In the laboratory, Rob will take off all his armor, because steel will block the magic elements and cannot use magic-related methods such as void seals. Rob, who had taken off his armor, stood in front of a pile of iron, frowning and looking at them in a daze. He previously purchased a batch of ferrous iron from the Dark Alchemy Association that was enough to make a God of War construct. However, during this time, part of the ferrous iron has been used, especially the bodies of Jirasha and Cabrit. They are all made of Yan Iron, so the amount of Yan Iron in his hand is no longer enough to build a God of War construct. The Dark Alchemy Association in Black Iron City can no longer go there because of No. 5 and the heavy armor. Teddy Ross can definitely trace it there with these two clues. If Rob appears there again, he will most likely be arrested. Others informed Teddy Ross. Where should I go to get another batch of ferrous iron? Seeing Rob in a daze, Cabrit couldn't stand it anymore. His current body was originally a dexterity-based construct. Originally, Rob was going to be placed in the laboratory as an assistant, but he never found one. An intelligent soul. Now that Cabrit's soul has been stuffed in, it can't be wasted. It can be thrown directly into the laboratory to serve as an assistant, and it is not an ordinary assistant. Cabrit's experience and knowledge in many aspects are enough to serve as an assistant. Rob's mentor, during this time, Rob learned a lot from him. "Is this something that needs to be worried about? Don't forget where this place is? Isn't Black Iron City a producer of iron? It directly digs out the raw ore and refines it. How much iron do you want?" Cabrit said . Rob was stunned for a moment, then turned to look at Cabrit: "Do you know how to refine ferrous iron?" Rob only knew that ferrous iron was extracted from steel. As for how to refine it, he didn't understand at all, so he didn't do it at all. Think about it. "You don't understand?" It was Cabrit's turn to be surprised. Rob's performance level was completely that of a senior constructor. Under normal circumstances, senior constructors also have the level of a senior alchemist. It is very possible that Or a very high level magician? A senior alchemist can't refine ferrous iron? How strange. Of course, most alchemists will not refine the ferrous iron themselves, which will only waste materials and energy. A cart of iron ore may only be able to refine one or two kilograms of ferrous iron, so it is more convenient to buy it directly. But Rob doesn¡¯t have such convenient conditions now, so refining it himself would be the best way. "How to refine it?" Rob did not answer Cabrit's question. If he understood, he wouldn't be troubled here. "Heat the steel until it melts, pour in the fire magic crystal ground into powder, and then activate it to instantly heat the steel to a temperature several times the melting point" Cabrit explained in detail the refining method of ferrous iron. Once again, it is indeed very simple. The only trouble is that it requires a lot of magic crystals. However, after calculating according to the proportion, Rob believes that it is still affordable for the time being, and now it only lacks a large amount of iron ore. Three six-legged constructs are in the vanguard, followed by a sapiens slave dragging a flatbed truck. One of the newly-made six-legged constructs is turning its head and looking around. The newly made six-legged construct does not have high intelligence and does not know how to look around at all. However, its soul was separated from Rob. Now Rob's thoughts are replacing the soul of this construct and controlling its body. That¡¯s all. Rob named his new clone No. 6, and the other new six-legged construct No. 7. The team walked forward along the cave. According to the memory of the rat slaves, there was an iron river bed exposed on the ground in the cave ahead. It used to be where the underground river flowed. Over the years, the iron ore was washed out of the surface. Now the underground river has changed its course. , the river bed composed entirely of iron ore is exposed. The iron ore there does not need to be dug, just pick it up casually. No. 7 carries a small magic crystal furnace on his back. Rob only needs steel, not iron ore. The workload of transporting a large amount of iron ore back to the laboratory is too great. So Rob decided to smelt the ore on the spot and bring back only the iron. The magic crystal furnace is used to smelt ore. Although it requires the consumption of magic crystals, it is much more convenient than the ordinary open flame furnace. Basically, if the iron ore is poured in from one end, the molten iron will flow out from the other end, and the rest will The slag sinks directly to the bottom. Despite its small size, this magic crystal furnace can produce more than two hundred tons of steel a day as long as there are enough magic crystals. With the development of human magic system, it has been integrated into all aspects of human life and production, and the magic crystal furnace is only one of its application directions. Walking in the empty cave, the sound of running water in the distance kept coming. It was the sound of underground rivers flowing. Faintly, a warm breath came from the darkness ahead. Rob¡¯s soul moved and he stopped first. With the previous experience of controlling No. 5, Rob deliberately strengthened its perception ability when making No. 6, and at the same time selected the most powerful soul fire for it. This soul fire was separated by Rob and put into the soul crystal to breed for more than a month. During this month, Rob put almost all the soul energy into this soul, so that this soul The intensity increased sharply, all the way to the sixth level of soul fire intensity. In this way, when Rob replaces the soul with his own thoughts, the powerful soul also allows him to use some soul-level perception abilities. In the darkness ahead, there was some warm breath. In Rob's soul induction, it was like the warm and hot breath exhaled by someone breathing beside him. There are creatures, and they are creatures with a very powerful breath of life. Rob has only sensed this powerful life breath from one creature, which was the green dragon that No. 5 encountered in the giant forest. At this moment, although the aura of the creature in the darkness ahead is not as strong as that of the green dragon, it is definitely a very huge creature. What is it? Before Rob could figure out what it was, a swishing sound came from far away and quickly approached. It was the sound of something sliding across the ground. It sounded very uncomfortable. The sound alone gives people a slippery feeling. The Intelligent Rat slaves following the three constructs looked at each other in disbelief, and their collective expressions changed. They seemed to recognize that the sound belonged to some creature. They screamed and hugged each other tremblingly. . The tax official's attendant, who was temporarily reduced to a translator, said in a trembling voice: "Yesyes, yesit's the earth demon"