(The Mid-Autumn Festival has a new chapter, wishing everyone good health and happiness.) Muhahahaha, before I knew it, it was already 100,000 words, I was so good. ）

He had just returned to his hut, and before he had yet to eat, the door had been pushed open, and Montoya had come in.

"Hi Leo. ”

Leo hurriedly greeted him, "Good afternoon, Master Montoya." ”

"It's okay, it's okay. Montoya laughed, took out a small bag from his arms, and handed it to Leo, "This is a magic crystal worth 100 gold coins, I have exchanged it for you." ”

"Thank you, thank you. Leo took the bag and weighed it slightly, there should only be three small pieces of the worst-quality magic crystal. He couldn't help but sigh, "Magic is really a rich man's game, those utensils and tools, each of them is worth a lot of money, and these three small pieces of magic crystals can be worth my salary for more than ten years." ”

As he was muttering to himself, Montoya showed a hint of shame and asked, "Leo, I didn't understand the lesson taught by the teacher today, how much have you learned?"

Leo came back to his senses and replied, "I've pretty much learned everything." ”

Montoya immediately became excited, "Great! Can you tell me about it?"

Leo didn't care about lecturing, but he didn't have much time, so he hesitated: "Master Montoya, I still have work in the afternoon......

Montoya waved his hand, "Of course I won't take up your working time, just tell me about it at noon every day." I won't let you talk about it in vain. What you need, just tell me. ”

Seeing the young man's serious face, Leo felt even better about him. At least Montoya is not the kind of "I want to get what I want!" and knows that if you want it, you have to pay first.

However, Leo really didn't need anything now, so he said, "Master Montoya, don't use it. ”

"How's that going to work? Tell me what you need, or I'll give you money. Montoya was about to untie her pockets.

"I really don't need to, I don't have anywhere to spend the money if I want it. Leo had an idea. Before, whether it was in the library room or the real yàn room, except for the 8 level 0 magic spells in the guide, he didn't find any spell books, so he asked, "What is the name of the magic that Master Owen and Miss Claire cast just now?"

"It's the Forbidden Light Technique. Montoya stopped what he was doing, "Ah, by the way, aren't you a servant, why did you suddenly become a student of the teacher again?"

Leo also wanted to find an opportunity to reveal his situation, so he explained: "Young master, you also know that the master allowed me to read books, and I found a meditation guide in the library, and I learned it by following it. Later, the master thought that I still had some talent for magic, so he asked me to learn it with me. ”

"I see, I didn't misunderstand you, hahaha!" Montoya was not jealous at all, but applauded and cheered.

Leo really didn't understand why he was so happy. However, this kind of thing is not easy to ask, so he said tentatively: "Young master, can you teach me that forbidden light technique?" ”

"I ...... I haven't learned it thoroughly. Montoya blushed a little, "But I have spell blueprints, you wait, I'll go get it for you." After saying that, he ran away.

"Can you become a mage with this character?" Leo laughed dumbly.

In a few moments, Montoya had returned, still holding a stack of parchment in his hand.

"Here are the change-based forbidden light techniques, the sculpting energy type tremor electric shock, and the enchantment-type short-term sharpness, all for you. ”

"Give it to me?" Leo stared at the parchment, a little incredulous. These three level 0 magic spells are not in the guide, but listening to the name, it should be quite good.

"Of course it's given to you" Montoya saw that Leo didn't dare to accept it, and said with a smile: "These spell drawings are the most common, and they are not very valuable, so you can take them." ”

Leo then understood. Thinking about it, for a noble child like Montoya, a hundred gold coins is not taken seriously, and the blueprint of the last low-level 0-level magic is really nothing. However, for him, these drawings were very important, so he quickly took them and carefully stored them in the drawer.

"Shall we get started?" asked Montoya, looking forward to it.

"Yes. Leo got the drawings and was very happy, so he quickly took out his notes and explained the two-dimensional coordinate system to Montoya.

As the lesson progressed, Leo found that Montoya was still quite smart, but his attention was too inattentive, and he didn't know where his mind drifted for more than ten minutes every time he spoke.

However, after so many years of studying, Leo naturally has a way to keep him focused, and that is to keep adding some interesting little jokes to the lesson.

"Master, do you know how the coordinate system was invented?" asked Leo.

Montoya was curious: "I don't know, do you know how it was invented?"

Leo smiled and said, "There's such a story. One day, a scholar was sick and bedridden, but his mind had not rested, and he was thinking about a question repeatedly: Geometry is intuitive, while algebraic equations are more abstract, can we use geometric figures to represent equations? Here, the key is how to link the 'points' that make up the geometric figures with each set of 'numbers' that satisfy the equations. He pondered it desperately. What kind of way to connect 'point' and 'number'? Suddenly, he saw a spider in the corner of the roof, pulling the silk and hanging down, and after a while, the spider climbed up the silk again, and drew the silk left and right on the top, forming a right angle. ”

Montoya was surprised, "Ah, spiders, could he use the coordinate system that spider webs invented?"

Leo nodded, "Yes, the spider's performance has made this scholar's train of thought suddenly clear. He thought that the initial position of the spider Russ should be the origin, with the first filament as the horizontal axis and the second filament as the vertical axis, so that any position on the web could be represented by numbers. So under the inspiration of the spider, the mage finally invented the Cartesian coordinate system. ”

Montoya said thoughtfully: "Well, I remember reading a book and saying that many inventions and discoveries since ancient times have been made from small places. ”

"Young Master Montoya is very perceptive. Leo complimented, and seeing that the other party's attention had been completely absorbed, he began to continue the lecture.

Just an hour later, when the last part of the note was finished, Montoya was still immersed in the lesson.

Leo didn't interrupt, and quietly let himself reminisce.

After a while, Montoya suddenly said in surprise: "Leo, you are really amazing, better than what the teacher said, I understand everything!"

"Young master, I don't dare to accept this kind of words. Leo said sternly.

Montoya also realized his gaffe, scratched his head, and whispered, "But you said it really well." ”

Leo smiled and said, "The young master can learn to understand, the main thing is that the young master is smart." I think it's best not to let anyone know about the two of us. ”

If the old mage knew that he was teaching Montoya in secret, it might cause the other party's displeasure, but the current situation is very good, and Leo doesn't want any changes.

Montoya still thought he was referring to Owen, and smiled and said, "Well, you're right, you can't let others know." ”

After the lesson was finished, Leo estimated the time and said, "Young Master Montoya, let's get here today, I should go to the real yàn room, and the afternoon's work will start soon." ”

Montoya was a little disappointed, he had never been so interested in learning as he was now. But after all, the work in the real yàn room was important, so he had to nod, "Oh, then you go first, I'll come back to you when I'm free." ”

Back in the room, the old mage was already there, flipping through a thick notebook. Sensing Leo coming in, he beckoned, "Leo, how long can you keep your memory ability?"

Leo didn't know what he meant, but replied, "This...... I haven't tried it specifically, but I don't usually forget what I remember before. ”

"Very well, you write down this book first. The old mage showed a hint of joy and handed the notebook in his hand to Leo.