In order not to disturb Sun Haiwei who was in retreat, Shang Xia summoned the Thunderbird far away from the Yuanqi Stone Mine.
However, he sent out whistles one after another, but never got a response, which made Shang Xia's uncomfortable feeling become more and more intense.
After experiencing the baptism of the thunder cloud storm, in Shang Xia's view, the Thunderbird's rank should have passed the threshold of the third level.
With the Thunderbird's speed, once it senses danger and escapes with all its strength, even the existence of the fourth heaven may not be able to threaten its safety.
"So, the Thunderbird is most likely not a threat, but accidentally discovered something and followed it quietly?"
Shang Xia's thoughts were swirling in his heart: "I just don't know when the thief bird left. I was careless. When the zombies on the third level appeared before, the thunderbird neither warned in advance nor came to help. I should have
I thought of it. Otherwise, with the help of Thunderbird, this battle would not have been so difficult, and Sun Haiwei would not have been seriously injured and forced to retreat in this wild place."
While Shang Xia was thinking about what Thunderbird might find, he became more and more careful to hide his figure and at the same time increased the scope of his patrol.
Without the thunderbirds to provide warning in the sky, Shang Xia could only confirm the safety of the surrounding areas as much as possible.
After walking around half a circle with the Vitality Stone Mine as the center, everything was normal. It seemed that after the beast tide, the entire two-world war zone became much calmer.
This made Shang Xia feel a lot more relaxed. When he looked around casually, he suddenly saw the coral forest only a few miles away from here.
Shang Xia was slightly startled. Could it be that the thunderbird flew into the coral forest?
According to Sun Haiwei, the coral forest itself is a large maze formed by natural formations.
If the thunderbird strays into it, it will naturally not be able to hear Shang Xia's call.
But the problem is, Shang Xia still doesn't know whether Thunderbird entered by mistake or for other reasons.
Also, the coral forest is said to be closed to air. Even if a master from the fourth heaven enters, he will have to drop his body and walk on foot.
But in this case, the ptarmigan should not get close to the coral forest at all.
Unless, the so-called "forbidden sky" only prohibits existences that rely on their own cultivation to fly, not birds that are born with the ability to fly.
Apart from the strangeness of Thunderbird's sudden disappearance, what made Shang Xia suspicious was how the third-level zombie appeared.
Although the coral forest is very close, how could a third-level zombie appear here by chance?
And for a long time before this, there were no signs of any living corpses in the coral forest.
This news was only heard shortly after he entered the Two Worlds War Zone, and it was probably because of this news that Liu Jitang secretly drained most of Tongyou Peak's protective power and entered the coral forest.
Shang Xia once again looked back at the coral forest several miles away. The third-level zombie was definitely a member of the Zhu family before he died, and something had definitely happened in the coral forest.
It's a pity that I can't go in to find out.
Sun Haiwei was temporarily in seclusion here to recover from her injuries, and he could only stay here temporarily, waiting for her to come out of seclusion.
Shang Xia made a long circle around the Yuanqi Ore Pit, but came back with a lot of worries.
But the moment he reached the edge of the mine, he suddenly stopped where he was and looked at the pit with a solemn gaze.
There was originally a pool below, and Shang Xia and Sun Haiwei fell into the pool one after another.
But now, the water in the pool has disappeared, revealing a pool of mud at the bottom of the mine!
Where did the pool go?
Shang Xia first looked around with a vigilant expression. After seeing that he found nothing, he quickly jumped to the grotto where Sun Haiwei was retreating, and found that the door he blocked there did not show any signs of being moved.
Shang Xia stayed quietly outside the grotto for a moment. He could vaguely feel the signs of vitality slowly flowing into the grotto, and he couldn't help but breathe a sigh of relief.
After the two of them arrived at the Yuanqi Stone Mine, they were suddenly attacked by the zombies on the third level. They didn't have time to think about many things.
Looking back now, I feel that there are doubts everywhere.
This vitality stone mine is used to mine vitality stones. How come there is water at the bottom of the mine?
Even if it is due to rain, it will not accumulate into such a big pool.
Even if the terrain changes caused the bottom of the Yuanqi Stone Mine to be connected to an underground vein, why did this pool of water disappear?
Can this water still flow back?
Shang Xia came to the bottom of the mine with doubts, and explored bit by bit regardless of the mud below.
He soon arrived at the center of the bottom of the mine, where the academy had left the coordinates.
It was because the coordinate restrictions here were damaged and failed that the academy lost the specific location of this mine after the beast wave.
I originally thought it was caused by the destruction after the beast tide passed through, but now it seems that this may not be the case.
Shang Xia brushed away the mud under his feet, revealing the cracked slate underneath. There were many forbidden patterns carved on the slate, and many of the vitality stones inlaid on it had expired.
Shang Xia followed the largest crack and uncovered the silt to investigate, and soon found a cave under a thin layer of silt that was large enough for one person to enter and exit.
The weirdness may be here!
Shang Xia secretly sighed. Although the walls around the cave were eroded by the water flow, Shang Xia could still see that the cave was not formed naturally, but had just been opened not long ago, and the developer was none other than the other end of the cave.
There is no doubt that the third-level zombies are zombies!
So, where does this cave lead to?
A trace of hesitation flashed across Shang Xia's face. He turned back and glanced at the cave where Sun Haiwei was retreating, and then jumped down from the cave.
The third-level zombies are indeed extraordinary. Not only can they open passages underground, but they can also compact and widen the soil on the surrounding walls, making the underground cave look more like a deep well.
Shang Xia followed the underground tunnel only three feet down before reaching the bottom. However, what appeared in front of him was an underground passage that was obviously dug manually!
However, this passage seems to have not been completed, and it happened to be opened here. Behind Shang Xia is a hard earth and stone wall.
Shang Xia originally thought it would be an underground river. He squatted down and touched the remaining running water on the ground. Then he looked at the walls and arched passages on both sides. He knew in his heart that the walking corpses on earth were not like this.
Waiting for craftsmanship!
This is obviously a man-made underground passage that has existed for who knows how many years.
The third-level zombie might have walked along this passage to the end. After finding that the road was blocked, he opened a hole directly above his head and exited.
Without saying a word, Shang Xia took out the Jade River Sword from his waist and walked forward along this passage.
However, Shang Xia obviously underestimated the distance of this passage. He probably walked no more than three to five miles in one breath, but he still did not reach the end.
It was difficult to tell the direction of the underground passage, and the passage was not straight. Shang Xia didn't know his current approximate location for a while, but he had an intuition in his heart that he was heading towards the coral forest.
But Shang Xia felt strange in his heart. Could it be that this coral forest could still be accessed from underground?
If it was that simple, he didn't believe that others wouldn't have thought of it.
There must be something weird!
Shang Xia murmured in his heart, but suddenly found a faint flicker of light on the wall in front of him.
Shang Xia was wary and slowly approached, only to see a colorful light curtain flashing at the end of the passage.