The Magical Principles of Natural Philosophy at Hogwarts

When Erwin entered Gringotts again, he was pulling a small black suitcase.

This small box that has been cast with the No Trace Stretching Charm can pull out two lockers up to two meters high after opening, providing sixteen storage compartments, each of which can store items three times its actual capacity—no Wrong, stretch the space that has been stretched without trace again, Erwin likes this concept of matryoshka.

However, the price of the nesting doll is several times the price. This suitcase cost him 240 Galleons, which is almost twice what McGonagall said a normal student would spend a year. Erwin's overall assets directly dropped by [-]%. .

But it was a necessary investment, after all, how much he could bring to Hogwarts depended on the capacity of the suitcase.

Two thousand 750 four Galleons only took up half of a storage compartment, and Erwin couldn't feel the weight of these gold coins at all when he pulled the suitcase.

"Such a suitcase with such a large capacity will of course be cast with a weight reduction spell," Professor McGonagall told him, "No matter how many things you pack, the weight of the suitcase will not change."

Professor Stewart on the side wanted to pull out his beard. Such a box was enough to cause an earthquake in the entire physics world, but it was just a daily necessities for these wizards.

"Then how long can the traceless stretching spell and weight loss spell last for this box? I think if these two spells fail, it will definitely lead to very serious consequences." Erwin asked.

"It depends on the materials used to make it. They will mix a special potion and apply it in the interlayer to maintain the effect of the spell. Since your suitcase is worth more than 200 Galleons, it should last at least 50 years."

"Professor McGonagall," Hermione raised her hand to try to show her presence, "Why don't you apply the Untraceable Stretch Charm to smaller containers? For example, storage bags must be more convenient than suitcases, right?"

"Only a container with a stable structure can be cast with the No Trace Stretching Charm, so bags are not acceptable. In addition, the smaller the container, the more difficult it is to cast the spell."

"If I take out all these storage compartments, does that mean I can fit Hermione in?" Erwin fiddled with his suitcase, ignoring Miss Nutria's glare.

"No, the Ministry of Magic forbids the packing of living things into removable non-traceable expansion containers. This is a lesson learned from the lives of nearly fifty wizards in history."

"That is to say, the container fixed on the ground... Isn't this a building, that is, a building that is stretched without a trace is relatively safer?"

"Yes, you should have seen tents for sale in that store just now."

"What if the stable structure of the unmarked expansion container is broken? Like an ogre or a troll crushing my suitcase?"

"That will produce a mild explosion, and the contents of your box will be ejected. Well, Mr. Erwin Frost, if you are very interested in the Unseen Stretching Charm, you can do it in your senior year." Make it your own research direction. Now is the time to buy your wands."

Professor McGonagall ended the endless questions forcefully, apparently no matter how good his temper was, he couldn't resist Erwin's strong thirst for knowledge.She walked forward, completely unaware that the boy behind her was already thinking about the possibility of filling his suitcase with TNT and throwing it out.

The place where the wands were sold was a small, dilapidated storefront, and the gold lettering on the door had peeled off, "Ollivander: Excellent wand making since 382 BC." Hermione read it out word for word.

The shopkeeper was an old man with light gray eyes, "These should be the last two Muggle students, Minerva?" He greeted Professor McGonagall.

Professor McGonagall nodded, "Excuse me." She said politely.

The old man looked at Erwin and Hermione, "Which one of you will come first, children?"

Erwin silently took half a step back.

Ollivander began to measure the bewildered Hermione. The measurement items were complicated and strange. At the same time, the old man was still chatting with Professor McGonagall.

"That kid came to buy a wand the other day."

"Potter?"

Erwin's expression moved slightly. This was the boy's name he heard from the second mouth.

"Yes, holly, eleven inches long, and the interesting thing is that the phoenix tail feather in the core comes from the same phoenix as the Dark Lord's."

Professor McGonagall was silent for a while, "Maybe this is fate." She sighed.

Ollivander began to let Hermione try to use various wands, and she only needed to simply wave them to judge whether they were suitable, and soon had a satisfactory answer. A wand popped out when Hermione just held it Violet brilliance.

"Wonderful," said Ollivander delighted. "It looks like we're picking the wand, but it's the wand that's picking the wizard. It's a good wand, vine wood, dragon nerves, ten and a quarter." Three inches long, strong enough for a skilled and brave wizard, fine."

Miss Nutria was obviously very satisfied with such a compliment, with a smile on the corner of her mouth, but Erwin suspected that this might be the same as horoscope divination, and would not say anything ugly at all.

It was Erwin's turn, and he had reservations about the so-called choice of a wizard with a wand. After all, he had used the ebony wand left by Marduk many times, and he didn't feel any discomfort at all.

After all, the wand is just a tool. Erwin feels like a longbow subjectively, and the magic power is an arrow. Of course, shooting an arrow with a bow is easier, more accurate, and more powerful, but if your arm is strong enough, you can shoot it with your bare hands It is not impossible to throw the arrow.

One wand after another was sent to Erwin's hands, and then quickly taken away. Ollivander's face was solemn at first, and then the tip of his nose began to sweat.

"That's impossible," he said suddenly, "every wizard should have a wand that suits him."

"Are you saying you can't find a wand that suits me?" Erwin shrugged, "Shouldn't this be a normal phenomenon? You only have more than 1000 in stock here, and the number of samples is too small, and you seem to only get wands from dragons." , Phoenix and unicorn are used as materials, I think it is not only the things from these three creatures that are suitable for making wands."

"I'm sure you are suitable for dragon materials." Ollivander was a little angry, which was a well-founded anger after the professional field was questioned.

Trying a wand every half minute, this process was repeated for more than an hour, and everyone's expressions except Ollivander gradually became numb.

"Or, just choose a fairly suitable wand for him." Professor McGonagall said cautiously.

Erwin fully agrees with this, and staying any longer is nothing but continued torment, "Actually, you are not choosing the most suitable wand for a wizard, but choosing the one in your wand inventory that is most suitable for your customer," He tried to persuade Ollivander, "Since this is the case, there is no need to strictly require the wand to glow when it is in the hands of a wizard..."

Even 11-year-old Hermione could see that such persuasion really wasn't working.

Ollivander finally gave up, the old man's face was a little pale, "It seems that I really don't have a wand suitable for you here, kid." He announced, and at the same time handed over a long box, "Take this, Yue Osmanthus wood, dragon heart string, twelve inches, this is the best performance in your hands before."

"Very good, the same rod core as Professor Dumbledore." Professor McGonagall said,

Erwin took the box, "So, can you sell me the other wands that performed well in my hand?"

Both Ollivander and Professor McGonagall looked at him strangely.

"Is there any problem?" Erwin was a little puzzled, "Don't businessmen want customers to buy more things?"

"You can't cast a spell with two wands," Professor McGonagall reminded. "That won't make your spell twice as powerful or cast two spells."

"But there should be spells for wands, right?"

"Indeed." Professor McGonagall pondered for a moment, "In addition to your weapon, you can directly disarm the wizard who was hit."

"Obviously, then, the best way to deal with the Disarming Charm is to immediately draw out another wand."

Professor McGonagall was silent for a while, "Are you worried that you need to fight other wizards when you are studying at Hogwarts?"

"A little bit." Erwin shrugged, "In addition, the wooden wand is not strong, and the possibility of damage is not small, so I think a spare wand is necessary."

"My wand has been used for almost 60 years." Professor McGonagall was expressionless.

"This is obviously an isolated case." Erwin spoke plausibly, and Hermione looked at him with surprised eyes. In the past two days, she found that this boy was really different from ordinary people.

Ollivander stared at Erwin for a while, "Generally speaking, excellent wands are exclusive, and the owner will not be allowed to hold other wands. But since you don't have the most suitable wand, you can indeed ignore this restriction, then I There is no reason to reject you."

He gave Erwin three more boxes, "oak, dragon's nerve; walnut, also dragon's nerve; holly, dragon's heartstring. I don't charge you for these three wands, I just ask you to come to me every holiday , I will find a wand that suits you, and you must return these wands to me when the time comes."

Apparently he sees Erwin as his professional challenge.

"Is that so?" Erwin scratched his head, "Then I'd better pay."

Walking out of Ollivander's shop, Professor McGonagall looked at Irwin meaningfully, "I have a hunch that you will be one of the most troublesome students Hogwarts has ever seen."

"Thank you for the compliment."

The next step is to buy school uniforms. The clothes provided by Mrs. Malkin's robe shop have no magical effect, and Erwin is a little disappointed.Then there is the crucible, which is nothing special, making Erwin feel that it is better to go to an ordinary workshop to customize it, at least without spending precious Galleons.As soon as Lihen Bookstore entered the door, he could see a row of men with bright smiles on the bookshelves. Erwin didn't understand how narcissistic people would print their photos on the cover. At the same time, this also made him realize You shouldn't be able to buy more professional books in this store. ?

"Hogwarts' library collection is arguably the richest in Europe, so you only need to buy textbooks."

For the first time, Erwin felt that Professor McGonagall's voice was so pleasant. ,

There is only the last store that I have not been to, the Yila Owl Store.

"I suggest you buy an owl to deliver letters. Of course, the school will provide owls, but it's not as convenient as having one yourself."

Hermione discussed it with her parents, "I'm still not buying it." She finally made a decision.

Hermione's house was in the city, and to their neighbors, it was a bit strange for a girl to keep an owl as a pet.

Erwin has no concerns about this at all, "The main means of communication between wizards is owls?"

"Yes, a well-trained owl can help you deliver letters to anyone, as long as the other party doesn't take the initiative to hide itself."

"Then I must get one."

It's okay to use a public owl in school, but what about the holidays?Owls are likely his only means of contact with the wizarding world.

Facing a roomful of owl-shaped animals, Erwin chose the strongest horned owl without hesitation. The reason is simple. This guy is the biggest and at least has the strongest load-bearing capacity. He didn't notice The clerk looked hesitant to speak.

So far, everything on the list has been bought.

Before leaving the Leaky Cauldron, Professor McGonagall gave them two tickets, "September [-], King's Cross Station, the entrance is between platforms nine and ten. Just go there."

She made all the points that need attention.