Belby looked at him puzzledly. Are you planning to make me go back to school?

"Let's find a place to sit down and talk. How about the three broomsticks of Hogsmeade?" Felix suggested.

"No problem." Belby said a few words to his brother and walked over quickly.

Snape had already left, so the two of them used Apparition to go directly to the door of the Three Broomsticks Tavern.

"It's a great experience, Felix. I didn't even feel uncomfortable." Belby said admiringly: "I usually don't use it when I'm on the road, unless I have to..."

Felix and Belby walked into the tavern. Today is the weekend. There are little wizards from Hogwarts sitting in twos and threes, especially couples. They were also surprised to see Professor Hepp and a stranger walk in.

"Is that Professor Hepp's friend?" Clemmy Vera thought to herself, and the girl next to her stared at the two curiously.

Felix chose a seat in the corner. Madam Rosmerta came over to write down their orders and brought them over in less than a minute.

"A glass of low-alcohol mead."

"A glass of pear and lemon wine."

She twisted her waist and left.

Felix knocked on the table, and the noise around him suddenly became weaker.

"Felix, what's this?"

"It's best not to let the little wizards know about our conversation." Felix pointed to a place not far away, and several little wizards looked out curiously. He even saw a few familiar faces.

Then, Felix introduced him to the experience of the last Defense Against the Dark Arts class.

"So that's how it is. I didn't pay much attention to it." Belby said.

"There is something I must remind you of. The rumors about this class being cursed in the outside world..." Felix concealed the existence of Voldemort and used a powerful wizard to represent the source of the curse.

"Hmm..." Belby hesitated. "According to you, I only need to teach for half a year, and the curse won't affect me?"

"From the experience of the past few decades, it is true. Most of the wizards who have taught Defense Against the Dark Arts are still alive and well, except for a few -"

"But they all have their own reasons, Damocles, you are an excellent wizard, and the substitute teaching time is shorter, so this danger can be almost ignored."

Felix said sincerely: "Hogwarts has the largest collection of books in the world, I think it will be of great help to you at this stage."

Belby's eyes lit up, "Indeed... I have spent more than ten years studying wolfsbane potion, and what bothers me most is the lack of similar research materials."

Potions masters are a group of wizards who are more homely. They have less time for socializing, which is related to the nature of potions - a potion takes one or two months to brew, and if you want to make improvements, you have to conduct at least hundreds of experiments. His

mind became active, and maybe he could use half a year to recharge himself - the word "recharge" was also learned from the Muggle world.

What's more, there is a potion master in Hogwarts who can communicate with him;

plus the double temptation of the Forbidden Forest and Mrs. Sprout's greenhouse...

"If I agree to teach, do you have any suggestions, Felix?" Belby asked, he was already tempted.

Felix thought for a moment and said, "I suggest you prepare a few magic defense items - I can provide them to you. No, no, there is no need to be nervous. I am just used to dealing with problems actively." He looked at Belby's expression and added. "

Secondly, when you communicate with Dumbledore, you can learn more about this course from him, especially those wizards who used to teach the Defense Against the Dark Arts course - what is their current situation? You can even visit some of them."

"Finally, prepare for the class in advance. The level of the young wizards in Hogwarts may be beyond your expectations."

Belby smiled: "I also graduated from Hogwarts, Felix, I know my level at that time."

...

That day, Felix told Dumbledore about this matter.

"So, we will soon have an excellent professor?" Dumbledore showed a pleasant expression on his face. "To be honest, I was just about to send out the recruitment advertisement."

"Principal Dumbledore, Belby is just a little interested, and you still need to communicate with him in detail. I will not participate in this aspect. But - he is one of the few friends who can talk to me, and I hope you can ensure his safety." Dumbledore looked

at Felix with his blue eyes, and he smiled gently and said, "Of course."

In the next few days, Felix didn't pay much attention to this matter. He attended classes, answered questions, and studied magic step by step.

This rhythmic life made him blur the sense of time.

A week passed quickly.

On a sunny afternoon, the snow in the castle began to melt, and snow water flowed on the eaves.

The Weasley twins blocked him at the end of class.

The two took out two coins with a smile, and Felix took them. He couldn't help but suspect that they had scrapped the "Fevernut".

But to his surprise, the coins were intact, and there were some extra things.

Felix stroked the copper Knut in his hand and looked at the twins, who also gave him a sly look.

"Are you testing me?"

He felt the magic inside. After more than ten seconds, he pinched one of the coins and injected magic into it. The other copper Knut quickly became hot and its surface became uneven.

Felix looked at it carefully. Several abbreviations appeared on the terribly hot coin. He tried to figure it out and found that the most suitable sentence was -

'Filch is coming, run away! '

Felix: "...Is this your night tour prop?"

"Uh, Professor Hepp," Fred said, "Don't you think this is a good emergency item - it should be used when the Aurors raid the magic black market, such as filling in the loopholes in the defense line."

"Or it can be used to pass secret codes between lovers, and the words on it are filled in randomly." George said.

Haha.

Felix would never believe that they originally developed this thing for the convenience of night tours.

Moreover, what magic black market... I think you are implying something to me.

But - their ideas are very open, just like the two situations they mentioned, they are indeed feasible.

"Then what is the purpose of your coming to me?" he asked.

"Professor Hep, we have encountered some problems - for example, the words on the coin are fixed, and we have no way to change them."

"The coin itself is too small, and there is no way to write anything."

"Yes, we hope to develop a two-way communication gadget, similar to a two-way mirror, of course -"

"- the cost is lower!" "

- it is easier to make!"

They looked at Professor Hep eagerly, hoping that Professor Hep could answer their confusion.

In the past few years, some prank props were studied by the twins themselves, but many ideas could not be realized and had to be shelved.

Fortunately, Professor Hep promised that they could ask him for help at any time.

When the twins finished speaking, Felix fell into deep thought and stood still.

After a few minutes -

the two looked at each other, and Fred said a little stiffly: "You just need to give us a little hint..."