The peak level masters of this world called the planet they lived in "
Planet Lie was divided into several layers, and the World of Pain happened to be the deepest and closest part to the core. Then was the Devil World, then finally the Human World on the surface.
Planet Lie where all three worlds existed was the echo system that sustained both humans and Devils.
Su Ningfei continued, and directly told Lu Sheng that Weapon Grandmasters didn't stir up much commotion because they didn't fight within the Great Yin. Instead, they flew up into the Star Space—the space above the Nine Heavens.