"Dobby, can you stay here? We can talk later?"

"No, Dobby must go back to the master... Dobby sneaked out when the master was visiting a friend." Dobby emphasized: "A very close friend! The master did not allow Dobby to follow."

"Then come at your time. I have something important to tell you. No, not now. I need time to prepare. You can notify me in advance." Felix waved his hand, and a round brass metal piece flew over from the workbench.

It was a copper nut.

He threw the coin to Dobby, and Dobby reached out to catch it and looked at it carefully: "No, no, Dobby can't take it. Dobby should not get any money." He said in panic. From the look of him, it seemed as if he was holding some vicious black magic item.

Felix sighed: "That is for you to notify me. If you inject magic power in advance, I will receive the information."

This thing is also a pair of magic products, a bit like a two-way mirror, but the function is far worse than that.

It is just a pair of copper nut with "synchronous magic" applied. If you inject magic power into one, the other will get hot.

'Fever Knut' is a derivative of the answer parchment made by Felix. It is the product of the collective imagination of those little wizards. It does not have much technical content.

Felix also made it casually, and he gave each member of the research team a pair.

The Weasley twins are very interested in it. Felix thinks that it will not be long before they will show him the remains of the 'Fever Knut'...

After hearing what Felix said, Dobby was relieved. He carefully looked at the coin in his hand, and his eyes seemed to be shining.

"Is this a gift for Dobby?" He tilted his head and asked with the copper Knut in his hand.

"-You can say that." Felix did not intend to take it back.

"Mr. Hep is so generous. This is the first time Dobby has received a gift!" The elf was moved to tears.

Felix: "..." If you feel happy, I have a lot of similar things.

Under his gaze, Dobby bowed to him, then snapped his fingers lightly, and his figure disappeared.

"What an interesting talent." Felix said in admiration.

House elves are very magical creatures. They have many "quasi-wizard" abilities. For example, the technique of disappearing just now is very similar to the wizard's Apparition, but the principles of the two are completely different.

At least, as far as Felix knows, Hogwarts has arranged a large number of anti-Apparition spells, but this spell does not work on some magical creatures, such as phoenixes and house elves.

In addition, house elves can also control various small objects, which are very convenient for doing housework and cleaning rooms; they also have strong offensive power, although this ability has been firmly bound by magic contracts.

But these are not magic familiar to wizards, but only the talents of magical creatures. They naturally have these abilities, just like birds and snakes can enlarge and shrink their bodies at will according to the space they are in.

...

When Felix returned to the hall, the three professors were still carefully instructing the little wizard.

It has been two weeks since the last duel class, and many senior wizards can barely release the disarming spell.

Felix saw the two little wizards look at each other, chanting spells loudly, but awkwardly shooting clusters of sparks from the tip of their wands. Then, inadvertently, they released a real disarming spell, heading straight for him.

"Miss Bulstrode, be careful with your spells." Felix deflected the spell and said to the strong witch. He looked at her for a few more times. If he was not mistaken, his assistant got the cat hair from her, and wore a knitted hat for three weeks.

"Oh, sorry, professor." Millicent Bulstrode said a little flustered.

"You have to pay attention to the angle of the wand, and use force when waving it, as if stabbing it out. And... faith is very important, don't play around, it will seriously delay your progress."

After Felix instructed a few little wizards, he came to Professor McGonagall, and there was a small circle of people around her.

She was standing in front of a pair of little wizards excitedly, praising loudly: "Potter, a very good disarming spell." She wiped the corners of her eyes.

When Felix looked over, a red light flew out of Harry's wand and accurately hit his opponent, Hermione Granger.

Her wand flew out of her hand, drew an arc in the air, and was quickly caught by Harry.

The little witch looked angry.

Harry handed him the wand with some embarrassment, and just as he was about to say something, his next opponent had already stood up.

Felix was surprised to find that opposite Harry, there was actually a long line of people, surrounded by many little wizards, looking at Harry with admiration.

What was going on?

When Hermione saw Felix, she quietly came over. "Professor Hepp."

"What's going on?"

"Well, Ron mentioned that the reason he learned the Disarming Charm was because he was hit by the spell too many times when he was practicing with Harry." She said with her head down.

Felix looked at Ron, who was explaining it with great joy, and felt it was ridiculous.

But...is this possible? Even he couldn't be sure.

This view is really too outrageous, and it is impossible to think of it without a clear mind.

He looked at his assistant, "So, you believe it too?"

Hermione said awkwardly, "I didn't believe it at first..." But as more and more little wizards came to ask to practice with Harry, she became undecided.

She cleverly changed the subject: "Professor, everyone says that you have mastered the sixth-level spell." Hermione stared at Felix's expression, trying to see something.

"Really?"

"Yes!" Hermione said emphatically, "Professor, what do you think?"

"My idea is, Miss Granger, we have to work overtime on the weekend."

"Uh what?"

"Correcting the homework from the last duel class."

Hermione looked at him blankly, and she couldn't help looking around, looking at the hundreds of little wizards in the hall, who were practicing spells with great interest and enthusiasm.

In their eyes, this was a game that was novel and interesting enough.

Occasionally, when a spell went astray or a cluster of dazzling sparks were sprayed, the hall would burst into laughter.

But in the joyful atmosphere, she suddenly lost this joy and felt a little flustered.

After seven or eight minutes, Felix came to the stage to end the class.

"I have seen your progress, little wizards."

"Prefects of each college, please collect the homework assigned in the last class. I will take the time to give suggestions one by one - if your data is not made up."

Many little wizards lowered their heads.

When the little wizards left the hall, their faces were filled with bright smiles.

"Hermione, you don't look very good." Ron said.

He was in a very good mood. In fact, because of the special contribution award, Ron was very popular during this period, especially after solving Lockhart's troubles, his detention was mostly cancelled by Professor McGonagall.

"Really." Hermione walked away with her head held high.

"Harry, I think it's because of you. Your disarming spell is just stronger than hers." Ron said to Harry.

Harry scratched his head.

The next morning, a piece of news dropped directly into Hogwarts, overwhelming all other news.

"Gilderoy Lockhart: A fake adventurer! He will face multiple trials soon." A little wizard took the newspaper delivered by owl and read the headline on the front page aloud.