The way how Xu Ran smiled but said nothing gave pause to Zheng Kai.

“Ah,” He spoke, “it seems I was asking for too much. Please pretend I said nothing, brother Xu.”

It was said that somehow, distinguishing landmarks could be used to point the way in Black Cloud Valley, and that the people of the Underworld School had some sort of secret that allowed them free entry to and from the valley. 

In other words, it was a secret that would never be told to an outsider.

Bai Yunfei and the others continued to walk for some time, but no one could tell what time of day it was with how the clouds were blocking the sky. He could only guess that they walked approximately a fifty kilometers which while not even a distance that’d work up a sweat, the surrounding environment was so monotonous and foreboding that it felt like they were still in the same spot.

Then when a cumulative hundred kilometers was reached, the scenery up ahead started to change.

The dark clouds above their heads were starting to grow fainter, allowing...