" Vine wood?" Felix repeated, and the young witch noticed Professor Hap's expression, visibly dazed for a moment.

"Very good." He commented briefly.

Felix explained, "My personal experience is that magic rune carving knives are very similar to wands, so it's best to pick the same material of your own wand for your first carving knife, except for the chestnut carving knife."

"For example, to me, the ebony carving knife is the most comfortable."

Hermione showed a dawning expression, her heart murmuring, Vine wood for her Exclusive carving knife first choice.

However, it also made her curious, when she bought her own wand, Ollivander once mentioned that it is the wand that chooses the wizard, not the wizard who chooses the wand, and Professor Hap also gave similar advice, what is the secret here?

She expressed her doubts to Professor Hap.

Felix thought about it and said, "That makes sense because Ollivander's Wand Shop never makes custom wands, which means that little wizards have to get used to the traits of wands.."

"So the wands we have in our hands are just roughly compatible with us?" Hermione understood the point he was trying to make.

"It can be interpreted that way, but don't worry, for the vast majority of wizards, there is absolutely no need to consider such fine details." Felix said, "It's still quite an interesting topic, you can check the library and see what kind of wands your friends around have and what kind of traits they represent."

Hermione is indeed very interested, this kind of act which satisfies her desire for knowledge and gossip at the same time, simply makes her want to go back to the library.

"Do you have any recommendations for books, Professor?" The young witch asked, accustomed to asking Professor Hap for a list of books, and getting an accurate response every time.

Sure enough--

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

Hermione mumbled a couple of words and wrote the title of the book down.

"Well, next, is the seventh carving knife." Felix brought the conversation back on track.

The young witch looked at the last carving knife, thin as a dagger, the colour is hauntingly ghastly white, looks like the teeth of some kind of creature. She exclaimed in surprise, "This is the fang of the ... Basilisk?"

"That's right, it occurred to me by chance that I could make a magic rune carving knife from part of the magical creature's bones." Felix smiled and said, "It's just an attempt."

Hermione felt that this material is too wicked, carving out the magic rune with this type of material will not bring its own snake venom or curse, right?

So she asked Felix about it, "So how does it work?"

Felix smacked his lips, but only vaguely said some " developed new ideas ", " next time he will use the unicorn horn as a try " and so on, Hermione wisely did not ask further.

After spending some time explaining the concept of 'magic carving knife', which Professor Hap invented himself, the two finally returned to the original topic - the difference between a single magic rune and a magic circuit.

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

Hermione carefully examined the carving knife in her hand, she realized that this knife will be with her for a long time.

Its colour is somewhat like a light coffee colour, the material is smooth and compact, the top is divided with straight and slender veins, it looks very much like the pattern of the rain flower stone.

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

The ebony carving knife in Professor Hap's hand, like his wand, had been carefully selected from the heartwood, without a trace of stray colour.

It is a pure, deep black, with a dull sheen, giving it an extremely heavy and hard texture.

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

He gently held the carving knife, smoothly wrote down a string of magic runes, red aura from the black tip of the knife bloomed, when Felix lifted the carving knife, the fiery magic rune has quietly extinguished, branded with black traces.

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

"This is the first one."

He then took another piece of chestnut wood, wrote an individual magic rune on it one by one, and after showing it to Hermione, carefully drew out the line to connect them together.

Hermione took the two pieces of chestnut wood at the same time, comparing them with each other.

With what she could associate, the former is like a completed fancy font, elegant, yet at the expense of individual rune recognition; and the latter is a standard font, except written by naughty children with crayons all together, and the former is pleasing to the eye, the latter more like poor quality graffiti, people can not help but frown.

But Felix said to her, "It's the one you need to master." He pointed to the combination he called 'typography + graffiti'.

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

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

From the beginning of the school year, his mastery of this magic had become more and more proficient.

This seemed to allude to Snape's theory - magic that he invented himself would naturally become more powerful for him.

...

When Harry yawned as he walked out of his dorm room on Sunday morning, he saw Ginny and Ron sitting next to Hermione watching something.

"Morning." He said, a little sleep-deprived from training for Quidditch the night before and staying up late.

Harry rummaged through his book bag for his Potions class assignment, but his mind jumbled around.

It took him a few minutes before he noticed the difference among the three across him, "What are you doing?"

Hermione intently writing on a thin piece of wood - he thought it was a piece of parchment, and repeatedly looked at it twice.

The tool she held in her hand is also odd, a bit like a quill, and also looks like a shrunken wand.

But Hermione apparently did not have time to answer him, Harry looked at Ron.

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

Ginny retorted to him, "No it's not, it's a magic circuit."

Ron shrugged, "Something like that," he explained towards Harry, "You know, to fix her little beaded bag."

He looked over the other side of the table where Hermione is sketching out an odd-looking pattern on a thin wooden board that, from his point of view, kind of looks like a large squid in the Black Lake.

The red light kept flowing from the tip of her 'pen' as she wrote so slowly that the initial strokes had cooled to black.

"Whew~" Hermione let out a long breath and wiped the sweat from her face.

"Well, did it work?" Harry asked with interest, although he still isn't quite sure what she was doing.

But Harry reckoned he would have to take Ancient Magic rune next year for that.

Hermione's whole body relaxed, and she said somewhat lazily, "I can't keep injecting magic steadily, it's very different from a single magic rune."

"I remember you said that your success rate is at ninety percent?" Harry asked.

"That's a single magic rune, Magic rune circuit is much more difficult ..." she said with a sigh.