Felix knew long ago that the Patronus Charm was a very useful magic.

It has a strong inhibitory effect on certain creatures, such as Dementors and Voldemorts; it can transmit information over long distances and pass through entities, not to mention a series of wonderful uses that Felix developed on his own, but he always had a question, what was this spell originally used for?

Few people realize that the Patronus Charm was not developed specifically to fight Dementors. In fact, the former appeared much earlier - the wizard "Andros the Invincible" who could summon a giant-sized Patronus was active in ancient Greece, and the Dementors were clearly recorded in the 15th century.

Felix once suspected that the Patronus Charm had other uses, but unfortunately he did not find them. He had an idea that in the era when black magic was prevalent, being able to release a Patronus might be considered "having a noble character". Such people generally have both strength and character, and naturally gain the respect of others.

The Patronus Charm naturally became a kind of detector and had a special status.

...

"Please sit down." Felix said.

They returned to the Ancient Runes Office. Harry, Ron and Draco sat on the same couch. Harry felt uncomfortable. He had never sat so close to Malfoy before. He couldn't help looking around. Soon, his eyes fell on the small square table in front of him.

There was a machine that looked like a toaster, and a pile of brown "bread slices" were placed next to it. In the groove of the machine, a "bread slice" was inserted, and the handsome photo of Cedric Diggory was stuck on it, smiling at them.

"Professor, what is this?" he couldn't help asking.

"Magic projector." Draco suddenly interrupted. Harry and Ron looked at him strangely, but quickly accepted this explanation. Although they were reluctant to commit, the wealthy Malfoy family was not unfamiliar with this kind of thing.

"Yes, it's a magic projector." Felix said, he sat on the single sofa next to him, "The samples sent by the Future World Company, I mean those films." He added.

Harry stared at Cedric who was still smiling at him, and a sense of absurdity rose in his heart. "So, this is... these are..."

"The Warriors' performance in the second project." Felix said with a smile, pointing to the pile of flat brown boxes on the table, "All of them. But they certainly can't be sold to the public like this. There are no relevant regulations yet, but Future World hopes to set some standards and self-restraint."

Harry didn't quite understand, but he realized one thing, this thing is similar to the Muggle movie, but this time, he may become the protagonist of the movie, or one of the protagonists. He remembered that the professor said to them after the game: "You will become famous because of this game."

He finally understood the meaning of this sentence.

"So, our performance will be seen by more people?" Ron's eyes lit up and asked impatiently.

"In theory, that's right," Felix nodded, and several plates of snacks and butter beer floated over and landed on the table. He made a "please" gesture and said to them: "But there are still some details, such as the need to consider your own wishes-" "

I agree." Ron said immediately.

Felix laughed.

"Let's put it this way. When you participate in the competition, you implicitly agree to compete in front of the audience. The 'Future World' company only promotes your performance to more audiences. Despite this, there may still be people who don't want their images to be leaked... We will try our best to communicate your wishes."

"So we can refuse?" Harry asked.

"For some insignificant and independent pictures, that's right." Felix said, "If it involves important moments of the game, it won't work. Of course, we will pay a fee, not much, but as I just said, we hope to set some standards." He emphasized. "

It sounds good." Ron said, you can become famous and make money, why not agree? The only worry is that this thing may be very expensive, and the family may not be able to afford it.

Harry was worried in his heart. What if these pictures were seen by the Death Eaters and Voldemort, but he thought again, if the Death Eaters and Voldemort wanted to know his secrets, he would have no way to stop them. There were too many spectators at the time.

"I agree too." He thought for a long time and said. The magic he knew was not a secret except for Occlumency, and Occlumency was not obvious. As long as he didn't say it, others couldn't see it.

Draco's eyes flickered, and no one knew what he was thinking.

"Very good," Felix said, "Then your two's business is settled," he ordered them to leave, "These images will eventually be put together, and you will be invited to watch them before they are released. The payment will also be paid at that time. If there are no problems, it's settled."

Harry and Ron left with mixed feelings.

Only Felix and Draco were left in the office, and Valen was eating crispy finger biscuits. It occupied a single sofa alone, sitting opposite Felix, with the second volume of "The Adventures of Little Wizard Mick" on its lap.

"Do you know about the two magics of Apparition and Disillusionment?" Felix asked.

Draco nodded. "I've looked up the information. They are all advanced magic that can only be learned in senior years."

"Yes, the Disillusionment Charm can be learned in the sixth grade advanced spells class, while Apparition requires teachers designated by the Ministry of Magic to learn, and students must be adults."

"But Potter knows this magic!" Draco blurted out, his face turned pale, "What I mean is--"

"I understand," Felix said with a smile, "He seems to have broken the rules again. This is a reward for being the top student in his third year, and he chose it himself. In fact, it is no big deal for underage students to learn Apparition. Only public use will cause some legal troubles... Fortunately, the first time Potter used Apparition publicly was when he was winning honor for the entire British wizarding community."

"If there is no objection, let's start now."

"The Disillusionment Charm is a spell used to disguise yourself. When using it, you must make the color and texture of your body consistent with the environment behind you and around you... It's easy to learn, but hard to learn well."

"The difficulty of these two magics is different, but both require the mobilization of the body's magic power. In other words, the control of magic power is very demanding. You are still lacking in this aspect, so I have prepared some targeted exercises..."

In the next two hours, Draco Malfoy kept practicing leaving permanent marks in the air. He had to do it all with his bare hands, and there were requirements for speed and beauty.

Draco Malfoy's face was ruddy from the fire. The weather in March was not good, and the fire in the fireplace jumped and crackled.

Professor Heppe said that some teaching aids were not ready yet, so the real practice would have to wait until next week. But when he left, he still took with him a knowledge decomposition chart of the Disillusionment Spell.

This was his homework, and he had to hand in an analytical paper before next week.