4. Tissue Regeneration: In order to transport ground units of insect swarms on any battlefield or on the ground, the tunnel worms can be infinitely extended through the guò on-demand tissue regeneration function. Because it is connected to the tunnel network, it can provide the tunnel worm with the nutrients it needs to expand and replicate its cells with a simple command. The excess tissue is assimilated and absorbed again after the tunnel worm returns to the tunnel network.

5. Fungus glands: Although tunnel worms produce a large amount of rubble and rubble when digging, they dispose of this waste in a very efficient way. First, the crushed rock and soil are covered in a corrosive bacterial blanket secreted from the glands in the mouth of the tunnel worms. When the rocks and soil are liquefied, they are transferred to a special layer below their epidermis through a pair of glands, allowing the tunnel worms to support the tunnel with their own epidermis and skeleton.

If Behemoth and Leviathan are the space carriers of the swarm, then the Tunnel Worm is the submarine passage of the swarm, which can create underground passages in the planetary environment to transport Zerg troops.

Imagine how the enemy's commander would feel if he launched a sneak attack based on tunnel worms on the flanks and rear flanks while cooperating with the ground forces in the environment of a planetary landing battle.

Tang Fang felt that if he was replaced by himself, he would definitely not be happy.

The cost of the insect network is 150 crystals, 200 gas, and like the spinal needle crawler, it does not occupy the population.

Next is the three bases of the Zerg, the main nest.

After upgrading the Zerg base from the wormhole to the main nest, you can unlock some upgrades and a new Zerg flying unit, the Flying Snake.

Upgrades include the puppy's "Evolved Adrenal Gland", which is also known as the "Mad Dog", and the Zerg Units related to the Evolutionary Cavity and the Minaret are also unlocked.

As for the Flying Snake, the Flying Snake inherited the support role previously played by the Scorpion of the Zerg, and the Flying Snake gathered several vicious biochemical weapons to weaken the enemy's combat power and provide the Alien with a battlefield advantage. These flying units contain a thick layer of microbial mucus in their abdominal cavity. When ranged units approach, spray a vicious mixture of liquids in the air, rendering enemies ineffective in a toxic mist area. Enemies who try to escape to high ground are quickly pulled back by the Flying Serpent's powerful nasal tubes, allowing the Worm to gain an advantage over any terrain. When wounded, the Flying Serpent can absorb biochemical power and nutrients from other Alien buildings, quickly heal the damage it takes, and return to the battlefield to continue the battle

The main structure of the flying snake consists of 5 parts.

One, elastic tail: The function of the flying snake's tail is basically similar to that of its prototype polluter (scorpion). However, it has evolved to allow the Flying Serpent to maintain balance and maintain direction while flying, and even to steer. However, the most peculiar structure of the flying snake's tail is the crystal spikes that grow inward on the surface of the tip of the tail. These "crystals" emit powerful pulses that allow the flying snake to locate its target with unmistakable accuracy.

2. Jagged forelimbs: Despite their scary appearance, the insect chooses to remove the aggressive function of the forelimbs, so that it only has a simple auxiliary grasping function. The protruding spikes are made up of porous bony structures and connect directly to the lymphatic system of the flying snake. Allows it to pierce and immobilize prey without causing fatal damage. While sneaking, the spikes release pheromones, causing poor prey to mistake the flying snake for a harmless and non-threatening creature.

3. Diseased blood: Polluters (scorpions) are derived from aggravated carcinogenic pathogens, which are essentially remnants of genetic fragments from other alien insects. This primitive support weapon is dangerous to both enemies and insects themselves, and degenerates into useless organs after the Battle of the Brood. Now, due to the need for specialized new clades of alien insects, it appears that they are using the gene pool of some unknown species to re-examine and refine the polluter as a flying snake, preserving important functions. And the unnecessary lethality is eliminated.

Fourth, the nose suitable for grasping: This elongated organ is the digestive system of the flying snake. It can stretch up to the entire length of the snake's body, and like a frog using its tongue to catch its prey, the snake will forcefully pull back the elastic intestine, grab the target and drag it back into its body

5. Tissue absorption: The flying snake can break the ion chain in the sclerotic tissue of the insect hive to make a nutrient-rich liquid. This liquid activates a large number of microorganisms in the blood of the flying snake to generate and replenish the biological energy of the flying snake.

The Flying Serpent is positioned as a secondary unit. It has almost no attack ability, but its 3 skills are very powerful in battle mode, and they do not need additional upgrades, which are "Devouring", "Kidnapping", and "Blinding Poison Cloud".

"Devouring" is to exert the characteristics of tissue absorption, and absorb the ion chains in the hardened tissues of the Zerg building to increase energy and health.

"Kidnapping" is the process of dragging the target to the location of the Flying Snake. Arena control in PvP mode.

"Blinding Poison Cloud" turns the attack range of ground units and buildings under its cover into melee combat, which can be described as the nemesis of ranged units.

In terms of cost, it requires 400 crystals and 800 gas, occupying 3 people, which is 4 times that of the game, and presumably more than 40 meters long.

Tang Fang felt that the flying snake would have a miraculous effect if it cooperated with the queen to deal with the army, and if it was to deal with the threat in the air, it would be a little overstretched, and the skill of "kidnapping", which is very effective in the battle, is simply chicken ribs in reality, because the smallest frigate in the warship system of human society is also more than 100 meters, and the "kidnapping" of the flying snake will at most deal with small-volume units such as aerospace fighters, various types of drones, and shuttles, and it depends on whether people give it face.

Although the appearance of the Flying Snake does not bring about the upgrade of the combat effectiveness of the Air Force, the appearance of the main nest is very timely, and the war between the Star Alliance and Monya and Sulu may start one day, and the "Anubis" Legion of Black 7 is also eyeing the side, and the Corruptor and the Wyvern are the main combat units of the Air Force under them, and they urgently need to improve their combat effectiveness again.

Thinking of this, he first pressed the button of the wormhole to evolve into the main nest, and then spent 2000 crystals and 2000 gas to add the puppy's "evolutionary adrenaline" to the upgrade list, and finally transferred to the menu bar of the spire, looking at the unlocked "Evolved Flying Creature Attack Level 3" and "Evolved Flying Creature Carapace Level 3" in a daze, and sighed bitterly.

The two upgrade projects require a total of 11W crystals and 11W gas, and the total resources are only 1069345 and 168014.

He remembered that Tang Lin had collected a total of 3 tons of zero elements when he was cleaning the Stygian Bat-class destroyer, and the reserves of zero elements of this level were quite high for a destroyer. But for him, it is only 3,000 gas, even if you add the "dark bat" in Behemoth's belly, it is no more than 6,000 at most.

The resources of the "Dryad" reached a terrifying 20,000 crystals and 12,000 gas, and he believed that there must be more than one "Dryad" in the "Akron" formation, but after experiencing the fierce battle just now, he did not want to be enemies with other "Dryads" in such an underground environment. Even though they have extremely high resource value, there are zero-element veins distributed in the strata.

Among the other ways to obtain zero vegetarians, the most convenient and also the most prolific is to knock the government on the bamboo pole, you must know that he has just graduated from Adam? Oliver and the military industrial enterprises have nearly 10,000 tons of zero elements in their hands, and it is a bit inappropriate to obstruct them so quickly, so they have to wait for the Star Alliance, Mengya, and Sulu to really fight, and then go and make a profit.

Since you can't rip off the bamboo, there is another way - buy! bought it with the 800 billion yuan in his hand, but the market is not very good if he buys it now. Because all countries are actively stockpiling zero-element resources to expand their armaments, the price of zero-element has risen sharply recently.

It's not good, that's not good, he was a little upset for a while.

Otherwise......

"Tang Fang, what are you doing? If it doesn't come out again, the river will fill the hole. ”

Just as a flash of inspiration flashed in his mind and he thought of a good solution, Zhou Ai's voice sounded in his ears, and he looked back hurriedly. I saw that the water reflecting the sparkling waves in the light had risen to Thor's chest, and in a few moments it would flood the cockpit.

He hurriedly took the suffering Thor back to the system space and handed it over to SCV for repair. Then summon a wyvern and hold its body out of the "Water Curtain Hole" and return to the fire platform.

Zhou Ai had already disembarked from the banshee fighter, and Roy sat on the ground, his face pale without a trace of blood, holding a compressed biscuit in his hand as if he had not eaten enough in eight lifetimes. The two cheeks are bulging and bulging, like a pair of meat balls.

"Dead?"

Tang Fang nodded: "It's dead." ”

Despite her guess, the girl breathed a sigh of relief, looked at the river that stretched into the darkness, and said, "Go back, I don't want to stay here any longer." ”

Several rocks fell between Behemoth and the surrounding stone walls. Falling into the river made a splash, and there was a strange smell in the air, and the moisture soaked through the clothes, and it was uncomfortable to stick to the body.

Tang Fang agreed, put away the ground units of the human and god clans on the fire platform, released an observer, and investigated the current structure of the Great Cavern along the gap between Behemoth and the surrounding stone walls, looking for the tunnel that passed through when he came.

About five minutes later, a piece of news came - bad news.

His worst fears had happened, the tunnel to the surface had collapsed in a large area in the turmoil just now, and the entire rock formation had been crushed.

"The tunnel we came in collapsed."

He summoned a nurse, MM, and threw a bottle of vitamin drink to Roy, who was choking on compressed biscuits, and told the bad news with a gloomy face.

Zhou Ai subconsciously said: "So, we are trapped here? ”

Tang Fang nodded, and shook his head again: "If you use the insect swarm, you still have a chance to get out of danger, but it will take a lot of time, and ...... Some are dangerous. ”

Cockroaches are good at burrowing, they can dig a tunnel to the surface, according to the number provided by Emma, the location is now about dozens of kilometers from the bottom of the sea, if the cockroach is used to dig with all its might, it should be completed in half a day.

This is not the key, the key is that after the tunnel is dug and the strong water pressure in the abyss area, how do they go up? The Nighthawk deployed on the fungus blanket island just sent a message that due to the violent plate movement of the three people fighting the "dryad" underground, the lower part of the fungus blanket island had collapsed, and now it has drifted away from its original position.

Before arranging the fungus blanket island, he had asked Emma to analyze the topography of the bottom of the sea, and it can be seen from the model map that this abyss is due to a violent plate impact, one plate subducts during the impact, and a plate lifts up, forming an abyss structure, and even the formation of a large hole in the ground is also the result of plate impact.

During the battle with the "Dryad" just now, its root network opened countless honeycomb-shaped tunnels in the nearby strata, causing the geological structure of the entire area to be extremely unstable. Moreover, even if the tunnel to the bottom of the sea is safely opened, the difficulty of building a fungus blanket island from the abyss upwards and building a fungus blanket island from the water surface is not at all the same order of magnitude.

Zhou Ai didn't ask much, because she knew that Tang Fang had always considered the problem comprehensively, since he said that there was danger. It must not be safe, so he frowned and said, "What then?" You can't stay here...... By the way, we haven't been back for so long, will Tang Lin, Tang Yun and the others on the Hercules transport plane be in a hurry? ”

"I've told the pilots of the transport planes to tell them that they have a little trouble underground, and that they may have to be delayed for a while."

Minor troubles...... Roy burped, looked around, and said that this was a small trouble, thanks to Behemoth's support for the rock formations around which they were about to collapse, otherwise all three of them would have been buried alive by rubble. Burial of the "Dryad".

At this time, Tang Fang looked at the direction of the river valley and said, "There is a way, go." "Jump down the valley and swim down the river to the other end of the river.

Roy hurriedly put on his mask and followed Zhou Ai along the river with Zhou Ai, leaving the Great Hollow area. Enter a dimly lit, murmuring underground valley.

I don't know where these come from. I don't know where to go, the flowing water is not cold, on the contrary, it is very warm, like the sea water that is warmed by the sun in summer, suitable for swimming, but the three of them are not interested in playing at this moment, after leaving the big hollow. The river became narrower and narrower, and the water almost filled the tunnel, and it became more and more rapid.

Tang Fang summoned a king worm and asked it to immobilize the three people with its whip to prevent them from being washed away, and moved along the turbulent water and the narrowing river.

I don't know how long it has been. According to the speed of the king insect, it is inferred that it is about 100 kilometers away from the position of the big hollow, and the river becomes a little more open, according to the number of terrain transmitted back by the detector, there is a bend in front, the king insect's swimming speed slows down, and a pursuer appears in the water, shooting out 3 blue beams of light one after another towards the stone wall at the bend, opening a cave more than half a person high, and the king insect shakes the whip and pushes the three people into the cave.

Once they have gained a foothold, they retract the King Worm and the Stalker, summon another mechanical sentry, place a force field at the entrance of the hole facing the river to block the flow of water, and then order the mechanical sentry to continue digging a tunnel forward using the disintegration ray.

The water level was slowly lowered due to the expansion of the tunnel, and the bodies of the three people were able to drill out of the water, Roy turned on the searchlight of C-20A, shining on the stone wall overhead, there were condensed water droplets falling, hitting the surface of the water and making a ticking sound, looking back at the entrance of the cave, the transparent position was clear flowing water, as if the aquarium was a scenic spot, but there were no beautiful or vicious fish.

Zhou Ai and Tang Fang walked side by side, staring intently at the rapidly expanding tunnel under the action of the disintegration ray, still not asking why, it is certainly a happy thing to be able to return to the ground, but it is also a pleasant thing to be able to explore underground with him, she likes to take risks, especially with the person she likes, of course, it would be more perfect if there was no light bulb in the back.

Ten minutes later, the tunnel had expanded to nearly a kilometer, and the water that had poured into the cave had fallen back to the knees.

At this time, the mechanical sentry stopped digging and opened another tunnel on the stone wall on the left side of the tunnel that was large enough to accommodate 3 people, and the Tang side beckoned 3 people to hide in the tunnel, retracted the mechanical sentry, raised the C-20A to replace it with an armor-piercing grenade, and pulled the trigger towards the stone wall at the end of the tunnel.

The armor-piercing grenade pierced through the stone wall, initially leaving a bullet hole tens of centimeters long, and some cracks around it. In the next second, water seeped out, and in just 2 breaths, with a bang, the stone wall collapsed, and the surging flood water poured into the tunnel wrapped in rubble, causing the water level to rise rapidly, and it filled the entire tunnel in a few moments.

Tang Fang greeted the two people, drilled out of the pit, and swam into the underground river at the end of the collapsed stone wall.

Zhou Ai and Roy followed closely behind, drilling through the breach in the stone wall, and suddenly felt a lift force coming from under them, and the turbulence surging upwards pushed the bodies of the three people to climb rapidly.

This long river is very different from the previous underground river valley with a large hollow, it is not a reciprocating underground water vein, but a waterway that leads directly to the bottom of the sea, Roy was puzzled, and asked about the origin of this waterway, so Tang Fang relayed Emma's explanation.

In fact, in addition to some shallow groundwater, the groundwater system is also distributed in the deeper mantle of the planet, and the amount is even larger, and there are two sources of water in the mantle.

The first source is that minerals contain some free hydrogen, and when these hydrogen and oxygen meet, they react chemically in the underground environment to form water.

The second source, the collision of oceanic plates, causes a large area of stratigraphic fractures, and the subduction of the plates also carries seawater into the ground, resulting in deep water accumulation.

In this context, after hundreds of millions of years of evolution, the water in the mantle accumulates more and more, and because of the intense underground activity, the deeper the stratum is the stronger the pressure, once there is a crack due to geological movement, the water in the mantle will rush from the depths to the ground like confined water, the above is the origin of this long river.

Roy praised: "Brother Tang knows a lot. ”

Tang Fang's face was not red or panting, and he said, "That's." ”

Zhou Ai snorted coldly and said that he was shameless, and only a stupid boy like Roy believed his lies.

Tang Fang laughed a few words, hiding the embarrassment on his face, although he was covered by a mask, he was not afraid of being seen.

………… (To be continued......)

PS: Thanks to Honey Sauce, Pegasus Meteor Cannon, and Baishan-kun for your tips