"Who, who." First raise your shield to protect your body, carefully observe the surroundings, and confirm that there are no creatures around you. In the dark environment, there is no source of the sound. Mobak complained loudly, "Damn it, if you have the ability to come out, what's the ability to hide."

"Shut up." The cold Mia glared at him fiercely, "The person who is talking is not here. Have you ever seen the magic of sound transmission?"

"Huh? It turns out it's sound magic." Mobak scratched his head. The great dwarves disdained to understand such mysterious things as magic. Well, I must be disdainful.

"Of course not, it's just similar, achieved through other methods. And the pronunciation is repeated before and after, and the sentences are looped over a few words, it can only be a message. Shuer, have you woken up?"

"I can't sleep while walking, of course I've been awake all the time, but I just wanted to maintain the magic technique and I can't be distracted. I'm listening to what you said." The light shield around me had disappeared at some point, and the floating sacred scripture fell back to my palm. Xiu finally had time to observe everything around me.

It can be said that this is another reduced version of the underground city, the same hemispherical cave and the same internal building, but there is only one floor here, and the scope is much smaller.

"No, the top is not hard glass. Whether it is above the head or under the feet, it is sealed with metal. This is definitely one of the most important institutions." Shuer pointed to the top of his head. "Think of all, this kind of daily activities in underground cities is entirely supported by energy, and strict defense is inevitable. Mia, the location of the energy supply equipment."

"The eight buildings, the third one in the left has a high energy response. The problem is that the end point of the backup energy pipeline is the fourth building."

The same hemispherical building has the same curved outer wall, but it always looks stronger.

"Transfer node?"

“I’m talking about the ‘final’ end point.”

"Okay." Shuer nodded, "There is no need to guess randomly, just go over and take a look. Everyone, the warning level is reduced, and the first level of warning is enough."

"Boss, there's no problem." Although the alert level was reduced, it was burned once and just witnessed the entire process of Shul being attacked with his own eyes. Marca Jaylen dared not take it lightly anymore and never left the team.

"It's closed, there's no gap. Obviously there's chaos outside, but it's not affected and it's still normal, so the safety factor is very high. Well? There's indeed a high energy reaction here, and the temperature has risen."

Indeed, although the houses are made of stone and metal and the walls are very thick, a heat can still be felt through the walls. If this is really the location of the main energy supply equipment, the city may be blown up at any time by this level of energy spillover.

"Mia, Militi, protect yourself."

Although there is no need to worry too much about the existence of strange enemies, the closer you get to the house, the more violent the energy you sense. Shul had to be extra careful, fearing that any movement was wrong and detonating the scorching energy inside.

"Mobak, guard the entrance, Moria, the periphery, Militi, back against the wall to support you three, stay outside."

A high safety factor is relatively high, so you must beware of the rear path being cut off at any time.

"Others, come in with me, Marca Jaylen."

"The door has been opened, I'm professional."

"What is this type of door structure, physical lock?"

"No, the kind that mechanical controls shrink to both sides, without locks, is controlled from other places. I used the bucket air to directly control the inside through the wall..."

"Uh, no need to go into details." Shure interrupted the halfling's cheerful introduction, "Mia, ready to suppress the energy inside at any time."

"There is insufficient strength, it is too difficult and the possibility is not high."

"I know, I will assist."

"That's not a big problem, come on, I'm ready."

"Swish", this time, the metal door slid silently into the walls on both sides, without making any harsh noises. It seems that the high temperature minimizes the moisture in the environment, allowing the metal to temporarily escape the fate of rusting.

"Tsk, this structure is really..."

There is a second metal wall inside the door, with a radius and outer layer being two meters apart, leaving a corridor between the two walls. In desperation, along the corridor, going to the opposite side of the entrance, and passing through the second door, you can see... the third metal wall.

"These frogmen really know how to design. Are they going to create a maze?" After a long turn, he detoured the third door. The half-hearted man was like Mobak possessed, and he couldn't help but complain in a low voice, "If it opens another wall, that would be interesting."

"It shouldn't be. Their design seems to be guarding against something, definitely not guarding against explosions and isolating temperatures? It's not very similar." Shuer found that Makajren was looking at him with inquiring eyes and nodded, "No matter what they are guarding against, the three metal walls are almost the same. Let's see what they use as energy."

As soon as the door opened, bright light shot out. The strong light was unblocked, and the thorn made people's eyes hurt. As the strong light rushed out of the door, there was also an astonishing high temperature. Even when standing at the door, the skin on their faces was still burning hot, and even the hair on their sideburns was slightly curled.

"So bright." Suff behind Shuer was the last one to react. Even with glasses, her vision was still very insensitive. The girl rubbed her eyes and tried to see the scene behind the door clearly, but she failed in the end, "Shuer, what is it, gurgling?"

"I heard it? It's magma." Seeing everything in front of me, even Shuer stayed for a few seconds, and said with his mouth twitching, "A underground crater, a natural magma pool. These people really have the imagination and actually use geothermal energy to supply energy directly."

Indeed, this is the source of energy for frogs.

The magma pool with a diameter of over 100 meters exudes a terrifying high temperature. Fortunately, it is the physique of professionals. If it were the indigenous frogmen, they would have been burned by the heat waves long ago.

Around the magma pool, frogs built a large number of mechanical equipment. Although they did not know the specific functions, they must have used them to convert geothermal heat into available energy.

"I probably know the purpose of the first two buildings." Mia seemed particularly relaxed. The elemental mage was always accompanied by violent energy. This level of high temperature would not make her feel uncomfortable.

"Well, the site for replacing special equipment such as thermal insulation clothing should be the water storage station, which specializes in supplying water and cooling the equipment here." Shuer nodded, "Go and go out."

"Well, go out." Mia nodded in agreement with a expressionless face.

"What? Let's go now?" Marca Jaylen was startled and said in surprise. "Aren't we going to restore energy supply? Don't we check these devices?"

"You are a mechanic yourself. Do you think they may still be useful? If the equipment working at high temperature loses cooling water, it means that it has been declared dead. It is a waste of time to check again. Moreover, even if there are really one or two that can be rescued, it may be seriously damaged. This type of energy conversion equipment Pavadiga is rare. You can solve small problems. This big problem is not much different from making a new one. Will you repair it?"

"Okay, no." Halfling had to admit that what Shuer said made sense. He just observed it quickly and all the equipment had been shut down, and most of them had traces of burning from the appearance, and there was no room for recovery. "What should I do?"

"Sasa, can you break the wall? Forget it and stop trying, go back the same way." Two layers of metal sandwiched with a layer of insulated rock, and a wall was at least one meter thick. It was not that it could not be broken, but it was meaningless.

"Don't worry, there is still hope. Don't forget that there is a building next to it, which is the end of the energy pipeline. Mia, here..."

"Theoretically, the energy here is also to be transported there, which is the end of the pipeline. However, there is no energy output here now, so there is no way to prove it."

Although Shuer said that there was still hope, even he himself was not optimistic about the so-called hope.

Geothermal heat is almost inexhaustible energy. Since it has the ability to convert geothermal heat, there is no need to manufacture other energy supply equipment, and the possibility of restoring energy for cities is already slim.

However, not letting go of each one is one of the tenets of the shadow-seekers. Even if there is only one percent hope, you have to try it. If you really can't do it, you have to spend a lot of effort to explore the city.

However, when you see the fourth building clearly in the dark, you don’t see hope, but weirdness. The shape is no different from other buildings, at most it is bigger. However, unlike other buildings with metallic appearance, this building has rough appearance, gray, and has no aesthetic at all, like shoddy inferior products.

Tempting the wall, it seems that roughness is not just a visual effect, but also a feeling of not smoothness when touched. Moreover, the overall building is like this, obviously it was done intentionally.

"This is a little strange." Shuer turned around the wall a few steps, frowned and thought, "Mobak, what material is the metal outside?"

"This thing can be made from chromium-nickel alloys, but the raw materials are not very common." Mineral experts often only need to hit a few times to determine the approximate composition of the metal.

"What about this?" Shuer patted the gray wall behind him, "It should be other metal."

"This is strange, it's lead alloy." Mobak touched his beard and said with a joke in his tone. "This alloy has very low hardness. I can smash a hole with just one punch. I really don't know why they used it to build a house. It's simply..."

"Wait, do you think this is lead alloy?" Shuer suddenly clenched his fists and his eyes shining. "Are you sure? You'd better confirm again."

Regarding the conclusions of his teammates, Shuer rarely makes repeated confirmation requirements like he is now. Only the most important link will he be as cautious as he is now.

"Uh, I'm sure." Mobak punched the wall twice this time. As he said, there were two shallow depressions on the wall.

"Ha, if it's lead alloy..." Shuer licked his lips and smiled brightly, "You should have heard of Curse Metal."
Chapter completed!