Reincarnation Cycle. The cycle which kept a human continuously coming back to life in a new body was something Ning knew was a thing for a long time and had even made use of it to find Hyesi.
There were many things he didn't know about it, however, and only now was he figuring them out.
"A soul leaves the Realm of Matter, which is our universe, and goes out to the Realm of Soul," Ning repeated what the system said. "Then it comes back. I think I understand a little."
He thought about what he had heard about the reincarnation cycles throughout his life and it made sense based on what he had heard for now.
But… there were a few more questions regarding the cycle he now wanted to know about. That was without mentioning the questions that had formed that he hadn't even gone toward.