Thousands of years ago, the Realm Emperor was still just a youth,
he was fascinated by the power of space since childhood, often studying and simulating.
If one could control time and space, then creating a space with ease would be possible.
He referred to this as a realm.
Initially, the Realm Emperor's idea was to create a world, but sadly, the difficulty of creating a world far exceeded his expectations.
Thus, he conceived of creating a realm that belonged solely to him.
This realm could be used to block attacks from others or trap them within.
If the realm was powerful enough, it could even imprison a person for life until death.
Embracing this notion, the Realm Emperor devoted his entire life to the study of realms.
It is said that at the peak of his power, the Realm Emperor could effortlessly bring forth millions of realms, unmatched by anyone.
Among his peers, breaking through his realm domains was extremely difficult.