After a strangely welcoming greeting from his classmates, they met an incarnation of Senior Su.
Senior Su's true body was within this plane, but they could not see him, as his true body needed to be stationed at the core of this group of planes to suppress an enemy divine system.
This group of planes, mysterious like countless piecemeal planes and small planes layered upon each other like an octopus, was not Senior Su's Divine Realm but a group of planes that Senior Su was attempting to conquer. It was occupied by a divine system formed by several native deities, and Senior Su was contending with this small divine system for control of the group of planes.
With absolute strength, Senior Su had seized the central core of the group of planes, and the indigenous deities were driven out of the main plane and fled deep into the tentacle-like group of planes.