The barbarian siege also exposed many defensive problems in Black Iron City, the most serious of which was the lack of heavy weapons. Fortunately, we encountered barbarians and they also had no heavy weapons. If the opponent has three or five magic crystal cannons, setting them up in the wild and firing them slowly will be a headache. If the heavy magic crystal cannon is moved onto the city wall, it will be inconvenient to move and turn around. Fixed magic crystal turrets can only be set up behind the city wall, but the turrets are fixed. The entire city wall is so long, how many turrets are needed to fully defend it? Rob¡¯s construct gave her a lot of inspiration. If there could be a magic crystal cannon that moved and aimed on its own, and could remain as small as the one used by the construct, the effect would be perfect. Audrey asked her constructors, and with Rob's skills, building such a self-propelled magic crystal cannon was not a problem at all. Audrey¡¯s suggestion made Rob¡¯s eyes light up. Indeed, among the constructs under his command now, the most powerful weapon is the magic crystal hand cannon. On the contrary, the construct itself has become insignificant, and its only function seems to be to carry the magic crystal hand cannon. If the magic crystal hand cannon is used as the main body, add moving legs and aiming eyes to it. Then the materials required for the entire structure will be reduced by at least two-thirds, and the workload will be reduced by more than half. And the body also has the most suitable reference, such as, thinking of this, Rob turned his attention to the six-legged Jirasha next to him. After discussing the details of the cooperation, Audrey said: "Part of the structures buried in the cave have been dug out. I wonder if you can repair them. If so, I will have them sent over. , after repairing it, how about one of us?" After several days of excavation, part of the goblin structure has been dug out of the ground. But when Audrey's constructor walked over, he was immediately dumbfounded. The structure of the goblin construct was relatively simple in Rob's eyes, but in the eyes of Audrey's constructors, it immediately became something more sophisticated than a clock. Let alone repair, they wouldn't even bother to disassemble it. If you dare to take action, you are afraid of damaging the energy circuit and causing an explosion. In desperation, Audrey had no choice but to come to Rob. It was better to repair half of it than to leave it broken and not use it at all. The craftsmanship and materials of the goblin constructs are relatively rough, and Rob doesn't like them very much, but repairing them is at least faster than rebuilding them, especially the magic crystal hand cannon, which is even more precise. ¡ In the next few days, thirty-six goblin constructs were shipped over one after another. After repairs, half of them were pulled back. But after pulling back, Audrey and others were dumbfounded again. The cockpit of the construct is made according to the size of a goblin, and no one can sit in it except for underage children He didn't realize that he had tricked Audrey. After repairing these constructs, Rob returned to Iron Jian Castle. The tools here were more complete and the environment was quieter, which allowed Rob to calm down and carefully inventory his own. reward. Of course, the harvest of magic crystals and various materials was not something to mention. He almost wiped out the decades of accumulation in Black Iron City. Even if he fully mobilized, he might not be able to spend it all by himself in ten years. Drop these supplies. In addition, there are some gains that he cannot measure the value of. The soul was transferred to the Cold Steel God of War, and Rob carefully sensed the body of the Cold Steel God of War. When his attention moved to the wrists of his hands, with a thought in his mind, the energy blade flicked out. This kind of weapon manifested by pure energy has extremely terrifying cutting power. Even a shield made of ferrous iron can be split in two. This non-gold, non-iron substance on the Cold Steel God of War creates a mark as soon as the energy blade is placed on it. However, the stronger the material is cut, the greater the energy loss. If you cut dozens of times on an ordinary steel plate, the energy loss is minimal. But if you cut a ferrous steel plate with one cut, one percent of the energy will disappear instantly. This is simply a waste of energy. Energy in exchange for destructive power. After testing the power of the energy blade, Rob turned his attention to the outer thighs of the machine. With a thought, the outside of Cold Steel God of War's thigh trembled, and two patterns lit up. It was a pattern in the shape of two shields, composed of complex, fine lines. After these two patterns light up, a shield composed of energy one after another emerges from the Cold Steel God of War's body, forming a pair of transparent light armor that tightly covers the surface of the body. It¡¯s actually an energy shield? Rob poked his chest with his finger in surprise. The energy shield on his finger and the energy shield on his chest contradicted each other, making it impossible for his finger to touch his chest. The energy shield floats ten centimeters away from the machine body. This is the first time Rob has seen this type of energy defense. The general energy shieldIt looks like a circle. This kind of energy shield is equivalent to putting a layer of energy-state armor on top of the outer armor. The shape of the defense also follows its body shape. This defensive shape will not increase the force-bearing area, making it easier to dodge enemy attacks. ??????????????????????? This kind of defensive shield is not one piece, but is placed piece by piece in various parts, and the shields of each component are not connected. This means that breaking a certain shield will not affect the defense of other places. This idea was so ingenious and valuable that Rob thought about it while checking it, and he became fascinated for a while. It took him a long time to come back to his senses. The defensive shield flashed a few times and the light disappeared. The shield has entered the most energy-saving stealth state, and will be triggered immediately as soon as it is attacked. Finally, Rob¡¯s attention moved to the chest of the machine. After triggering the aura of death on the battlefield, which greatly increased the strength of his soul, Rob sensed that there were five more parts in Cold Steel God of War's body that he could not feel before. Two places on the wrist, two places on the outside of the thigh, and the last place on the chest. He activated the two points on his wrist without much thought, thus activating the indestructible energy blade. Because he couldn't figure out what the function was for a while, and the battle situation had been reversed, he waited until now to be on the safe side before activating it. In the end, this part of the chest made him hesitate. It was the core of the Cold Steel God of War's soul. It was the most important position of the Cold Steel God of War. If there was any accident, the Cold Steel God of War would be destroyed. This consequence forced him to be cautious. But when he thought about the thirty-odd structures in his hands and the various materials piled up in Iron Jian Fort, Rob suddenly felt confident. Even without the Cold Steel God of War, it didn't seem to have much impact. Thinking of this, Rob put his mind on that point on his chest and moved slightly. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? There was a sound of inhalation coming from the chest of the Cold Steel God of War, and then a squeaking sound. The breastplate slowly opened, and a hollow space appeared.