level worlds, of course. The number of high-level worlds is very limited, but their size is quite substantial, typically hundreds of times larger than that of an intermediate world.