A certain Hogwarts professor of runes

Felix gently rubbed the inside of his wrist, where there was a flesh-colored line about the size of a fingernail. Few people would notice this pattern unless they zoomed in and examined it carefully.

This pattern is actually an ancient magical script loop, with a small space hidden inside.

Inside the space was a spare magic wand.

After all, the pattern is too small, and there's not much that can be hidden inside. Moreover, this ancient magic rune loop has always been closed, and it can only be opened when certain conditions are met.

The condition for opening it is to smear a layer of one's own blood.

This is his most secretive and most difficult-to-detect backup plan at present.

When he finds himself in a disadvantageous position, or is disarmed, loses his wand, or even has his ring stolen, this rune circuit will help him turn the tide.

As long as he isn't killed on the spot, he has a chance to turn the tide.

The ring on the left hand is in the light, while the magic runes on the inside of the right wrist are in the dark, one in the light and one in the dark, almost perfect.

Now, Felix is ​​also preparing to complete the construction of the third cave.

The reason he was so cautious was not because Hogwarts was a den of dragons and tigers, hiding some great danger, or because he was preparing to do something. Rather, it was because he knew that from the day he became the professor of Ancient Runes at Hogwarts, he had officially become involved in the "plot".

Given his limited understanding of the plot, it would be difficult for him to have foresight, so he had to take precautions early on.

He doesn't believe in so-called "fairy tales," he only believes in his own strength.

However, no matter how little he knew about the plot, he still understood some of the most basic things.

For example, Harry Potter's adventures in his previous life were made into eight movies. If we assume one movie per school year, that's eight years in the wizarding world. This fits Felix's imagination: seven years of adventures within the school, plus a year after graduation to completely defeat Vader. No problem.

Very rigorous reasoning.

A school year has already passed, and if nothing unexpected happens, Voldemort will be completely dead in seven years.

Thinking of this, Felix felt somewhat relieved.

He is certainly no match for Voldemort now, but the future is uncertain.

Felix went out and walked the streets of London, strategizing for his future.

Half an hour later, he stood in front of a dental clinic—the very one he had discovered a month earlier.

Felix pushed open the door and entered, the bell at the door ringing crisply.

A middle-aged man in a white coat peeked out from the inner room, glanced at Felix, and asked, "Are you here for a dental checkup?"

Felix replied simply, "I want to get my tooth filled."

The dentist nodded and led him to a chair. "Please sit down. My name is Will Granger, you can call me Dr. Granger."

"I am Felix Heap."

Dr. Granger had him lie down in a chair and examined Felix's mouth with something like a searchlight, looking somewhat puzzled. "Mr. Hyp, your teeth are in very good condition, very clean, very straight, and very symmetrical in size..."

Felix pointed to the upper left side of his cheek. "I want to get a wisdom tooth fixed."

Dr. Granger paused, this was indeed a strange request; wisdom teeth weren't particularly useful. He said sincerely, "Mr. Hyp, I don't recommend you get a wisdom tooth filled, because..."

Next, Dr. Granger demonstrated his professionalism by giving him a full twenty-minute lecture on dental knowledge.

During this time, a little girl with fluffy hair walked in. She was about twelve or thirteen years old. She glanced at the two of them, and especially when she saw Dr. Granger's incessant talking, she showed a look of utter despair, as if to say, "Here we go again."

Finally, Felix had to interrupt him, "Dr. Granger, how about this, you can make the tooth for me first, and I'll decide whether I need it filled after I've tried it."

Dr. Granger thought about it and agreed that it made a lot of sense. He took out a pen and paper to record the dimensions of Felix's mouth, and after comparing and contrasting them on the paper, he quickly confirmed the size and shape of the wisdom tooth.

He then went into the inner room and began to work.

Felix looked around the clinic with great interest, especially at one wall covered with small cabinets, through which enlarged dental models could be clearly seen.

Just as he was engrossed in watching, a confident voice appeared to his left.

"Filling a tooth is not the best option, especially for a wisdom tooth that is not essential."

Felix turned his head to look at the little girl, and then heard her add, "It will hurt a lot."

"It hurts a lot? How much does it hurt?"

"First, we need to drill a hole in your gum with a small drill bit, then drill a hole in your artificial wisdom tooth in the same way, connect it with screws, and then fix and adjust its position."

Felix suddenly started to have a toothache...

The little girl continued her explanation: "Even after a filling, it's not a permanent solution. On the contrary, damaged gums are more susceptible to further damage. If you have poor oral hygiene habits, it can even lead to gum decay and plaque buildup, causing existing teeth to loosen and fall out, requiring further repairs..."

"Stop talking!" He already had a picture in his mind.

Although he can use magic to heal and relieve pain, his heart is now wounded.

Seeing Felix's uncomfortable expression, the little girl tossed her long, fluffy hair and ran to a corner to read a book. It was clear that she was in a very pleasant mood.

Nearly twenty minutes later, Dr. Granger came out again.

He held a silver-white tray in his palm, on which was an artificial, polished, and refined tooth.

"Looks great, doesn't it?" Dr. Granger praised his own skills.

However, Felix simply nodded; he was startled by what the little girl had just said!

Following Dr. Granger's instructions, he tested the artificial wisdom tooth, without drilling or wrapping it with wire, simply to test its comfort.

"Very good!" Felix praised. "However, I've decided not to get any more fillings."

"Really? It seems you made the right decision." Dr. Granger wasn't angry about losing a business deal; instead, he was happy for him.

However, the customer made a new request: "I want to buy this tooth as a souvenir."

"A tribute?" Another strange request, Dr. Granger thought to himself. Even the little girl who was quietly reading a book next to him looked up at him.

"That's right, a commemoration."

"Alright." In the end, Dr. Granger only charged for the materials.

As Felix walked out of the clinic, Dr. Granger still felt something was off. He grumbled to his daughter, "A very strange guest, wasn't he, Hermione?"

Hermione Granger looked up at Felix's figure disappearing around the street corner, shook her head, and lowered her head again to read her book.