Coming out of Flitwick's office, Felix found an opportunity to be alone with Snape.

"So... Barty Crouch Jr. didn't plan to secretly poison us all?" Felix asked. He actually wanted to know what potion Barty Crouch Jr. made in the Chamber of Secrets.

"Then he had to be careful enough to avoid the hundreds of eyes in the kitchen." Snape squinted his eyes and said, "It was a potion used for emergency use to keep the dying alive. I identified unicorn blood and a variety of highly toxic materials, as well as an unknown type of snake venom."

"Sounds like a curse?" "

Almost. The process is extremely painful, but the effect is obvious, isn't it?" Snape said, opening the door of his office. His office has not changed much. The light is dim, and the shelves against the wall are full of glass specimen jars. Felix

thought of the groans of Voldemort that he heard in the Crouch old house, and he almost understood this statement. He looked around and said dissatisfiedly: "I remember I gave you a magic lamp..."

"A qualified pharmacist will not easily change his living conditions," Snape said calmly, his eyes swept across the row of large and small jars on the wall, "and there is a sentence you didn't write in the product introduction. The light emitted by the magic lamp has an effect on some dark creatures."

Felix thought about it and it was true. The principle of the magic lamp is to solidify an illumination spell and then release it slowly. The illumination spell has the effect of breaking through the fog and driving away dark creatures.

But this additional effect is not strong, and it can't even hurt the lowest level of corpses.

"Remus is fine." Felix said.

Snape groaned and said slowly, "Unlike werewolves, potion materials are very delicate and need special spells to preserve them to prevent the loss of magic power. I remember I talked about these things in class?"

"A person's energy is limited, and I happen to know you and Belby, so I naturally don't plan to spend too much time on potions. For me, it's enough to know some necessary knowledge, such as how to detoxify." Felix said tactfully, "Why don't we talk about ancient magic runes?"

Snape glared at him, "I put the magic lamp in the bedroom."

Felix shrugged and found half a bucket of gray mucus in a suspicious corner of the office, sealed with a transparent lid. He leaned over and looked at it, "Is this collected from the blasting-tailed skrewt?"

"It is slightly corrosive. I haven't found a good way to eliminate its characteristics yet." Snape said softly.

Felix blinked, "How about using illumination?"

Snape stared, standing there for a long time before saying dryly, "Also... not impossible... worth a try..."

Soon, he took out a few drops of mucus from the bucket. When he opened the lid, the strong smell of rotten fish and shrimp instantly filled the whole room. Felix immediately cast a human armor charm on himself. He had used this magic to replace the Bubblehead Charm.

"Do you need help?" He asked muffledly through the magic. Snape's face was pale, but his fingers were very steady.

"No," Snape squeezed out a sentence from his throat. He smelled a hint of temperature, his face turned even paler, and his throat couldn't stop squirming. He quickly closed the lid and sealed it again with magic. Felix cooperated and rolled up a whirlwind out of thin air, throwing the turbid air into the corridor of the office.

I hope there won't be any little wizards who just finished their meal passing by.

Snape held his breath. He transferred the wet mucus into a small glass bottle and quickly plugged it in. After completing all this, he took a deep breath.

On the other side, Felix's palm was already holding a ball of light the size of a ping-pong ball. Except for a faint white halo on the surface, it did not emit any light. It looked like a glowing glass ball.

Snape directed the small glass bottle to float over, and Felix controlled the light ball to approach at the same time. The light ball effortlessly drilled into the bottle, and then he quickly cast a spell on the outer wall of the glass bottle to prevent the light ball from escaping.

Without Felix's restraint, the light ball completely expanded and filled the entire internal space

. "It doesn't seem to have any effect." After a long time, Snape said uncertainly.

"What effect do you want, a sizzling sound? That's too rough. The light of illumination is very gentle. Even if it is released close to the face, it will at most cause some dizziness and blurred vision, but will not damage the eyes." Felix explained.

He had already sat back on the sofa, leisurely picked up a book, and flipped through it casually: "Wait, let the magic slowly take effect. Sometimes the process of soaking the material with magic power alone may last for several months."

Snape stared at the small glass bottle in his hand for a long time, and his eyes suddenly flashed.

Felix was startled, thinking that he was going to say something clever and harsh, but Snape just couldn't wait to say, "Let's try it a few more times! Use different conditions and let them contrast each other."

"Oh..." Felix dragged out the sound, he didn't want to see that sticky thing again. "Wait a minute." He muttered, and took out an Ouroboros ring from the ring. Under Snape's weird gaze, a dozen small balls emitting hazy white light appeared in front of him in a short while.

Then, the Ouroboros ring in his hand suddenly moved, and the little snake twisted its body and swallowed all the light balls one by one, then turned back, hovered in Felix's palm, and turned into a ring again.

He handed the Ouroboros ring to Snape, "It can store ancient magic runes. Of course, the essence is that its material can isolate magic well and greatly reduce the overflow of magic itself...so it can also be used to store illumination."

Snape took it and took a quick look, "Basilisk scales?"

Felix nodded.

...

When Felix returned to the office, the Sniff Valen immediately pounced on him, grabbed his clothes and tried to climb up, but then his movements stopped abruptly.

He retracted his two little hands and twitched his nose slightly. The little face immediately wrinkled, and the black and bright little eyes looked at him with accusation.

Felix was stunned for a moment, and smelled his clothes. "It smells?"

Valen nodded vigorously and made a retching motion.

"It may be the smell of the mucus of the blasting-tailed skrewt larvae," Felix guessed, "Your nose is really sensitive. I'm covered with the human armor spell, but you can still smell it..."

Valen looked at him triumphantly.

Felix cast a few cleansing spells on himself. Valen moved over step by step, sniffed tentatively, and after confirming that there was no unpleasant smell, he jumped into his arms.

At this time, Felix was holding Valen, thinking that the sensitive nose of the Sniff should not be wasted. Should he add some "extracurricular practice" to the normal literacy?

At least it wouldn't hurt to learn to recognize the smell of some poisons.

In the evening, Harry came to learn Occlumency.

During the Christmas holidays, Felix explained some techniques of Occlumency to him, which made Harry confused and at a loss. In the end, Felix had to let him continue reading the magic book.

Harry came every two days, and sometimes he would run into Hermione, but in the fourth year, Hermione didn't come every week. Her attainments in ancient magic far surpassed everyone except Felix.

At her current level, even if she didn't make any progress, she would be more than enough to be a professor. So Felix now just assigns tasks and answers questions for his assistants from time to time.

Harry turned the book to page 5 and stared at the portrait of the wizard on it with disgust. He was not unfamiliar with this picture. He had seen it when he was browsing materials in the restricted books area. This wizard was originally the cover of a banned book. Ron thought he looked like Draco Malfoy at the time.

But this time the feeling was completely different. In a trance, Harry found that the wizard's face seemed to have changed into his own. He was being tortured on his behalf... This was an illusion. His heavy breathing sprayed on the wizard in the book, and then he felt that his skin was hit by a hurricane.

Harry held his breath, his face flushed, and he kept reminding himself that all this was the effect of Professor Hep's magic. He was really good at this...

Harry knew clearly that his body was not injured at all, but his brain was infused with completely opposite emotions.

I can't go on... I must stop this feeling, otherwise I will definitely go crazy... Let me think about what is the most basic method of brain occlusion. Keep calm and empty your mind... Huh... Huh... It's too difficult. Harry felt as if he was thrown into a nest of blasting-tailed skrewts. Dense blasting-tailed skrewt larvae crawled all over his body, and their tails sprayed sparks, making him itchy and painful...

I want to empty my mind... Empty my mind...

But why! Harry thought angrily, and suddenly a strong anger surged in his heart. This anger broke through the shackles of magic. He saw clearly that he had stood up around him without knowing when. The magic book fell at his feet, and he was gasping for breath.

Professor Hepp's voice rang out from the chair behind the desk:

"If you can use it well, anger is also a good way, but it's obvious that anger is not an emotion that can be maintained for a long time, and people are not powder kegs, and it's impossible to lose temper at any time and anywhere, but... well done, you passed this time."

Harry didn't get much comfort from this sentence. He asked a little frustratedly: "Am I very bad?"

Felix looked at him very understandingly: "Brain occlumency is an extremely difficult spell. Many wizards can't get started in their lifetime. The best way to learn is to let your brain experience the feeling of being 'invaded' again and again. Of course, the degree of this is difficult to grasp, and I happen to have some experience..."

Harry certainly didn't know that the 'experience' the professor mentioned was to invade other people's brains. This experience came from Felix's one year of traveling alone. With the 'help' of many dark wizards, he struggled to master the prototype of the magic of the mind hut.

And now it seems that all the efforts are worth it. This magic has undergone earth-shaking changes.

Harry could only take Felix's words as true. He sat down and thought about it, and decided to play a game of cards with Valen to relieve his tense mood. However, when he found out that he had lost to Valen, his mood became even worse.

As a result, he still had a sullen expression on his face when he returned to the common room.

"Is that book really that scary?" Ron asked quietly, while secretly handing Harry a bottle of butterbeer. "The last time Fred and George went to Hogsmeade to buy stock, they actually asked me for five Sickles!"

"Yeah, three brooms for only two Sickles." Harry said woodenly. He was not in good condition now, and it was difficult for him to feel sympathy for Ron. He took a sip of butterbeer, and the thick foam refreshed him. He felt alive from the inside out.

"Talk about that book again, Harry." Ron stared into his eyes and urged.

"Well... you need to face a lot of terrible emotions, and you have to do your best to prevent them from affecting you... In short, it's terrible. The professor said that if I can finish reading it in one go, it means that I have mastered the art of occlumency, which is a remarkable achievement." Harry said intermittently, taking the opportunity to drink up the butter beer in his hand.

He looked at the empty bottle with some regret, wondering whether he should find Fred and George. If he could drink a bottle of hot butter beer after each practice, it would not be so difficult.

"The professor is right," Hermione said on the side, looking up from a large book, "I have read its theory. Even those who have mastered the art of occlumency cannot necessarily tell how they learned it. They usually learn passively."

"Passive learning?" Ron looked at her in confusion.

"Being invaded." Harry said, and he relayed what the professor said to him to Ron, "The best way to learn is to let your brain experience the feeling of being 'invaded' again and again." He thought for a moment and added, "I guess this is to make the brain sharp enough."

Ron's enthusiasm obviously faded.

"You want to learn this?" Harry asked. He didn't quite understand this idea. Ron laughed dryly and hesitantly said, "Isn't this magic difficult? I thought, if I learn it..."

"It will be very face-saving if I tell others." Hermione helped him to complete the unfinished meaning of his words.

"In fact, there is a simple way. The professor mentioned it to me... Remember my Dementor doll? The professor said that thing is equivalent to a simple magic book. If you want to try it, I can lend it to you." Harry suggested. The thing is now locked under the box.

Ron was quite tempted, but after thinking for a long time, he gave up. He lay on the table and muttered, "I'd better study the magic for the second project. What do you think, should I learn the Bubble Head Charm or the Extraction Charm first?"

"The Bubble Head Charm is for senior grades." Hermione reminded him.

"But the Armor Charm isn't easy either. I haven't even met the entry requirements." Ron groaned, "I think I'll drown, Harry. I'll be the first warrior to be eliminated."

"Don't think so," Fred's voice suddenly appeared, and he sat down next to Ron. He said with a smile, "Think positively, maybe Ilvermorny will be at the bottom again this time."

"I suggest you practice swimming, otherwise it would be too embarrassing to run out of energy halfway through swimming." George grinned.

"You reminded me," Hermione said, "I only focused on the magic part." She took out a small notebook from her schoolbag and wrote down George's words. Harry knew that it was Hermione's plan for the second project. So far, half of the book has been filled. He and Ron have never had the courage to look at what is written on it.

At this time, Ron suddenly raised his head, as if he had thought of something, and stared at Fred and George in a daze.

"Do you know the Bubble Head Charm?" Ron asked bluntly.

"Oh... Of course, this is a magic that must be mastered for pranks. We have suffered some losses in the past..." Fred said with emotion.

"Teach me." Ron said.

"What?" Fred and George looked at each other.

"Teach me the Bubble Head Charm." Ron repeated.

Fred and George looked at each other, and Fred said, "Listen, we are very busy. We have more than a dozen products waiting to be perfected."

"Okay," Ron said cheerfully, and then muttered in a voice that everyone could hear: "I don't think I have written to my family for a long time. Mom must be worried about me, and she may know the Bubble Head Charm and can give me some advice..."

Fred and George stared at Ron, as if they had met him all over again.

The two exchanged opinions quickly with their eyes. After a while, Fred said angrily, "Okay, you win, little Ronnie."

Ron smiled triumphantly.

When the two of them left, Ron had not yet recovered from the joy of victory. He said excitedly, "I've wanted to do this for a long time."

"You mean..." Harry said slowly, with a bad feeling in his heart.

"Beat them once!" Ron said loudly.

Harry fell silent. He didn't think it was a good idea to ask someone to help with training by coercion. Regarding this point, he was deeply aware of it as he was undergoing special training. Professor Hep was already friendly enough, but he still felt that life was difficult. If Snape taught him, he couldn't imagine what he would encounter.

He had already expected that Fred and George would come up with all kinds of weird ways to mess with Ron, and the key point was that Ron himself came to the door.

But seeing Ron's satisfied expression, Harry decided to tell him his worries later.

Late at night, when Harry was lying in bed tossing and turning and couldn't sleep, his ears were filled with Ron and Neville's snoring, he thought it would be a good idea to let Ron try. He could just use this time to think of words to comfort him in advance...