"Grapevine wood?" Felix repeated, and the little witch noticed that Professor Heppe's expression was obviously stunned.

"Very good." He commented briefly.

Felix explained: "My personal experience is that the magic rune carving knife is very similar to the wand, so in addition to the chestnut wood carving knife, the first carving knife is best to choose the material of your own wand."

"For example, I am most comfortable using an ebony carving knife."

Hermione showed an expression of sudden enlightenment, and she secretly muttered in her heart that grapevine wood was her first choice for her own carving knife.

However, this also made her curious. When she bought a wand, Ollivander said that it is the wand that chooses the wizard, not the wizard who chooses the wand, and Professor Heppe also gave similar advice. Is there any secret in this?

She told Professor Heppe her doubts.

Felix thought for a while and said: "This sentence still makes sense, because Ollivander's Wand Shop never makes custom wands, which means that young wizards must adapt to the characteristics of the wand."

"So, the wands in our hands are just roughly matched with us?" Hermione understood what he wanted to say.

"You can understand it that way, but don't worry, for most wizards, there is no need to consider such subtle differences." Felix said: "This question is quite interesting. You can go to the library to check and see what the wands of your friends look like and what kind of characteristics they represent."

Hermione was indeed very interested. This behavior, which not only satisfied her desire for knowledge but also her desire for gossip, simply made her unable to stop.

"Professor, do you have any recommended books?" asked the little witch. She was used to asking Professor Hepp for a list of books, and she would get an accurate reply every time.

Sure enough

, "Well... I remember there is a book "Wands and Wizards" in the library, which introduces hundreds of famous wizards and their wands." Felix said.

Hermione muttered a few words and wrote down the title of the book.

"Okay, next, it's the seventh carving knife." Felix brought the topic back on track.

The little witch looked at the last carving knife, which was as thin as a dagger and had a heart-pounding pale color. It looked like the teeth of some creature. She said in surprise, "Is this... the fang of a basilisk?"

"Yes, I also thought of using some tissues of magical animals to make a rune knife by accident." Felix smiled and said, "This is just an attempt." Hermione

felt that this material was too evil. Would the runes carved out carry snake venom or curses?

So she asked Felix, "How effective is it?"

Felix smacked his lips and just vaguely said something like "It has expanded new ideas" and "I will try using the unicorn's horn next time." Hermione wisely did not ask further.

After spending some time explaining the concept of "rune knife" invented by Professor Hepp himself, the two finally returned to the original topic, the difference between a single rune and a rune circuit.

Felix put away the other knives, leaving only the ebony and chestnut knives, and handed the chestnut knife to Hermione.

Hermione carefully looked at the knife in her hand, and she realized that this knife would accompany her for a long time.

Its color is somewhat like light coffee color, the material is uniform and tight, and there are straight and slender textures on it, which looks like the pattern of Yuhua stone.

Then she stared at the carving knife in Felix's hand.

The ebony carving knife in Professor Hepp's hand is the same as his wand, which is carefully selected heartwood without a trace of color.

It is a pure, deep black, with a dull luster on the surface, giving people an extremely heavy and hard texture.

Felix picked up a thin piece of chestnut wood and said to Hermione: "Whether it is a carving knife made of wand material or a chestnut wood piece, it is very friendly to magic, so carving magic runes is more like writing an article."

He held the carving knife lightly and wrote a string of magic runes smoothly. The red light bloomed from the black tip of the knife. When Felix lifted the carving knife, the hot magic runes had quietly extinguished, leaving a black mark.

"There are two ways to write a magic rune circuit, one in one go, or one by one."

"This is the first one."

He then took another piece of chestnut wood and wrote the individual magic runes on it one by one. After showing it to Hermione, he carefully drew lines and connected them together.

Hermione held the two pieces of chestnut wood at the same time and compared them.

From what she could think of, the former was like a cursive handwriting, free and unrestrained, but at the expense of the recognition of individual letters; while the latter was a regular print, except that a naughty child connected the letters together with crayons. Compared with the former's pleasing appearance, it was more like a low-quality graffiti, which made people frown.

But Felix said to her: "You need to master this one." He pointed to the combination he called 'print + graffiti'.

"Your beaded bag requires three sets of magic rune circuits. I will explain how they are connected."

Felix snapped his fingers lightly, and the two people's consciousness entered the thinking hut.

Since the beginning of the school year, he has become more and more proficient in controlling this magic.

This seemed to be consistent with Snape's theory that magic invented by oneself would naturally increase in power.

...

On Sunday morning, Harry yawned and walked out of the dormitory. He saw Ginny and Ron sitting next to Hermione, looking at something.

"Morning," he said. He practiced Quidditch until very late the night before, so he was a little sleep deprived.

Harry took out the homework for Potions from his schoolbag, but his mind was in a mess.

It was not until a few minutes later that he noticed the strangeness of the three people opposite him. "What are you doing?"

Hermione was concentrating on writing on a thin piece of wood. He thought it was a piece of parchment and looked at it repeatedly.

The tool in her hand was also strange, a bit like a quill pen, and like a shrunken wand.

But Hermione obviously didn't have time to answer him, so Harry looked at Ron.

Ron whispered to him, "It's a magic loop."

Ginny retorted, "No, it's a rune circuit."

Ron shrugged. "Pretty much," he explained to Harry, "You know, to repair her beaded bag."

He looked across the table and saw Hermione sketching a strange pattern on the thin wooden board. From his angle, it looked a bit like a giant squid from the Black Lagoon.

Red light continued to flow from the 'pen tip'. She wrote very slowly, and the initial strokes had cooled and turned black.

"Huh~" Hermione let out a long breath and wiped the sweat off her face.

"How was it, did it work?" Harry asked with great interest, although he still didn't quite understand what she was doing.

But Harry estimated that he would also take the Ancient Runes course next year.

Hermione relaxed completely and said lazily, "I can't always inject magic power stably. The difference between individual runes is too great."

"I remember you said that your success rate was 90%?" Harry asked.

"That's a single rune. The rune circuit is much more difficult..." She sighed and said.