Only this could explain the origins of Infant Soul Preservation which Ye Qing had cultivated. The creator of that method, Han Xiaozi should have been a deity from the Origin World.
Given all he learned, Li Yunmu was certain that there had been some cultivators from the Origin World who had traveled to Earth.
As for why it had happened previously, but wasn't happening anymore? It was because the method for crossing the worlds should be extremely difficult. Otherwise there wouldn't be only quasi deities on Earth without any deity level powerhouses to be seen.
If a deity level powerhouse existed on Earth, he would be sitting on the clouds like a god. In front of such a person, all the quasi deities would be just pigs and dogs. What battle sage? They would be just trash.
Li Yunmu was extremely nervous in his heart. If all his deductions were correct, then what did it signify?