Gu Xijiu already possessed a high spiritual power. After she utilized the Eyes of Yin Yang technique, she could see a lot of spirits. There were animals and human souls. These grievances floated on a path full of bones and mourned. However, they could not leave. They were stuck here. 

Earthbound spirits! These were the earthbound spirits!

After killing these people or animals with a cruel method, their souls were not destroyed but could only float around their bones. Thus, this underground was full of grievances.

Gu Xijiu frowned. She was completely certain that this was the main nest of Mo Zhao!

The layout of this place was the same as the underground palace below the volcano, but the style was completely different. It should take a long time to build such a place.

Gu Xijiu also glanced at the color of the bones along the way. They were some that were more than ten years old, and there were others that were much newer that were only two years' old. There were even bones that just existed in recent days.

Di Fuyi's glanced around the place and frowned. The layout of this place was like a vast array but he could not identify it. He did not even know which direction he should go.

On the other hand, Gu Xijiu seemed to recognize the entire road. Despite being a little worried when she first came in, she was now like a frequent visitor here and continued striding forward.

"Have you seen this layout before?" He could not help but ask her.

Gu Xijiu did not look at him but explained, "This should be built by Long Fan. It is one of the nests he made with Mo Zhao."

Di Fuyi had seen the two other nests made by Long Fan, but the layout here was entirely different from the other two that he had seen before.

He said, "Of course I know that this is their main nest, but I am seeing this layout for the first time. How do you know where the core array is in this array?"

It was rare that he had something he did not know. If it happened in the past, Gu Xijiu would undoubtedly be proud to share this knowledge and tease him while doing so. But now, she was not in the mood.

Her voice was indifferent. "The layout here is referencing the blood flow of a python. The man behind the scenes wants to collect the blood of Little Fox, so they must be in the crucial area in the core array."

Di Fuyi remained silent. If it was a human blood flow map, he could recognize it at a glance. However, he could not say the same about a python.

"When did you study the blood flow map of a python?"

Gu Xijiu did not answer. If it was not necessary to let him know and she was too lazy to explain it now.

When she was studying medicine in the modern day, she often dissected some animals which including pythons.

Long Fan was undoubtedly a metamorphosis genius. He could build one of his nest just like an anatomical python.

If a person was not familiar with the structure of a python, regardless of how skilled he or she was, they would be trapped!

If Di Fuyi did not come with Gu Xijiu, he could have taken a day and still not find the right core array.

The two of them had walked for a long way but did not see many people. Although there were only a few people here, all of them were masters. Gu Xijiu had observed in the dark. The lowest level among these people hat at least level eight of spiritual power and most of them were at level nine.

From their conversation, Gu Xijiu got to know that these people were formerly the people under the fake Celestial Master Zuo. After the fake Celestial Master Zuo was defeated, they were brought in by the master of this secret base.