Time flies by, and it’s already Saturday in a blink of an eye.

After the luncheon, Lin En arrived at the Defense Against the Dark Arts professor's office as scheduled. He held a copy of "A Simple Introduction to Ancient Runes" in his left hand, and gently knocked on the office door with his right hand.

"Quite on time, come in!"

Professor Green opened the office door and let Lin in.

Linn walked into the Defense Against the Dark Arts professor's office and looked around curiously.

I saw that the Defense Against the Dark Arts professor's office was divided into three areas under the arrangement of Professor Green. The outermost area was a desk sandwiched between two bookshelves. This seemed to be the place where Professor Green corrected students' homework and prepared lesson plans.<

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Walking further inside, there are dozens of cages covered with red cloth stacked on top of each other. Linn guessed that these are the teaching materials prepared by Professor Green, just like those acromantic spider larvae on Monday, and

These textbooks were most likely captured by Professor Green from the Forbidden Forest.

As for the innermost part of the office, there were a large number of alchemy equipment, with countless metallic lusters flashing. Linn also saw a prism-shaped equipment, with a set of flashing red lines that were continuously spraying flames upwards.

"Have you memorized the "A Simple Introduction to Ancient Magic Texts" I asked you to recite on Monday?"

Professor Green closed the office door, waved his wand and used transfiguration to conjure a chair, and motioned for Lynn to sit down.

Lin En sat down obediently, nodded and said: "I remember everything."

So Professor Green opened his mouth and asked a few ancient rune words contained in "A Simple Introduction to Ancient Magic Texts", and Lin En also answered fluently.

"Very good, take this."

Professor Green nodded with satisfaction and handed the two notes to Linn.

Linn looked down and saw that one of the slips of paper was densely written with the name of the book, while the other slip of paper was signed by a lone Professor Green.

"These are the books related to alchemy that you need to study on your own next. You can just read them in order. As for the last few books, they are only available in the restricted book section of the library. You can borrow them with the signature slip I gave you.

."

Professor Green said calmly, a glimmer of light flashed in his light blue eyes. He didn't seem to worry that Linn would use his signature slip to do anything else.

"Okay, Professor Green!" Linn put the note away.

Professor Green turned around, crossed the desk and walked towards the deepest part of the office. He stood in front of the prism-shaped alchemy equipment that Lynn had seen before. He turned around and said, "Come here, Lynn."

Linn raised his feet and came to Professor Green.

In front of the two of them, this group of red lines was still releasing flames. The flames brought a hot breath, but unexpectedly made Lin En feel a little comfortable.

"You think that these endless flames are generated by this set of runes, right?"

Professor Green pointed at this set of runes and asked.

Linn thought for a while, nodded and said, "Yes, Professor."

There is nothing else on this device except this set of runes. Linn really believes that the flame is produced by this set of runes. Moreover, Linn also feels the breath of magic from these runes.

Hearing this, Professor Green smiled and shook his head. He pulled out his wand and pointed gently at the device. The bottom of the prism suddenly cracked, revealing a glowing fluorescent crystal inside.
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This crystal keeps blooming with light, and bursts of magical power spread from it.

Obviously, this crystal is the real energy source of the flame.

"This is a product that I imitated my teacher's magic stone. However, it does not have the power of turning stone into gold or immortality like the magic stone. It can only store our magic power and release it when we need it.

." Professor Green explained, "But, after this incident, what did you understand?"

Lin En tentatively replied: "Nothing is created out of thin air. If you want to get something, you must pay a price of equal value?"

Professor Green nodded with satisfaction: "Yes, remember, the most basic rule of alchemy is 'equivalent exchange'. If you want to get something, you must pay something of equal value. This is what every alchemist must do in the alchemy process.

It is a principle that must be followed. If you have read books related to alchemy, you should also know this basic rule."

"Alchemy is different from idealistic magic. It is not the other side that you can reach with a wave of a magic wand. It is true that it cannot let us get what we want easily, but its value is even greater. It can let you have

Eternal!"

The gloomy look in Professor Green's eyes was replaced by a lofty, faith-filled light, and his words were full of convincing power.

"In addition, there are two taboos in alchemy that you must remember." Professor Green's expression suddenly became serious.

Lin En guessed: "Time, and soul?"

Hearing this, Professor Green shook his head and said: "That is a taboo on magic. There are only two taboos on alchemy. One is that it can never cross the realm of God, and the other is that alchemy on the human body is prohibited."

Lin En nodded thoughtfully.

Since the original work repeatedly emphasized the dangers of playing with time and soul in many aspects, including the time turner and Voldemort's Horcrux fragments, Linn subconsciously thought that these two were taboos in alchemy.

But Professor Green woke him up.

Yes, although magic and alchemy have something in common, they are two different systems and cannot be generalized.

Moreover, the time turner itself is an alchemical product. If time was really a taboo in alchemy, then there would be no time turner.

After telling Linn the basic rules and two taboos of alchemy, Professor Green also talked about many methods of learning ancient runes, as well as the basic knowledge of alchemy, which allowed Linn to learn all the ancient runes.

After reading this article, you can directly enter the door of alchemy without any hindrance.

"Bring this with you, it can weaken your magic power to one-tenth of its original value."

After explaining the theoretical knowledge, Professor Green handed a bracelet to Lin En.

Seeing the crystals inlaid on the bracelet, Linn couldn't help but exclaimed: "Forbidden magic stone?"

You must know that among the achievements of Professor Green recorded on the Chocolate Frog card, there is the Forbidden Demon Stone, and the effect of the Forbidden Demon Stone as known to the public is just to weaken the wizard's magical power by 10%, then

Only a Forbidden Demon Stone the size of the Quaffle can do it.

However, the forbidden magic stone embedded in the bracelet is only the size of a fingernail, but it can suppress 90% of Lin En's magical power!

Could it be that the fact is just like Linn's original analysis, that the Forbidden Demon Stone released by Professor Green is actually a weakened version, and the reason why the initial version of the Forbidden Demon Stone was not released was to prevent it from being used by various parties.
Chapter completed!