With the map, the entrance shouldn't have been hard to find, but this time when everyone knew that there was an underground space, they had more concerns about their actions, and they became more cautious and cautious.

"Look if it's the stone. Phil asked, then pointed to a prosaic raised stone halfway up the mountain in the distance.

Wei Youfang compared the situation in his mind, nodded, and then gathered everyone.

"It's supposed to be the rock, but don't get too close, and think about if there's anything you can think of that is hidden or a reminder of magic or equipment. Wei Youfang brainstormed.

"Isn't that your hidden eye?" asked Grady.

Wei Youfang shook his head, "I'm not asking everyone to find what they have to observe, I'm asking you to think about what can be covertly observed so that we can find a way to crack it, I think there must be something at the entrance that group of guys who imprisoned my friend's subordinates to observe the situation, we have to test and crack it before opening the stone." ”

Wei Youfang's map skills are indeed good, but the biggest loophole is that it can't detect vital signs and things that are deliberately hidden, so Wei Youfang asked everyone like this.

"It's okay to monitor the guards, but the range is not large, only two hundred square meters of effective detection range, and a mage can accept the images of up to two surveillance guards at the same time. Phil said.

"But we don't know how many mages there are on the other side, and how many surveillance guards there are, maybe our current footage has been passed on to those guards by the surveillance guards. Wei Youfang listened to Phil's words, and felt cold sweat for a while.

"No, not to mention that the monitoring guards are too troublesome in manufacturing, whoever uses them can only make them by themselves, because it must conform to the frequency of their own mental power fluctuations, and there can't be too many monitoring guards in the same area at the same time, there will be interference between them. In this Dongshan area, it would be good to be able to press at most three or four without interference. Phil explained.

"Three or four is not a lot, one is 200 square meters, this is almost 1,000 square meters. The east-west span of the East Mountain where we are located is only a kilometer, right?" Grady said worriedly.

"And without raising the degree and slope, even if it is a thousand meters long from east to west and a thousand meters wide from north to south, then the area is one million square meters, and the monitoring area of the four surveillance guards is only one thousand square meters, that is, one thousandth of the entire Dongshan, so they can only be arranged in key places, and other places do not need to be considered. ”

For math does not know which warrior tutor taught Grady, Phil explained little by little with rare kindness.

In fact, Wei Youfang was also a little embarrassed, he really hadn't thought about it before, after all, a surveillance guard of 200 square meters still sounds quite big, so Wei Youfang will subconsciously worry that everyone's whereabouts have been discovered.

"Regardless of other places, the two hundred square meters near this entrance rock must be monitored, how can any of you crack the surveillance guards?" Wei Youfang asked.

"Don't worry, it's really possible to monitor the guards, but also be careful that there will be a touch sensing magic enchantment near that entrance, so let's not mess with ourselves yet. Charles, who was obviously much more experienced than the others, reminded him.

Although Wei Youfang is basically familiar with the clothing, food, housing and transportation of the other world, he is naturally still blind to these things, and can only pin his hopes on his teammates.

"In this regard, the mage naturally has a way to crack it, but this kind of invisible thing can only be perceived inch by inch, and I am not afraid of wasting time, the problem is that I am afraid that my spiritual power is not enough, this kind of perception consumes too much spiritual power, we fire mages, you know, these delicate things are good at it. Phil spoke out about his difficulties.

Wei Youfang himself also knows a little bit of mental power, but when he heard that Phil said that it was difficult to get, he didn't say anything to make people laugh at it, Wei Youfang still has self-knowledge.

"What can we do then, do we have any other way?" Wei Youfang said, looking at Charles.

Charles may be a little familiar with Wei Youfang, and naturally he will not turn a blind eye to Wei Youfang's distress eyes, but Charles showed a touch of embarrassment on his face, and said to Wei Youfang: "Don't look at me, I don't have any way, these things are only understood by the group of mages, I am a warrior, I have more knowledge than you, but I really don't understand how to solve it." ”

After listening to Charles's words, Wei Youfang knew that he was not shirking, which made Wei Youfang very headache.

"Actually, it's not impossible, when these devices are triggered, the magic fluctuations emitted are much clearer, and I can sense the location, and then find a way to crack it. Phil said.

"Then what should I do? So, I'll trigger it, you can perceive it, and then if we don't act today, we just pretend to pass by unintentionally, how about it?" Wei Youfang suggested.

Phil shook his head.

"You already know that this is the entrance, even if you act like it, there will definitely be flaws, they may not be able to see it for a while, but this kind of thing is not allowed to think deeply, and you say that we will not act today, so when we come back next time, your friend may have been transferred. ”

Wei Youfang thought about it, Phil did say a lot, not to mention that Wei Youfang is not a professional actor, even if he is a real actor, it is impossible to have no flaws at all, I couldn't see it at the time, but after thinking about it for a while, I can't say for sure, I can't let that friend who has never met take such a risk.

The crowd began to get anxious.

Wei Youfang suddenly thought, no wonder there are no small animals in this mountain, they must have been cleaned up by people in the underground space, and animals should also be able to trigger these items.

"We can use animals to test if it's okay. Wei Youfang asked.

"Of course, but we didn't meet any small animals along the way, so I think they were afraid of being disturbed and cleaned up. Phil said.

"Then let's run farther away and catch an animal, can't we just try it?" Wei Youfang said.

"Of course, there is a chance that it will get their attention, but it seems to be the best thing we can do. Phil thought about it and said helplessly.

Originally, such a force sensing and monitoring guard was just to avoid being discovered by others, and the inventor naturally considered various reverse factors, and it was naturally not easy to break.

"Stay here and keep watching, I'll go catch animals with Grady. Wei Youfang found that there was no other way to go, so naturally he no longer hesitated, and pulled Grady and left.

The two warriors have no problem catching low-level magical beasts, so naturally they don't say anything about small animals.

Moreover, the group of guys in the underground space to clean up the animals on a hill is estimated to have a lot of effort, and the nature in the distance can't take care of it.

Wei Youfang and the others walked a kilometer or two further east, and they found traces of animals, and finally caught a mammal herbivore similar to a fawn.