Ling Han and Shui Yanyu walked for a while, and after making sure that there was no one nearby, Ling Han waved his hand and let the Rain Emperor and others out of the Black Tower.
However, he didn't let everyone out. Can Ye, Zhu Wu Jiu, and his other followers remained in the Black Tower to cultivate. Their cultivation level was still too low, so there would be no benefits even if they came out. Thus, it was naturally better for them to place their focus on cultivation.
Only five people left the Black Tower—Feng Po Yun, the Rain Emperor, Mu Rong Qing, Helian Tianyun, and Ding Ping. The Asura Demon Emperor was in the body of a puppet wolf right now, so he couldn't be counted as a person. Anyhow, he was a being from the Netherworld to begin with, so he had never been a human anyway.