Pessatuben didn't care if Harry thought of him as a newbie or not. At least in some ways, Harry was still quite rational.

What Posatu cared about the most was probably the man in front of him who was walking away in a black robe.

"What are you spacing out for?" Severus asked, because Pessatuben had just bumped into him again.

"I'm sorry, Professor." Posthumben touched his forehead that was hit.

"Don't tell me you don't want to keep your brain smart this soon?"

Severus mocked. "Even if your results aren't ideal, you don't have to use this kind of punishment.

Or are you saying you don't want to complete your experiment? "

"No, no." Pessatuben hurriedly shook his head. "I'm looking forward to the moment my experiment succeeds."

"Then take your brain with you and keep up."

The office was as gloomy and cold as ever.

After entering the office, Pessatuben naturally cast a Fire Charm on the fireplace.

Severus frowned but didn't say anything.

"Professor, should we continue the procedure from last time?" Pessatuben asked.

The two of them were trying to research a new type of medicine that could instantly heal wounds. Their inspiration came from the wound Pessatuben had inflicted on Godless Shadow Peak.

The medicine was supposed to be able to quickly remove scars and heal wounds, regardless of how long the scars had been there.

Pessatuben thought it would be popular with girls who liked to look pretty.

Of course, when Pessatuben first suggested it, Severus wasn't interested. It was only when Pessatuben brought out the Prins' library that Severus perked up a bit.

In the end, Severus settled on six ingredients, but the experiments afterwards were very difficult. The order of placement, the condition of the ingredients, and the boiling time all directly affected the effectiveness of the medicine. Even if they experimented every day, it would still take a long time. The two of them could only shorten the time by half. They were clearly still far from success.

"Flying Crucibles." Severus summoned two crucibles, placed them in front of him, and lit them up.

Pessatuben carried a pile of ingredients from the materials room.

"Professor, I think we are actually very close to success."

Pessatuben remembered the results of the last experiment. "The effect of the drug is close to the expected effect."

"I thought you were praising yourself?

Mr. Prins?

Or have you been blinded by this achievement? "

"No!"

Pessatuben skillfully cut up the materials, crushed them, and put them into the crucible. "I'm saying that you're amazing. Well, what I mean is that you can succeed before the end of this semester!

Bonus points for Slytherin! "

Severus ignored Pessatuben's praise and agreed with the latter part.

Pessatuben felt that the time they spent together always passed very quickly. Finally, there was some progress in the experiment.

Pessatuben's stomach growled.

"I almost forgot that Mr. Prins is still growing," Severus finished the last step expressionlessly.

"Put away your experiment. I think they're done."

Pessatuben nodded. "Yes, it can be poured out."

Pessatuben put the drug into glass bottles and labeled them. "Do you want to test the results now?"

Severus didn't answer. He cleaned everything up and put it back in place.

"No. I'll find a creature to test it on." He glanced at Pessatuben's left hand, which was covered by his sleeve.

Bosatuben clenched his fist and smiled at Severus. "Alright." There were many scars on his left hand. They were all caused by people who had cut themselves for the sake of their experiments. In fact, a simple spell could remove these extremely shallow scars, but Bosatuben did not. He treated them as part of his memories.

Severus obviously didn't have the patience to care about them.

Severus went out first, followed by Pessatuben. The two walked to the auditorium together. It was dinner time.

Occasionally, there would be people on the road, but it was clear that after more than a year, everyone was very familiar with the fact that Posatu was Professor Snape's follower. Furthermore, no one dared to challenge Severus. If they were caught, their marks would be deducted. No one wanted to be isolated by their peers in this aspect.

After dinner.

Pessatuben returned to his dorm.

"You did experiments with Snape again?" Draco put down his book and turned around.

Pessatuben changed out of his school uniform and put on comfortable pajamas. "Of course. Apart from what you know about my interests, I'm quite interested in studying potions."

Draco sneered. "Snape is only interested in you. He never liked stupid students. Even I was scolded by him."

"That's his hobby." Pessatuben raised his eyebrows. "I enjoyed it."

"Oh, a person who's blinded by love. No, it's unrequited love between you two," Draco mocked.

Pessatuben took out his wand. "Come, Draco. Let me see what you're capable of."

Draco knew that his words had rubbed Pessatuben the wrong way, but apologizing wasn't going to change anything. Plus, the two of them had been practicing magic together for a long time. Draco improved every time they practiced, so he took out his wand as well.

They were all harmless little curses that didn't cause any substantial harm.

During the sparring session, the audience could clearly feel that Posthumous was going easy on the two of them. He was also able to use Silent Curses with ease.

Draco was also very familiar with curses, but he only used silent curses, which gave Pessatuben time to react.

If a person was familiar with curses, they would be able to guess what the next curse would be before the opponent even made a sound. From there, they would be able to defend themselves or attack effectively.

"Draco, you're already very good." Pessatuben took back his wand and snapped his fingers to tidy up the messy room.

Draco looked at him enviously. "Ah, but I'm not as good as you."

Pessatuben smiled. "You're younger than me." I'm an adult, Pessatuben thought.

Draco raised his eyebrows.

In the middle of the night, after confirming that Draco was asleep, Posatuben finally decided to go with the trio. He wanted to know what exactly Quirrell, oh, he could also be called the Black Devil King, had smelled from his body back in the Forbidden Forest.

They snuck up to the third floor and saw that the door was closed.

Evidently, the trio had just entered.

Pessatuben pushed the door open, startling the trio. However, Mao Mao was sleeping next to them, so they could only shout in a very clear voice. "Who is it?

Who's there? "

Pessatuben removed the Illusion Curse.

"Pösa!" "Prins!?" "It's you!"

The trio was clearly surprised by the appearance of a Slytherin.

"You!?

You're not going to help Snape steal the Philosopher's Stone, are you? "Harry looked at Pessatuben suspiciously.

"Obviously, Snape has already been here.

If you want to stop us, "Hermione raised her wand." We won't go easy on you. "

"Hey, don't you guys feel that it's a little quiet?" Ron suddenly said in fear.

In a place where the trio couldn't see, Mao Mao had already opened his eyes.

"Quiet." Pessatuben finished speaking and cast a spell on the harp. The harp sounded again, and Mao Mao closed his eyes again.

"I'm not here to steal, nor to help the professor. Also, let me reiterate, the professor would never steal.

Let's go, I need to know something. "

Then, he pushed the big dog's paw away and jumped down.

The trio looked at each other and finally decided to follow. "What if he's just beating around the bush?

Let's keep an eye on him and prevent any accidents. "

After landing steadily, Pessatuben heard someone shouting above him. Then, Hermione landed first.

"You know this is the Devil's Web?"

"Not everyone is as ignorant as Ron." Pessatuben raised his eyebrows. "Lumus.

Solem [Flickering Fluorescent]. "

"Bang! Bang!"

"Ouch! My butt!" Ron covered his butt in pain.

He stared at Pessatuben. "Why are you fine?"

"In the Devil's Web, the more you struggle, the faster you die. On the contrary, if you relax, it will let you go." Pessatuben explained to the two little lions. "Strong light can also make it retreat. Okay, let's go."

Hermione glanced at Ron in disdain.

Harry saw Ron's innocent expression and shrugged without saying anything.

Pessatuben naturally knew their destination. They came directly to a room full of flying keys.

"Wow, look at these birds." Ron sighed.

Harry shook his head. "I don't think these are birds."

"Hey, what's this?

This is a flying broom. "Hermione noticed a broom hanging in the air.

"Alohmora [Lockpicking Spell]." Ron wailed at a door. "This can only be opened with a key!"

"Then what should we do?!" Hermione exclaimed.

Pessatuben looked at the thousands of randomly flying keys. "Harry, you're a ball seeker." Pessatuben took out a seed from his pocket. "I'll disturb the others. Look!

There's a very old key. It should be that one! "

"The one with the broken wings!" Ron pointed at one and said.

"But this … seems too simple." Harry was surprised.

Pessatuben shook his head. "No, I think that when you try to find the real key, the other keys will lock onto you and attack you. Otherwise, why would they put the key in such an obvious place? Wouldn't it be harder to hide it?"

"Harry, you have to be careful," Hermione reminded him worriedly.

Harry nodded with a serious expression.

Pessatuben used his right hand to cast a defense spell on Hermione and Ron. "Go to the door. I'll help him."

The two nodded.

As expected, when Harry got on the broom, all the keys pointed their sharp points at Harry.

Pessatuben shook off the vines and waved his hand in the middle of the keys.

Hermione behind him whispered to Ron, "I've never seen this spell in a book."

"What?"

"Uh …" Hermione was speechless at Ron's stupidity. "Pretend I didn't say anything!"

"Harry got the key." Pessatuben took the key and handed it to Hermione. "Go and open the door." Then, he raised a barrier and shouted at Harry, "Fly over here."

The door was already open. When Harry entered the barrier, Pessatuben quickly retreated and slammed the door shut.

They could still hear the friction of the keys hitting the barrier and the sound of the keys fitting into the wooden door.

"Phew …" The three of them sighed.

They passed through an empty hall and opened the door.

Hermione looked around. "What is this place?"

"Is this a graveyard?" Harry looked at the big and small buildings.

"How is that possible? This is obviously a chessboard." Ron exclaimed. "A huge chessboard."