Chapter 398: Underground war

The turbulent wave of insects is still constantly impacting the open energy barrier of the planetary engine fortress. Just the pile of zerg debris has already risen more than ten meters high in front of the barrier force field.
It is almost doubtful that if this continues, the entire Shanghai will be flooded by the sea of ​​insects along with the energy barrier, which can be completely done in terms of the number of insect swarms. Of course, the premise is that the barrier force field can still support that time.
A large number of jumping insects climbed directly onto the barrier force field, which caused greater damage to the energy barrier by expanding the contact area.
This made the entire Shanghai fortress look like an anthill, not only surrounded by a group of flying dragons like a black cloud, but also a dense crowd of jumping insects crawling around on the energy barrier, trying to drill into it at any angle.
If people with dense phobia will be driven crazy by this scene, even if the soldiers inside the barrier shoot out with their eyes closed, they will be able to hit the dense jumping worms outside and let them fall off the barrier like dumplings. Fall down.
It's just that their main task is not to destroy these seemingly endless jumping worms, but to focus their firepower on killing poisonous explosives mixed in a large number of jumping worms.
Unlike the relatively primitive canine claws of Zerglings, the self-detonation of poisonous explosives will obviously cause greater damage to the energy barrier, especially the high-intensity corrosive acid produced during their self-detonation, which is far more than the claws of Zerglings against the barrier. The threat is even greater.
Therefore, even if a large number of jumping insects are allowed to climb up the barrier force field, the Stray Earth Forces do not allow poisonous explosives to have the opportunity to approach the energy barrier, and order the sniper to shoot as precisely as possible as far away as possible, and will be infantry if they approach. Focus on fire priority to kill.
Even so, a small number of poisonous insects successfully hit the barrier force field to detonate themselves, splashing acid onto the barrier, continuously eroding the energy barrier.
"The integrity of the barrier is 87%, and it continues to suffer!"
At this time, Keystone's recharge progress has just reached 12%. At present, it seems that this rate of wear and tear is acceptable.
However, Qiao Li is very clear that although the number of these zergs present is huge, the blade queen is actually trying to fool the cannon fodder of the star.
If it is the elite main force of the Swarm, it should be a large group of thunder beasts that are hitting the barrier force field, and there should be a large number of nest lords in the sky, as well as the flagship Leviathan of the Blade Queen, not just the flying dragon, Jumping worms and poisonous worms are so simple.
At this stage, the wandering earth still needs to see the move, wait as much as possible for the Zerg's main force to land, and then use the keystone's Nova shock to destroy it in one fell swoop!
While the zerg outside was still continuously impacting the barrier force field, an unusual vibration suddenly came from under the ground, as if a huge monster was moving down and down the ground.
"Unknown earthquake motion detected, tunnel worms coming!"
The voice did not fall, a horror creature like a giant sand worm broke out from the ground, opened its mouth and spit out numerous zerg forces from the inside, bypassing the barrier force field from below and directly entering the Shanghai fortress.
That ’s the Zerg worm. This giant sandworm-like creature can stretch itself to an amazing length, so that it can use its flesh and blood to form a channel in the ground, allowing the swarm to rely on the channel ’s creep and chemical stimuli to quickly Speed ​​travels inside, posing a huge threat to areas that were previously considered safe.
The barrier force field of the planetary engine fortress cannot be extended to the depth of the ground, which means that the zerg spit out of the tunnel worms can directly connect with the human troops, which is their best area.
The city's garrison bombed the tunnelworm's head in the first place and tried to eliminate it in the shortest possible time.
Even so, the tunnel worms still spit out a large number of zerg units and started street fighting with humans in the urban area of ​​Shanghai.
And there are more than one tunnelworm like this. If they are allowed to continue transporting Zerg troops inside, the barrier force field that covers the entire Shanghai will be useless!
Facing this situation, Qiao Li immediately ordered:
"Drilling beast, it's your turn!"
Obtained a prototype from the Cybertron planet, and used it to drill a beast while mining an energy crystal from an asteroid. Now it is once again used by Wandering Earth as a machine of war.
This iron worm, like a dragon, burrowed into the ground like a tunnel worm, relying on a serrated cutter head on its head to devour and crush soil, rocks, and everything else.
Under the ground, the drilling beast is like a fish, and the stray earth can dig so many complicated tunnels in a short time, thanks to this huge steel worm.
Just don't think that the drilling beast can only be used as a shield machine. Its whole body is covered with sharp serrated blades. It can dig the tunnel at high speed, and can break up everything like a meat grinder. thing.
The tunnel worm stretched to the soft body in the ground is undoubtedly the best target for drilling the beast. While it is transporting the zerg force in the body, it uses a high-speed rotating sawtooth cutter to intercept it and cut it off!
Unlike the drilled beast with its steel bars and blades, almost all the tunnel armor's armor is grown on the head. The body has to be as soft as possible in order to extend indefinitely. It can absorb vibrations from the ground, but Unable to stop the steel teeth and iron mouth of the drilling beast.
Under the ground, the drilling beast easily broke the bodies of several tunnel worms, and even when the tunnel worm tried to fight back through the large mouth of the blood disk, it was able to roll the serrated blade on its body to make it inaccessible, and in turn bite the tunnel. Worm soft body.
The existence of this horrible steel worm makes it impossible for tunnel worms to continue to penetrate further. The longer their bodies are pulled, the more likely they are strangled by the drilling beast under the ground ~ EbookFREE.me ~ so tunnel worms can only He immediately broke through the barrier force field and emerged from the ground. He would rather bear the fierce fire on the ground than be bitten by a drilling beast under the ground.
In this way, the role of tunnel worms is greatly limited, and it is impossible to carry out raids behind enemy lines. It can only reluctantly bypass the barrier force field to allow the swarm to enter the barrier.
It's just that even if they successfully enter the barrier force field, there are still a lot of fortifications awaiting them in the urban area of ​​Shanghai.
There are human machine gun positions on each street, and a large number of small light towers are densely packed like electric poles. The zerg troops transported by tunnel worms are trapped in the quagmire, and there is no chance to approach Shanghai No. 1 where keystone is placed. engine.
In this underground war, Wandering Earth relies on drilling beasts to gain an advantage, and the Zergs are best at raids in tunnels. This is no chance to come in handy!
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