Steel steam and flame

The three of them stood together, and the induction field light above their heads became stronger, illuminating a wider range.

Cassia asked about the self-circulation of the underground world and got an answer immediately.

"It's not completely self-circulating. Even without the participation of the surgeon, the underground world ecology has always been maintained by the world tree rhizome network under our feet. Don't forget that its essential job is to absorb nutrients from various places and deeper underground."

Slova added at this time: "The large underground world cavities in various places have been continuously providing various materials for surgeons for a long time. But they will not be excessively absorbed, because hunting underground creatures and moving the corpses back to the ground is essentially mining the rhizomes of the world tree. Hundreds of years ago, weren't there records of underground creatures and beasts? The reason is that excessive mining leads to unstable circulation, and the rhizomes of a world tree are over-eaten and cannot be supplemented with nutrients in time. The final result is that the rhizomes cannot be restored in time."

"Later, there were changes. While hunting, necessary monitoring will be carried out to prevent the occurrence of beast tides. This is similar to the way the extreme area is handled. With the Empire The current power is fully capable of completely clearing out the second-class creatures in other areas except the extreme area of ​​the southern forest. All it needs is time and unity among the four forces. "

Cassia sighed at this time: "There is definitely enough time, but it will be difficult for the four forces to unite."

He thanked Kolyuks and Slova for their answers, and continued to ask while taking steps: "Are there any special places for underground creatures? For example, there are special substances in the body, or are there obvious differences from the second-class creatures on the ground?"

The two followed Cassia's steps, thought about it, and shook their heads: "We only hunt and occasionally help carry corpses. Dissecting and using corpses is not what we are good at. After returning, you can go to the factory on the ground to ask. After saying hello to Lord Kles, I think there will be experts in this field to answer you specially. "

The conversation continued, going to various aspects of the underground world. The three of them hurried on their way again. In less than two hours, the undulating terrain disappeared, and a relatively flat underground plain greeted them.

Of course there is no soil here. Even though it is called an underground plain, the ground underfoot is made of hard rock and thick roots that can easily break through the rock and show up everywhere. Occasionally, a piece of fluorescent moss will appear around, clinging to the roots and living by eroding the bark. Apart from that, there is nothing.

"There is not even a mushroom." Cassia thought of Cecia and the various mushroom knowledge that Cecia had excitedly introduced to him. There are mushroom species with extremely strong adaptability and vitality that can survive in various extreme environments. Whenever Cecia talks about this kind of mushroom, she is full of awe and love.

At this moment, Cassia wishes Cecia was here to see this underground plain made of rocks, and then ask in a gentle tone: "Can your mushrooms survive here? The so-called vitality is strong, but the environment is not extreme enough."

It will take some time for this idea to be realized.

In the eyes of Cassia, Kolyuks and Slova, the underground plain they are in is not an extreme environment, but it can be described as harsh. But in the eyes of others, the heavy pollution like a sandstorm, the air full of highly toxic, corrosive substances, and various dangerous microorganisms is enough to kill most of the operators.

And the lightless environment, the physical and mental impact brought by the root network, without a strong enough spiritual body, will not only affect the strength, but also the spiritual will will be likely to collapse.

Thinking stopped at the right time, and when he arrived at the destination, Cassia asked Kolyuks and Slova to wait seven or eight kilometers away from him. A suitable distance, for the strength of both, will have enough reaction time after a dangerous situation occurs.

Cassia found a better position on the underground plain - a rock protrusion like a step, with a huge root next to it - he went to the rock step and sat down, without making light, but took off his clothes in the dark and put them aside to prevent the experiment from scrapping this only set of clothes.

There were a few minutes of calming time, and ten minutes of thinking time.

After Cassia thought everything was ready, the ultimate metal skin on his chest lit up with a fluorescence that kept circulating in color, and finally fixed the color on bright red. He stood up and lay on the rhizome of the world tree so that the "world core" on his chest would be closer to the rhizome.

The posture was a bit strange, but there was no one around, so Cassia didn't care.

The bright red light of the world core gradually spread to his whole body. He then secreted a large amount of keratin, like a huge mouth that could be freely extended by a mollusk, using the world core as a stomach, biting off the rhizome of the world tree that was nearly five or six times its own size, and "swallowed" it towards the world core.

"Buzz..." A slight tremor sounded.

Next to him, Kolyuks and Slova had just found a place to lie down, and now they had to sit up.

"Should we be farther away? In his state, we can't close our eyes at all!" The bright red light didn't give them time to react, and hit them in the face. The slight stinging sensation immediately made them alert, and their expressions became serious.

Looking at the large area of ​​ground suddenly illuminated by bright red light, the two stood up and retreated: "I only knew he was a monster before, but now it seems that he is still a mysterious monster."

"Is this the ability of the land red star?"

"Who knows, it should be, haven't you noticed that the air has become clean? The polluted fog has disappeared!"

At the same time, at the border of the underground world facing the southern forest, an area was illuminated by several bio-electromagnetic field light spots. There is a huge steep rock wall lying quietly, with dense webs of world tree roots on it.

This rock wall has no end above, nor can it see the end on the left and right sides. Like a solid wall, it directly blocks the expansion of the underground world here.

In the range covered by several light spots, an irregular crack tore the rock wall open, and a large area of ​​thick black polluted fog, like another burning flame, rolled out from it.

A dozen people are carrying out reinforcement work around the huge crack. Just beside the crack, there were several piles of corpses of underground creatures. Some were being simply dissected, while others were being used as nutrients and were being artificially "fed" to the roots of the World Tree at the edge of the crack, in the hope that they would grow as quickly as possible and slow down the expansion of the crack.