Guderian walked several floors in the mage's tower before finding the study of Fortan Julis. However...... Most of the books were written in the Drow script (elven script), and Guderian could not read anything. Only some of Fortanulis' personal experimental notes were in human script, but very few of them Guderian could understand. In order to avoid being embarrassed by Natasha's private contact, Guderian barely flipped through the few experimental notes of Fortan Ullis to pass the time. Flipping through the pages, suddenly a text caught his attention: ...... As an intelligent being, the initial state of the soul is chaotic and ignorant, like a blank sheet of paper. As the carrier of the soul, our body plays the role of a filter and a pen tip - from the beginning of life, the information received by our body in the process of growth is fed back to the soul, leaving different imprints and growing from shallow to deep as the body grows. After these superficial and deep imprints accumulate and stabilize the outward manifestation of the character, our soul can be regarded as a sound and mature soul. So, can the soul be divided, and can the missing parts after the division be artificially repaired?......

Guderian had been practicing meditation since he received the meditation method from Gandalf, and now the use of the team's blood control had entered the threshold of subtlety. Guderian still remembers that when he discussed with Gandalf at that time, he proposed that he might be able to understand the causes and methods of mental passivation by starting from the attributes of the soul. It was only the haste of the war that interrupted Guderian's idea of following Gandalf to continue his studies. Now, when I see the relevant knowledge here in Fortan Julis, I can't help but be overjoyed. Who was Fortan Julis? Ever since he encountered him in the great battle of Asgar Plain, Guderian has deliberately learned about his life and deeds. As the archmage who had the best hope of stepping out of the end of spells more than a hundred years ago, his reserve of knowledge was naturally profound, even if he was not an archmage of the necromantic system at the beginning. But after he was transformed into a lich, who would dare to say that he could be more authoritative in the study of the soul or the body? Gandalf couldn't either, it didn't matter how strong or weak he was.

Guderian had forgotten hunger and fatigue, Natasha and Fortan Julis, and was in an underground world at a depth of many meters, and he was fascinated by the notebook...... What is the medium of the soul, and why can a spell model constructed with spiritual power imprint on the soul to form a so-called spell bit?......

...... After endless research and experimentation, I think it should be defined as follows: the soul, the medium, is a collection of mental power and consciousness, and depends on the existence of the brain as an organ. So, how did an undead creature like a lich exist without the death of the brain, and how did it use its soul to create a so-called life box, and then reshape and resurrect after the body was destroyed?...... Once I've solved these mysteries, I may be able to take the final step to break through the shackles that limit the growth of mages at the end of the spell......

These notes are all research conducted by Fortan Ullis before he was transformed into a lich, and they contain a large number of questions and verifications and breakthroughs in his soul research. This basic and detailed knowledge was like lightning in Guderian's mind, blasting through the fog, allowing Guderian to recognize the source of the soul and the basis of growth.

The reason and method of the passivation of mental power, which Gandalf had been puzzled before, had already loomed in Fortan Ullis's notes like a light in a gap, but Guderian was not a professional in magic. Guderian believed that if these notes were shown to Gandalf, in the near future, the active learning method of blood control would no longer be a fantasy and a luxury.

Before he knew it, Guderian didn't know how long he had been immersed in his notes. It wasn't until Natasha woke him up that he realized that the food that Fortan Ulis had retrieved was already cold on the desk where he was reading his notes—the temperature in the underground world was not high, on the contrary, it was somewhat cold, and if compared with the seasons on the ground, it was somewhat similar to the autumn and winter in the southern part of the continent. One can imagine how long Guderian had been sitting in front of this food.

"What about the masters?"

Guderian put down his note after Natasha woke up, looked at the food in front of him, turned his head to look around, and asked.

"The Master has been summoned to discuss something. Natasha said.

"Oh, it looks like we'll not be out of the underworld for long. Guderian said.

“...... How to say. Natasha asked, surprised. She didn't even think about it herself.

"According to the master, the master has not won the trust of the drow in the past hundred years. Then those who can be called to discuss things must be related to the task that the master is going to take. Guderian said.

"Maybe...... Actually, that's pretty good. Natasha's mind didn't know where to turn, said. Guderian looked at Natasha with a puzzled expression.

Natasha ignored him, casually used a small fireball to help Guderian heat up the food, and walked away. Guderian picked up the food and looked at Natasha's disappearing figure at the top of the stairs and muttered to himself, "I really knew her before?"

In the castle's chamber. Three Drow mages and four minotaurs sat opposite each other at the long conference table, including the Lich Fortan Ulys.

"Under His Majesty's planning, the territory of the ground has been consolidated. Now, except for the three passages from the ground to the underground in the Inca on the ground, all the human forces have been dragged by demons and then blown up and blocked. In the future, our focus will be on the consolidation area. Now His Majesty has ordered that for a month or so, all the other forces left underground will be transferred to the Inca territory on the ground, except for the troops that are enough to deter the creatures of the abyss and the guards who guard the cities. A minotaur at the conference table said in the lingua franca of the underground.

"Now, listen to me assign tasks. The minotaur glanced around and continued, "Fortan Ulis and I stayed in Pearl City. The others went to the free-range kobold tribe to gather kobolds, and the other gathered drows, minotaurs, dwarf mages and craftsmen, and Medusa warriors. Depart within a week. As for the specific distribution, you can choose for yourself. With that, the Minotaurs threw a list of tasks to each of the Drow mages and the Minotaurs for them to sign at their choosing.

After that, everyone in the conference hall filled out their forms and signed them in a few discussions, and then handed them to the Minotaur and the meeting dispersed.

By the time Fortan Julius returned to the Mage's Tower, Guderian had already eaten food and continued to study the notes. Natasha found a room on her own to meditate and recover.

Seeing the return of Fortan Julius, Guderian hurriedly asked him for something he couldn't understand. Although he was a little surprised by Guderian's studiousness, he did not refuse.

After explaining Guderian's questions, Fortan Ullis said: "These studies are the main culprit of my split personality, and they also directly caused my current situation. I wanted to destroy it before, but I couldn't bear it. ”

"Master, on the basis of your research, Lord Gandalf has a great hope of mastering the active learning and activation methods of blood control. Please allow me to take these notes with me then, Master. Guderian pleaded.

"Blood control? huh...... I used to think about this too, but then I split my personality and transformed into a lich, and it was gone. Fortan Ulis said. "As for taking these notes, of course you can. Gandalf, the boy, had heard of it before I was converted, and if these notes could help his research, I would have made up for some of my past sins. Fortan Ullis fell into the memory.

"By the way, the Master was summoned to be assigned a mission back to the surface?" asked Guderian. Of course, Guderian wanted to get back to the surface as soon as possible, knowing that humans are very passive in the current situation. In addition, he and Natasha are unknown to the kingdom on the surface, which will hit the dragon guard that has just been formed.

"Yes and no. Fortan Ulis came back to his senses and said helplessly: "I was arranged to stay and guard Pearl City. Sending you back to the surface will have to be delayed. Then, Fortan Ulis told Guderian about the military strength of the underworld, the recent developments, and the missions.

"......" Guderian couldn't help but be a little anxious, if he had been stranded in the underground world, the 20,000 recruits didn't know if they could withstand a battle under the teaching of Achilles and others. At the same time, his life and death are unknown, which will make his father worried.

"There's no need to rush. There will be a chance. Fortan Julius said, "Stay here in peace, and I will also take advantage of this time to use Natasha's power to see if I can kill another personality." ”

Natasha didn't know when, but she also came to the study, just in time to hear Fortan Ullis say that she needed help.

"How can I help, Master. Natasha sat down across from Guderian. The lich walked to the ledge and pondered.

After a while, the lich turned around and said, "I'll act when I have a concrete plan." I'll explain it to you when the time comes. Before I do that, I'm going to mend my soul now. Progress should be made within a week. ”

"Good master. Natasha said.

"I have some research on the twelve and thirteen rings of spells here, Natasha, you can take a look. The lich said, pointing to the notes that Guderian had sorted out and had thrown on his desk.

"Good master. Natasha looked noncommittal. In Natasha's opinion, Fortan Ullis's research has fallen behind. In the past hundred years, the outstanding mages of mankind have already done a lot of experiments and studies on the stage before the end of the spell, and it is believed that their research is more accurate and worth learning than that of Photanulys alone. Still, Natasha put away the notes that the lich had recommended.

(Counted as the 13th supplement)