For this arena machine spirit, Lei Dong still feels quite satisfied, not only has a wide range of knowledge, but also has a good spiritual intelligence, and can also research and develop certain things. For example, the Thunderbolt's ghost soldier system is handed over to the machine spirit for continuous research and development, trying to make its strength go further. Since the special ghost soldiers were created by Lei Dong, they have made many meritorious contributions, adding a lot of combat power to Lei Dong. If you want to survive in this dangerous world and live well, the only way to do this is to constantly improve your strength and let your strength stand at the peak of this world. Otherwise, a powerful enemy will never have to reason with your mouth.

The materials of the ghost soldiers can be said to be endless, as long as there is life, you can find hún spirit resources to refine. This shows that this is a sustainable development path.

"Alright, I've made a list of materials for repairing the Athletic Tower, you can see for yourself. "The spirit of the instrument was bō for a while, and the material was transmitted to the thunder through the divine thought.

Rao is Lei Dong's incomparably rich net worth, and when he first saw this material, his eyes began to turn a little green. This is an extremely terrifying list of materials, and each of the materials listed on it is extremely expensive and rare. A large part of it is material that Lei Yan has never heard of, and may have long since been exhausted in the long river of history.

"I said machine spirit senior, is this material a bit exaggerated?" Lei Dong shook his head with a wry smile and said: "With my net worth, at most, I can get one-twelfth of tenths, and two-thirds of tenths are not the rarest materials in the world today, I only hear its name, but I don't know it." The rest of the things, the younger generation has never even heard of the name. "Cultivation is a process of self-life evolution, which can not only greatly improve the physique and prolong the life expectancy, but also the intelligence has been sublimated again and again in the transformation of life again and again. The specific performance lies in memory. With the current level of life of Lei Dong, although it may not be able to reach the level of memorization, at least anything can be remembered once it is seen*. From this to remember, it is amazingly efficient and exaggerated.

It is also because of this that the monks of many major sects, when their cultivation level is low, will concentrate on cultivation. It wasn't until I was fortunate enough to cultivate to the Jindan stage, or the Yuan Infant stage, that I would be willing to start studying some miscellaneous techniques. First, life is too short, and it is too late to cultivate, so how can it be too much of a waste of time? Second, it is because when you cultivate to a high level, your intelligence will be greatly improved, and you will learn things faster. Of course, the most important reason is that the monks of a sect can cultivate to the Jindan stage, which is already less than one in a hundred, and those who can cultivate to the Yuan Infant stage can only produce at least one in tens of thousands. This is still a sect with resources, and for some small sects, it has not been able to produce a single Yuanying monk for thousands of years.

Therefore, unless you feel that pure cultivation has no future at all, it is absolutely impossible to waste time on certain techniques.

"Lack of resources, lack of resources. The machine spirit sighed and said, "How did this world become like this now? In my master's time, a monk or demon beast at the Yuan Infant level, although it was not an overwhelming existence, could only be regarded as the cornerstone existence of a sect. Where is it like now, one by one it is the same as 2580,000. The materials I have listed were common in my master's time, and they were thrown away as they were used. ”

"Maybe it's because of your seniors' extremely wasteful attitude towards natural resources and unscrupulous consumption that we juniors have to face a world of scarce resources later, are you embarrassed to mention it?"

"Well, don't talk about that. The machine spirit seemed a little embarrassed, and re-listed a list for Lei Dong: "This is a minimum material that I have drawn up based on the current situation of the world, and it is already the worst material, and it can't be reduced." After Lei Dong sensed the list with his divine mind again, he breathed a sigh of relief and said: "The list of seniors, the juniors have already remembered it, and within a hundred years, the juniors will definitely get all the materials and start repairing the Athletic Tower." "This material is obviously much better than the previous one. Although there are still many precious and hard-to-find things, most of them can still be obtained as long as they are willing to huā spirit stones. There are only a few, so I'm afraid it's more difficult to get by. However, repairing the arena is not in a hurry, and it is completely possible to get the materials together slowly.

The machine spirit seemed to be a little satisfied with Lei Dong's promise, and his mood eased a lot: "It's not in a hurry, but you have to find some free time to learn the art of refining weapons with me, otherwise even if you have all the materials, you won't be able to refine the Athletic Tower again." ”

"In this way, it will be troublesome to the seniors. Lei Dong spoke, especially politely. In fact, Lei Dong himself is also very interested in the alchemy of the machine spirit. After all, the machine spirit comes from a certain super power in ancient times, and it can refine the power of the arena, how can the art of refining weapons be underestimated? Many techniques are probably already lost now, and there is nowhere to learn them if they want to.

"Your ghost soldier technique, although not mature, can be regarded as quite whimsical. The machine spirit gave a rare praise: "I have helped you re-study it for a while, and in terms of local power, it can go even further." ”

"The seniors, the younger generations have an immature idea, I don't know if it can be realized. Lei Dong thought for a moment and said: "A single ghost soldier, even if its ability is exerted to the extreme, there is a limit. The idea of the younger generation is that it is better to combine the ghost soldiers one by one to form a unique combat weapon. ”

"Oh? After a slight groan, the machine spirit seemed to be a little interested and said.

"In fact, as we all know, whether we humans or species, are essentially multifactorial life forms. Lei Dong thought for a moment, and made his language fit the world: "Our body is composed of countless life factors with different functions, and any single life factor is very fragile, but when combined into one, it will exert powerful abilities. The ghost soldiers, on the other hand, are refined from all kinds of yīnhún, which are a special combination of hún body and netherworld ghost energy, and are extremely strong through formations. Can we refine each yīnhún into different parts and combine them into powerful weapons? For example, ...... like this"

When Lei Dong used his divine thoughts to communicate, he directly drew a simple drawing and explanation in his mind, and passed them on to the machine spirit with his divine thoughts. This method of communication is similar to the way of telepathic transmission, which is extremely convenient and intuitive, far more than pure verbal communication. The design given by Lei Dong is like this, on the surface it looks like a pot-bellied cannon ghost, but in fact it is made of two yīnhúns. One yīnhún was refined into the shape of a cannon barrel, while the other was completely formed into a large belly. The two are then connected together in a combined way. In this way, the big-bellied cannon ghost formed can far surpass a single one.

After being silent for a while, the machine spirit seemed to be a little emotional: "The boy surnamed Lei, you are the person with the most creative thinking I have ever seen in my long life. If you can persist in learning the refining weapon, you will not be able to achieve anything in the future, and you will be above my master. "In fact, in the previous ghost soldier refining, Lei Dong had already given him a great surprise, otherwise, it would be impossible for the machine spirit to stand on Lei Dong's side when people were in a fair decisive battle.

Ray shook his head and laughed, he knew his own business. It's not that he really has a strong mind, but that he combines the insights and experiences of the two worlds. Although he lived too short in his previous life, he only lived for more than 20 years. But those knowledge systems in the previous life and the world are completely different models. When the two are combined, they can burst out some good wisdom fire. ..., refining two yīnhúns into different parts to form a pot-bellied cannon ghost is just one way for Lei Dong to show off his design philosophy. In fact, his idea was even more peculiar, as long as he was willing to design the formation, which was equivalent to making a mold, there was a way to refine yīnhún into various parts, and then combine these parts into a giant Mac.

Even a flying boat can be refined by a huge number of yīnhúns, with patience and skill.

Perhaps it was because of the thunderous jī that he was enthusiastic about his creation, and the spirit began to prepare to experiment with the pot-bellied cannon ghost with great interest. However, Lei Dong stopped him for the time being, and began to instill some "advanced" concepts in him. Soon, after several hours of huā's first design, the duo's first design came out.

It was something that the spirit had never seen before, a slender tube made from one yīnhún, and several yīnhúns made into various strange shapes, and finally spliced together, some resembled a cannon ghost many times smaller, and some resembled a magic weapon, but the shape was so strange.

The machine spirit didn't know, but Lei Dong knew very well what this thing was, it was something that men liked very much in his previous life, a gun, to be precise, like an assault rifle, and his long and narrow body was full of murderous aura. After Lei Dong came to this world, he also used his brain to think about whether to make a gun to play. But thinking that the magic weapon in this world is too powerful, the advantage of the gun is not obvious, and it also requires a lot of refining knowledge to make it. It is also because of this that this idea has been suppressed. Now that I have started to learn the refining technique, all kinds of wonderful thoughts that have been suppressed for a long time can't help but come out of my mind one by one.

This gun, made from a total of seven yīnhúns, has a simple structure, but it should not be too powerful. The thunderous divine thought extended out of the flying boat, and after more than ten miles away, he found a Jindan-level Netherworld Demon Beast.

......！。