The sound of Xu Xin's watch was played out loud, so Ma Hongwei and Zeng Tao could hear it.
Both of them were surprised and turned to look at Xu Xin's watch.
"Underground? Dig a hole underground and get in?" Zeng Tao exclaimed.
"Underground..." Ma Hongwei frowned immediately.
It's fine in the sky and on the ground, but underground...
His abilities didn't seem to be able to handle the situation.
Xu Xin thought a lot in an instant.
Coming in from underground... I should have considered this possibility earlier!
Although there is a safe zone around the tree house and the roots will protect the surrounding land from being harmed,...
That might only be useful for low-level wild mutant animals and plants!
At this time, the World Tree has not yet fully grown, and its roots are at their most vulnerable.
Could it be that... the other party wants to destroy the roots of the World Tree? !
No...probably not.
The root system of the World Tree is very wide, and its impact can even cover the entire 188th area, which they cannot destroy at all.
Therefore, they should want to destroy the body of the World Tree!
"That's right, it came in from underground!"
Qin Fu was a little out of breath, obviously running. "Just to the east of Crystal City, I found an excavated cave underground, about five meters deep. This cave has penetrated about five or six hundred meters into Crystal City!"
A cave about five meters underground and five or six hundred meters long!
Only caves?
"Are there only caves?" Xu Xin immediately asked, "Are there no wild beasts or mutant creatures?"
"When I excavated it, it was gone," Qin Fu replied. "There's only a cave left, probably...less than one meter in diameter. It's very narrow. If someone wants to get in, they'll probably have to crawl. The creature that dug the cave probably wasn't very big."
"Where is the location?" Xu Xin asked again.
"It's just a few meters outside the Crystal City, but the entrance is completely flat and filled in. There's no trace of it at all."
The entrance is just outside Crystal City...
All the trees near Crystal City have disappeared. If it weren't for this tree planting, Qin Fu might not have noticed it at all.
"From my observation, this cave was definitely recently excavated. Judging from the traces in the soil, the guy who dug the cave probably left not long ago."
"So...last night?"
"No, this morning!" Qin Fu asserted, "This cave was definitely newly dug this morning!"
"...But, I don't know who dug it out." Xu Xin thought of something and his face turned a little ugly.
"Yes." Qin Fu seemed to stop, took a breath, and sighed, "Another one."
"Another burrow?" Xu Xin's eyes narrowed. "Where are the mutants? Are there any digging mutants?"
"No, there's only one long hole. This one is even longer, with..."
Qin Fu ran again. After running for more than ten seconds, he stopped and panted slightly, saying, "About seven or eight hundred meters!"
Seven or eight hundred meters...
The radius of Crystal City is only about 2.5 kilometers, and seven or eight hundred meters is considered a relatively deep position in Crystal City!
"Looking at it this way, there's no need to worry too much." At this time, Zeng Tao said, "They only dug a few hundred meters and then left. That means they can't stand it anymore. If they can stand it, shouldn't they dig directly to the innermost part and destroy the World Tree?"
"No." Xu Xin directly denied her statement. "Seven or eight hundred meters is already very deep. If it would be affected, it should have been affected long ago."
If we can reach a position of seven or eight hundred meters, we will definitely be able to go deeper and directly enter the center of Crystal City and reach the location of the World Tree.
"Hmm? So what happened? Why did you turn back halfway through digging?" Zeng Tao asked doubtfully, "Give up halfway?"
"We've found another one." Qin Fu's voice came from his watch again. "This should be the last one. This one is about five or six hundred meters long. They're all around this length."
"See?" Zeng Tao suddenly felt a little proud. "They all stopped at this distance. Doesn't that mean they can't get in here? That's definitely the case."
Xu Xin glanced out the window.
What Zeng Tao said was not without reason, but...
At this time, Ma Hongwei, who was sitting at his test bench, put down the blueprint in his hand and said, "If there are only three caves, could it be just a test?"
"Probing?" Zeng Tao turned back to look at Ma Hongwei. "What do you mean?"
"I had the same idea." Xu Xin nodded slightly. "This is obviously a test. If we want to attack the World Tree... what's the point of just a few narrow passages like this?
These passages may just be a way for the other party to test whether they can dig a hole underground to enter Crystal City and get closer to the World Tree."
"I think so too."
On the other end of the voice line, Qin Fu spoke again.
"Why do you all think so?" Zeng Tao curled her lips.
"After going several hundred meters deep, the spies confirmed that they could approach the World Tree from underground, so they left." Xu Xin explained the situation to the Explorers group.
As for why they went back after reaching a distance of seven or eight hundred meters, Xu Xin believed that the closer they were to the body of the World Tree, the more developed and dense its root system would be, and the difficulty of excavation would increase exponentially.
"We need more diggers." Xu Xin squinted his eyes and looked out the window. "So, they're going back to ask for more troops."
My dear, there is more to this chapter. Please click on the next page to continue reading. It will be even more exciting later!
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