The problem was that Al didn't find mercury in this world, so he had to turn to Sheldon for help, and Sheldon was indeed very knowledgeable, and he immediately found a suitable substance based on Al's description. Pen, fun, and www.biquge.info

An extremely viscous-looking, liquid-like substance with a glossy black color and a metallic sheen overall. Unlike mercury, it is singular in that it is neither sticky nor volatile. The substance of Hilton poured onto the table, tilting the table over, and the shiny black liquid rolled down at a rapid speed, but it did not leave a mark on the table, and it looked like it had a considerable weight.

"In the south, there is a very special kind of tree called the Iron Tree, which, as the name suggests, melts and absorbs metal. Their roots are buried deep in the ground and release extremely strong corrosive liquids that gradually corrode and absorb the metal beneath the soil. Therefore, this tree is considered to be the most dangerous pest, with only one tree surviving within a radius of several kilometers, and as long as there are iron-eating trees, the land will be completely polluted and no other plants can grow. The iron-eating tree is extremely harmful, and once it grows on a large scale, the large area of land will be completely wasted, and the damage is endless, and it is a tree that the kingdom prohibits planting. ", Hilton introduced to Al.

"This plant only blooms and bears fruit every ten years, and the sap in the fruit is this substance similar to metal, because its color is very similar to fine iron, and it grows in trees, so some scholars named it tree iron. ”

"The nature of tree iron is very special, it will quickly solidify at low temperatures, forming a solid metal, this metal is extremely strong, and has quite good ductility, can be used to make various weapons or utensils, is recognized as the best application of metal. At room temperature, the solidified iron will remain solid until it is at ultra-high temperatures, and will slowly return to its liquid form. It is precisely because of such excellent characteristics that despite the Kingdom's repeated orders not to allow planting, some places in the south are still desperate to secretly cultivate one or two plants, and the price of tree iron has always been high in the black market, especially the weapons made of tree iron, which are even more difficult to find. ”

After hearing this, Al said with great admiration, "Although it is rare, you don't have exactly what you have." He looked around at the various materials that Sheldon had moved out in order to improve Sheldon's array, and said with emotion: "How much effort does it take to collect these materials?" ”

Sheldon showed a look of pride on his face, his face was slightly stunned and seemed to remember something, and he said with a sigh: "In order to collect these materials, I have traveled south and north over the years, I don't know how many hardships and dangers I have experienced, and I have paid a huge price in exchange for these materials, it can be said that these materials are my lifeblood, and whoever dares to touch me will fight with whom!" , said that he seemed to think of something bad, and his face faintly revealed a murderous aura.

Speaking of this, Sheldon looked at Al and said in a tone of teaching juniors: "You are from a great noble, and you want to inherit the family's territory. But you have to remember one thing: if you want to go further on the road of magic, you can't do it by yourself in a closed house, and many of the materials needed for magic circles and experiments are not available to the rich and powerful, you must go to the place of origin to collect them yourself, at least the entire kingdom of St. Teresa must go through it if you can. After speaking, he hated iron and said fiercely: "Originally, this kind of truth should have been told to you by your teacher, but she is too unreliable." I think you're a bit talented in magic, and you might be able to walk some distances, even if not too far. He compared it with his fingers for a short time, and then said: "Let me tell you these truths, although the master leads the door and cultivates in the individual, but if these truths are realized by yourself, I really don't know how much time it will take, and how many bags will be hit on the door of your head." ”

Al laughed a little when he heard this, and he was very moved. The laughing thing is that this Mr. Sheldon is really unspeakable, very unfrank, obviously good intentions to do good things, but he prefers to make a high-minded, wicked and evil appearance. I was touched by Mr. Sheldon's selfless help, he did a little help to Mr. Sheldon, so in exchange for his "equivalent exchange", but from the beginning of the teaching of the Sheldon Circle, to the teaching in the process of developing electric lights, Mr. Sheldon can be said to have no concealment, pouring out his money, the knowledge he taught, the truth he told, has long exceeded the so-called "equivalence".

Al looked at Mr. Sheldon's serious expression and nodded solemnly, indicating that he took his words to heart. He looked at the tree iron on the table, remembering Mr. Sheldon's distressed expression just now, he couldn't help but hesitate a little: "These materials are all collected by you with great painstaking efforts, and now they are all consumed for experiments, or we can deduce them again, or do a few more alternative experiments, so as not to cause unnecessary waste." ”

Sheldon asked rhetorically, "Do you say that there is a corresponding theoretical basis for you to derive it again, and do a few alternative experiments, is there a corresponding alternative material?", leaving Al speechless.

Sheldon reprimanded: "Since it is the only way to come up with it, then even if there is only one in ten thousand hopes, you have to try, no one is born a genius to succeed, how can you get a successful result without experiencing a failed attempt." Magic is not something that can be mastered by some mind or pure talent, and if you don't work hard to push it, how can you open the door to truth. ”

"Timid, looking ahead, and worrying about the waste of materials, it's like chasing a girl, you don't want to spend money to dress up, why does that girl look up to you, and magic is not a girl, but a goddess, boy, don't underestimate magic. ”

Al was so trained by him that he couldn't lift his head, and muttered: "It's better to talk than to sing, chasing girls? Of course, I can only think about this in my heart, and I never dare to say it.

"Then if all the materials are wasted, won't the relevant research come to a standstill? Besides, just collecting these materials will waste your strength, and you have said that they are all your lifeblood, and a kid has all consumed them, do you have to collect them again?"

Sheldon asked curiously, "Why can't I collect them again?" and asked Al, "If I collect these materials only for the purpose of collecting, then what is the difference between me and the miser who died with a gold coin in his arms?" I collect materials to consume them, and if I need a material to study magic, no matter what time it is, no matter where it is, even if I have to cross thousands of rivers and mountains and go through a thousand hardships and dangers, I will also go. ”

"Because I want to study magic, I love to study magic. ”

Sheldon said, his face with a holy devotion similar to that of the fanatics, except that the fanatics gave their faith to the gods, while Sheldon entrusted his faith to magic.

Because he likes to study magic, that's all.

Al looked at Mr. Sheldon, even though he had taught him a lot of magic lessons from the past and the present, both Medea and Sheldon.

But just now, in the midst of those few words, Al felt that he had learned the most valuable lesson