"I knew that the Superhallows weren't that easy to use. Xiao Chen said. "If the situation of the Seven Towers is similar to that of the Spirit Tower, how many crystals will it cost!"

"Although I don't know the status of the other six towers now, the essence of our seven towers is the same, and if you can find them, they should all be in this state. Back then, we calculated that the cost of a real battle in the Seven Holy Towers would be about 100 tons of spars. ”

"A hundred tons?" Xiao Chen gasped, "This kind of consumption is worth the output of several large crystal mines under the name of the Tower of China in a year." I don't know how many machines can be operated and how many guns can be equipped. ”

"After all, it is to banish a god to another dimension, and of course the cost is huge. During these two years, you will need to accumulate a large number of magic crystals. Ta Ling said.

"Now I kind of regret that the ground I fought was not big enough. Xiao Chen covered his forehead and said.

Next, they went to the general library at the top. The library has two floors, one for general books and the other for professional books on magic. The books were all placed in different categories in the magic protection shelves, Xiao Chen and the others took a general look and found that there were many magic books here that could supplement the magic collection of the Hewan New Town Great Library.

Xiao Chen found a small independent bookshelf with a sign that read Earth Books. There are quite a few books on the shelves, more than 200 of them.

"This is something that I have summarized and organized based on my memories before the time travel, and it has played a very important role in the development of the Spirit Tower. Taling said.

"How can you remember so many books you read in the past?" Xiao Chen asked.

"You should know that there are a lot of memories in the brain, but because of forgetting, we lose the means to access them. There is a Holy Order spell in the Spirit Tower called Soul Inquiry, which can find the memories of all the existences in your life and fix them. It was only after I used this magic on myself that I remembered so many books. Of course, the price I paid was not small. Ta Ling said.

"This spell doesn't seem to be as rosy as it seems. Xiao Chen said.

"Not bad. In fact, this spell is also a forbidden spell in the Spirit Tower, and only those who have been evaluated by the two Sages are qualified to use this spell on themselves or others, as long as one of the Sages deems it inappropriate, they cannot perform this spell. But even so, this spell is still very dangerous. Because remembering and remembering the memories of a past life in a short period of time is very stressful for the soul, in this case, if there are any unbearable memories in the soul of the caster, it will cause him more serious damage. Some people have a great change in personality and even mental illness because of this magic. Even if it was me, after using this magic on myself, it took me more than a month to calm down because I missed the past world too much. ”

Xiao Chen can understand what He Jin said, when they come to this world, there is no one who does not miss every bit of the past world. If the voices and smiles of relatives and lovers in the past world and the memories of getting along suddenly come to mind, it must be a very sad thing. If the person had suffered a great misfortune, it would have been very painful to re-experience it.

Soul Exploration seemed to be a very dangerous magic, but Xiao Chen was very interested in it, "Ta Ling, do you remember this magic?"

"This Holy Order magic is recorded in the Inheritance Chamber, and you can learn it if you have the right qualifications. Still, I want to warn you how dangerous it is. ”

Xiao Chen nodded, stretched out his hand to the bookshelf, and the magic protection light curtain on the bookshelf naturally retreated to both sides. He picked up a book and saw that it was a compendium of psychology, and glanced at the table of contents, which was similar to the psychology books he saw on Earth. It's just that a chapter has been added at the end: the guiding significance of psychology to soul magic.

"A lot of psychology books. ”

"Before the crossing, I was a teaching assistant majoring in psychology. ”

"Huaxia University?" Xiao Chen asked.

"How do you know?"

Xiao Chen said: "I still know a lot of things, according to the time you traveled, you should be active in the eastern part of the campus, right?"

"Yes. What the hell is going on?"

Xiao Chen said: "Don't worry, I'll tell you slowly in the future." ”

When Xiao Chen and his party came out of the library, Mao Kai had already sandwiched the two books in his hands, "It's a little interesting, take it back and take a look at it first, it seems to be a little helpful to a magic model problem that I was thinking about before." ”

After that, they visited several laboratories, and one of the features of the Spiritual Tower's laboratory was that there were two common devices in the laboratory, one was a transparent glass room. Taling told them that it was a device designed to bind souls, called the Soul Chamber. After any soul is thrown here, it can manifest its own form, and the data of various mental fluctuations will be measured and displayed on the light screen on the side, and the mages of the Spirit Tower will use this device to test the soul magic.

The other device resembles a transparent coffin with various braces and shackles to hold the limbs and head in place. Obviously, this set of things is used against living people, and according to Taling, some magic experiments must be performed on living people, and this is their test bed.

Seeing these Xiao Chen and the others, they felt a little chill in their hearts, and they didn't know how many people had shouted and cried here to achieve the current achievement. The mages of the Seven Towers were definitely not messengers of justice, and they were often unscrupulous when it came to fighting the gods of nature.

Each lab has a dedicated bookshelf with a number of lab reports in chronological order. The Spirit Tower's experiments on souls are very detailed, and many of them are specific to the effects of a certain type of magic on a specific group of people, or the effects of different auxiliary materials on the same magic.

When he came out of the laboratory, Mao Kai had two more experimental reports in his hand, "I have to say that the era of the Seven Towers with the participation of time-travelers and the current era dominated by empires and kingdoms are not the same thing at all. It was an era of civilization that was much more developed than it is now. If you look at these reports, whether it's logic, style, or even writing norms, they are the standard of our time. In the current laboratory of Hewan New Town, it is not abrupt at all. As far as I can say, the things we find in libraries and laboratories are even more valuable than the Spirit Tower itself. They can significantly reduce our development time in many areas. I suggest that all these materials be shipped out, and immediately connected with the school through the teleportation array, and all these materials can be transported back and put into use immediately. I am sure that soon we will be able to achieve breakthroughs in many areas. ”