The Magical Principles of Natural Philosophy at Hogwarts

The next Friday, Erwin showed Flitwick his already masterful cleaning spell.

"Awesome." Flitwick applauded.

"It's time to give me extra points, Professor." Erwin said bluntly.

"Okay, the Cleansing Curse is also a fourth-year spell. It deserves encouragement. Five points from Gryffindor."

"not enough."

"Then how much do you want?" Flitwick was surprised.

"Fifteen points."

"That won't work. A single bonus point for non-major events cannot exceed ten points."

"What about this? Here comes the water glass!" Erwin shouted, and the water glass on Flitwick's table immediately came into his hand.

In fact, he didn't need to recite the spell at all, or even use a wand, but it was still necessary to pretend.

"Flying Curse, that's great." Flitwick smacked his lips, "Okay, okay, fifteen points for Gryffindor."

Erwin was satisfied and returned to the common room, "because Neville has made up for the points he lost." He said to Hermione: "Now you have no reason to condemn me anymore. And if Neville continues

If he goes to Potions class, Snape will definitely keep finding excuses to deduct points from him, so overall it’s us who make the profit.”

Miss Nutria gave him a roll of her eyes.

After rebuilding his confidence, Neville's performance was extremely unexpected. He originally performed mediocre in the Transfiguration class and the Charms class, but suddenly he became one of the best students. He could only learn new spells at a slow speed.

Second to Hermione.

This is not surprising, one of the key elements in releasing magic is will and belief, and this is more obvious when using lower-level spells. And Neville is by no means a child without talent.

But in the eyes of others, it was really unbelievable. Even Professor McGonagall couldn't help but be shaken. Maybe it was really a good thing for Neville not to take Snape's class.

Erwin spends half a day every week helping Neville practice potion preparation. The simple camp on the outskirts of the shabby area is not limited to this role. Erwin can also practice some spells that are not very convenient for public disclosure, such as illusions.

Body curse.

Due to the high consumption of magic power, Erwin had to drink a cup of tea mixed with the Fountain of Power every fifteen minutes of practice. As a result, his stomach was full of water almost every day, and he even had to vomit it out, which was very uncomfortable.

After overcoming many difficulties, Erwin finally successfully used the Disillusionment Curse for the first time after the 217th attempt, and after the 325th practice, he was able to recite the spell and cast it successfully successfully. The reason for this

The reason for such an accurate count is that each practice is equivalent to burning a galleon.

This was truly a feat. A twelve-year-old child actually learned an Auror-specific spell. Erwin must have broken the record.

But it is not enough to master the Illusion Charm. It must be paired with a silent spell that can eliminate sounds, a concealment spell that conceals smells, and an anti-detection spell that blocks ordinary detection methods. The flaw of pure optical invisibility is too obvious, and four spells are needed

Only by using them at the same time can the real stealth effect be achieved.

Fortunately, the magic power consumption of the next three spells is not as outrageous as the Disguise Curse, but the difficulty is not low. It requires the villain to spend a lot of time practicing, and he has not been able to do anything else recently.

October has almost passed, and Hogwarts is about to usher in Halloween. Erwin finds it very strange, because Halloween is actually a festival with a strong religious atmosphere, and the history of magic has said that most Muggle religions

In fact, they are just wizards' toys.

Maybe wizards celebrate Halloween just because they want a reason to have fun and celebrate.

The decoration of the auditorium on Halloween was very atmospheric, with hundreds of jack-o-lanterns floating in the air, and dense bats. The dinner and subsequent Halloween celebrations would last until about nine o'clock, and Erwin was not interested, so he ate

Two steaks and we'll go back to Gryffindor Tower.

Sitting in the armchair in the common room, he picked up a book. Before he had read a few pages, Erwin heard a noise. The door to the common room opened, and almost all the Gryffindor students rushed in.

, many junior students looked panicked.

The lounge suddenly became very crowded, and Erwin found Neville with great difficulty, "What happened?"

"Professor Quirrell said there was a troll in the basement classroom," Neville said.

"Troll?" Erwin recalled the description in "Fantastic Beasts and Where to Find Them". The dangers of this creature are mainly reflected in its tyrannical physical strength and skin with high magic resistance, but its extremely low IQ. Thank you in the book

Dynamic pictures, Erwin has a relatively complete understanding of the troll even though he has never seen it with his own eyes.

"How could a giant monster enter the castle silently if it can't even cross the lake outside the castle?" Erwin pondered for a while, "Maybe Professor Quirrell wanted to use this giant monster as a teaching material, but accidentally lost it.

Control over it?”

Although this is quite outrageous, at least it makes sense.

Neville thought for a moment, then looked at Erwin with admiration, "I think it's the situation you mentioned. By the way, when I came back, I saw Harry and Ron walking in the opposite direction, and they didn't come back.

.”

"Do these two people want to challenge the giant monster?" Erwin asked curiously.

As expected of the Boy-Who-Lived, he is indeed brave and a born Gryffindor.

"Probably not." Neville seemed to suddenly think of something, "Parvati!" He asked like a brown-skinned girl who looked Indian: "Is Hermione back?"

"No, I haven't seen her since the afternoon,"

Neville took a breath, "Harry and Ron should have gone to find Hermione." He said firmly.

"What's the specific situation?" Erwin frowned.

"There was a big conflict between Hermione and Ron in Charms class today." Neville kept the story as short as possible. "Hermione cried and then disappeared all afternoon. She may not know about the trolls yet.

.”

"That's it..." Erwin thought for a while, and then said decisively: "Then I have to go out."

He had promised Professor Stewart that he would take care of Hermione.

If killing is not the goal, the danger of creatures like trolls is actually very limited. And Erwin has basically mastered the four stealth spells now. If he is careful, he should be able to avoid being discovered by anyone.

Taking all things into consideration, Erwin felt that he could take the risk.

After hearing that Erwin wanted to go out, Neville's first thought was not about violating school rules. "I'll go with you," he said without hesitation.

Erwin smiled, "It would be too easy for two people to be discovered if they act together. I can just go by myself. You should quickly tell Prefect Percy about this situation and ask him to find a way to inform the professors."

Neville no longer insisted and nodded vigorously.

Walking out of the common room, Erwin avoided the Fat Lady's sight, took out his wand and chanted four spells in a row, entering into true stealth.

There were almost no people on the road from Gryffindor Tower to the main building of the castle, not even a ghost could be seen. Erwin walked down the stairs and suddenly met Professor McGonagall with a serious face.

He stopped immediately, and Professor McGonagall hurried past him without any intention of stopping.

Very good, even if the professors didn't use advanced detection spells, they wouldn't be able to find Erwin in hiding.

Continuing to walk down, when he turned around the corridor, he suddenly smelled a faint stench, and then he could hear the scream of a girl.

It must be Hermione!

Erwin quickened his pace and saw the broken walls and door. This was originally the women's restroom. He could see the huge body of the troll inside, but there was a tall old man standing outside the door, holding up a wand.

It's Dumbledore!

Erwin's footsteps came to an abrupt stop. Since the Headmaster of Hogwarts is here, Hermione's safety does not have to worry at all. Dumbledore is recognized as the most powerful wizard in Britain.

But what is he doing?

Erwin slowly approached and found that the troll was fighting two boys, none other than Ron and Harry. Normal first-year students at Hogwarts would not learn any spells that could hurt the troll, but used two

It was a joke that a human child had the physical strength to fight a giant monster. The monster was a head taller than Hagrid, and it could crush the two boys into pulp with just one sweep of its arms that were like giant trees.

If Dumbledore hadn't been here.

The old principal pointed his wand at the giant monster, and the huge monster seemed to have suddenly suffered from severe arthritis. His movements became extremely slow. He roared angrily, but he was helpless against the two boys.

The young and naive Harry and Ron didn't feel anything unusual at all. They worked hard and focused to fight the troll, including tapping the water pipe to attract its attention and poking their noses with their wands. They didn't even notice Dumbledore

At this time, Ron finally realized that his wand could play a role more than a wooden stick. He waved his wand and chanted the spell he had just tried to use for the first time in the morning, "Yingadim Leviosa"

!”

The thick wooden stick in the giant monster's hand suddenly flew up, and then accurately hit its head. The thick-headed monster was knocked unconscious like this. It is unimaginable that a height difference of less than two meters could actually hit the wooden stick.

With such amazing power.

The giant monster shook twice and fell heavily to the ground.

Harry and Ron gasped frantically, "Okay, Ron," Harry said, "What a powerful levitating spell."

Ron smiled stupidly. He clearly refused to let the feathers fly in the morning, but now he could defeat a giant monster with a levitating spell - he didn't think there was any problem with this.

Several professors finally appeared, and it was impossible for them not to notice the movement. Erwin felt that it was a bit outrageous, and the professors' movements were too slow. The troll was not an invisible or fast creature.

The space inside Hogwarts Castle is not very large, shouldn’t it be discovered first?

Unless... Erwin subconsciously looked at Dumbledore.

The principal still had a kind smile on his face, "These children will be left to you. Take care of their precious courage, not to mention my help." He winked at Professor McGonagall, obviously disapproving.

He planned to show up in person. When leaving, he glanced towards Erwin intentionally or unintentionally, which made the latter's heart skip a beat.

It was discovered. Erwin wouldn't take any chances.

It is certainly reasonable that Britain's strongest wizard can see through his stealth, but Erwin is not sure whether his identity has been known to the principal, after all, the disguise has not been revealed.

Perhaps Dumbledore would have thought it was a curious upperclassman?

With some trepidation, Erwin quietly backed away and left. Professor McGonagall's angry voice could be faintly heard behind him.

In the end, none of the three children received any substantial punishment.

The next day in Charms class, Ron, who had become friends with Hermione, waved his wand vigorously at the feathers in front of him, "Wingardium Leviosa! Wingardium Leviosa!" he said over and over again.

He shouted everywhere and finally got angry.

However, the feather remained motionless and weighed as much as a thousand pieces.

"How could this happen?" Ron looked confused and sighed, covering his head and throwing it on the table, "I obviously used it yesterday..."