On the ground, more than forty earth magicians spread out and surrounded an area of ??the city. Directly below this area was the location of the altar cave. Seeing that all the mages were in place, Audrey pulled out her sword and raised it to the sky. The powerful fighting spirit turned into a radiance, broke out of the body and shot straight into the sky, shooting to an altitude of more than thirty meters before suddenly exploding. The light emitted by the aura made the entire city clearly visible even in broad daylight. This is a signal. Seeing the light of Qi, all the magicians who were ready to release their magic power together. The area they surrounded was distorted and deformed by the vibration. The roads and houses on the ground collapsed and collapsed, turning into ruins. , the earth cracked and the earth shook. Finally, the entire area collapsed into a huge pit. The top of the cave where the altar is located is more than a hundred meters above the ground. The weight of this more than 100 meters thick soil is measured in billions of tons. In the face of absolute weight, no matter how solid a substance is, it is as fragile as tofu. The two batches of constructs located at the two entrances were the first to suffer. The cave wall collapsed and swept them down like running water. Under the squeeze of huge force, these constructs were like grains under a stone mill. , was crushed to pieces. A huge deep pit suddenly appeared in Black Iron City, but the geology around the pit was not too damaged. The rumbling sound caused by the collapse of the pit took a long time to stop. The raised dust filled half of the city, and the momentum created spread to the outside of the city, overwhelming the momentum of the barbarian attack. Many barbarians Looking into the city, they looked at each other with extremely curious expressions. Great Chief Bakrov flew directly into the air and looked in the direction of the pit from a distance, but he could not see clearly what was happening. Audrey let out a long breath. The control tower had been detecting the movement underground. At the last moment of the collapse, the invading constructs had not yet left the scope of the cave. They were definitely buried in the soil now. Pressed down by hundreds of millions of tons of soil, an iron ball can be crushed into a discus. Unless a miracle occurs, those constructs will be dead. The most important thing is that the altar will definitely be destroyed. In this way, the plane connected to the altar will no longer be able to send any creatures to invade this world. Now that the matter has come to an end, in retrospect, Audrey is still frightened. The barbarian siege is not terrible. There are sophisticated weapons and armor forged from human steel, well-organized war machines, and a huge population base. It would be a miracle for these barbarians who couldn't even put on clothes to capture the Black Iron City. Even though there are shadows of human conspirators behind these barbarians, Audrey is still not afraid. There are 700,000 humans in Black Iron City, with hundreds of years of history, and huge potential for war. Even if these barbarians cannot be driven away, It can drag them down, drag them down, and drag them to death. But the world connected by the altar's plane channel is an unknown force. Audrey doesn't know how many people there are in that world, how far the civilization has developed, and what kind of war capabilities it has. The only thing she can know is, Five or six of these goblins driving constructs can put a great swordsman like her into a panic. If there were thousands or ten thousand of these constructs, the entire world would be in danger. Even if the Black Iron City cannot be defended, these enemies will never be able to stand firm. Although she knew that nothing could survive under such heavy pressure, Audrey still felt uneasy. She looked up in the direction of the control tower. The collapse of the cave has stopped, and the detector should be able to detect the situation below. Sure enough, in the direction of the control tower, a swordsman ran out quickly, flew directly into the air, and flew in the direction of Audrey. However, the solemn expression on the swordsman's face made Audrey feel something bad. premonition. "Report, there is a huge hole under the mud layer at the place of collapse, and there is a strong life reaction there." The swordsman said with a short and horrified tone. As soon as the swordsman finished speaking, the mud layer at the bottom of the pit suddenly exploded. A huge amount of soil was lifted up, and now there was a bright red light of energy below. "No, it's the altar's energy field. It blocked the soil." As soon as Audrey saw the energy light, she immediately realized what was going on. When the altar was running at full speed, thirty-six The energy pillar builds a circle of energy barrier, which can block the collapsed soil around. The soil relies on its own weight to exert its power, rather than directly impacting the energy barrier. When most of the soil is blocked to the surroundings, the downward pressure is reduced by more than half. This also means that all enemies within the energy barrier will be fine. Sure enough, after the surface layer of soil was lifted off, it was revealed that it was supported by an energy barrier.? Huge void. One after another, mechanical structures flew out of the hole. One, two, three more than fifty flew out. Audrey's face turned pale, even more than what she had seen when she left. It was obvious that she came from the plane passage later. There were barbarians invading outside and constructs raging inside. Black Iron City could be saved. Live? Audrey felt that there were too many constructs, but the goblin captain had a completely different feeling. Their losses had been great. There were one hundred and one mechanical structures in a team, but now there were only more than fifty left, half of which were lost. Under normal circumstances, a 10% battle loss is enough to collapse the average army. Those who can sustain a 30% battle loss are definitely the best among the elite. But now, they lost 50% without even seeing the enemy's face, but everyone did not collapse, but were furious. The enemy did not defeat them head-on, but used despicable means. "Wow!" The energy barrier that supported the first wave of mud layer finally couldn't bear it anymore and disappeared. The surrounding soil poured out like a flood, burying the altar completely underground. Now, they have no way out.