Zu An rubbed his eyes in confusion, wondering if he was seeing things. However, he soon figured that there was likely to be a cave there that was just slightly out of sight, thus creating the illusion that they were disappearing into the hill.

This hill was not too big, spanning about a hundred meters in height and several hundred meters in width. However, there was something unusual about it. Naturally-formed hills tended to have ridges, making them look rugged, but the surface of this hill was smooth. The trees growing on it looked odd as well, growing in too orderly a fashion. It felt more like he was looking at a carefully managed garden instead.

Once the zombie army was gone, Zu An carefully made his way over to the foot of the hill to take a look, only to realize that he had been mistaken. It was not actually a cave, but a pair of majestic stone doors. There were quite a few bizarrely-shaped stone creatures flanking the stone doors, which he was unable to recognize due to his lack of knowledge about the world. 

It looks like I need to find Shang Liuyu to hold some night-time remedial lessons for me.

He noticed that the stone doors were closed, so he tried to push them open. However, as soon as his palm came into contact with the doors, a chill immediately shot through his arm, making him shudder.

This place is way too sinister!

He took a look around the area, and soon gained a rough understanding...