The three of them stood together, and the light spots on the inductive field above their heads became stronger and the illumination range was further away.

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

"It's not entirely self-circulation. Even without the participation of the surgeon, the world tree rhizome network under our feet has always been the world tree roots and stems network under our feet. Don't forget that its essential work is to absorb nutrients from all places and deeper underground."

Slova added at this time: "The large underground world cavity in various places has been continuously providing various materials for the surgeons for a long time. But it will not be absorbed in a transitional manner, because hunting underground creatures and moving corpses back to the ground, essentially mining the rhizomes of the world tree. Hundreds of years ago, weren't there any records about the underground beast tide? The reason is that the mining transition leads to unstable circulation. The rhizomes of a certain world tree were over-eating and not receiving timely nutritional supplements. The final result is that the rhizomes cannot be recovered in time."

"There were some changes later. While hunting, necessary monitoring will be carried out to prevent the occurrence of beast tides. This is similar to the treatment of extreme areas. With the current power of the empire, except for the extreme areas of Southern Forest, it is fully capable of completely cleaning up the second-class creatures in other areas. All it takes is time and unity between the four forces."

Cassia sighed at this time: "Time must be enough, but unity between the four forces will be difficult."

He expressed his gratitude to Koleux and Slova for their answers. While taking steps, he continued to ask: "Does there be special places for underground creatures? For example, there are special substances in their bodies, or are there any obvious differences from the second-class creatures on the ground?"

The two followed Cassia's footsteps, thought for a while, and shook their heads: "We just focus on hunting and occasionally help with the body. Dissecting and utilizing the body is not what we are good at. After we go back, you can go to the factory on the ground to ask. Say hello to Lord Clays, and I think there will be experts in this field to come and answer you."

The conversation continued and went to all aspects of the underground world. The three of them rushed 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, it is hard rocks under your feet, and thick rhizomes that can easily break through the rocks and expose them everywhere. Occasionally, a piece of fluorescent moss appears around it, attached to the rhizomes and stems to live by eroding the bark. Apart from that, there is nothing left.

"There is not even a mushroom." Cassia remembered Sisia, and the various mushroom knowledge that Sisia had excitedly introduced to him. Mushroom species with extremely strong adaptability and vitality can survive in various extreme environments. Whenever they talk about this type of mushroom, Sisia is full of awe and love.

At this moment, Cassia hopes that Sisia is here too, come and see the underground plains 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 to realize this idea.

In the eyes of Cassia, Koleux and Slova, the underground plains they are in are not considered extreme in the environment, but they can be described as harsh. But in the eyes of others, the rich pollution like sandstorms, full of highly toxic, corrosive substances, and various dangerous microorganisms are enough to kill most surgeons.

The lightless environment comes from the physical and mental impact brought by the root network. Without a strong enough spiritual body, not only the power, but also the spiritual will may collapse.

Thinking and stopping at the right time, Cassia asked Corex and Slova to wait seven or eight thousand meters away from him. A suitable distance would have enough reaction time for the strength of both of them after a dangerous situation.

Cassia found a better location on the underground plain - a stair-like rock bulge with a huge exposed rhizome beside it - he went to the rock stairs to sit down, instead of creating light, he took off his clothes in the dark and placed them aside, in case the experiment was used to scrap the only clothes.

There are several minutes to calm down and ten minutes to think.

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

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

The bright red light in the core of the world gradually spread throughout the body. He then secreted a large number of keratinous bodies, like a molluscs that can be stretched freely. He treated the core of the world as a stomach bag, bite the rhizome of the world tree that is nearly five or six times its size, and "swallowed" towards the core of the world.

"Buzz,,," a slight tremor sounded.

Next to it, Colux and Slova found a place to lie down, and then they had to sit up.

"Should we be farther away? We can't close our eyes at all in his state!" The bright red light did not give time to react, and hit the two of them head-on. The slight stinging sensation immediately made them alert, and their expressions became serious.

Looking at the large area around him that was suddenly illuminated by bright red light, the two of them had already stood up and retreated: "I used to know that he was a monster, but now it seems that he is still a monster full of mystery."

"Is this the ability of the Red Star on the Land?"

"Who knows, probably, right? Didn't you notice that the air has become clean? The polluted fog has all disappeared!"

At the same time, the underground world here faces the border of the southern forest, and a place is brightly illuminated by several bioinductive force field light spots. There is a huge steep rock wall quietly lying across it, with dense mesh rhizomes of world trees.

This rock wall cannot see the end above, nor the ends on both sides. It is like a solid wall that directly breaks the expansion of the underground world here.

In the range covered by several light spots, an irregular crack tear the rock wall into a hole, and a large area of ​​rich black polluted mist shaped like another kind of burning flame, gushing out from it.
Chapter completed!