Although William does not know how to curse the fire and cannot control the devil's flames, since this is a level, Dumbledore must have left the key to pass the level.

Several people walked to the table, Hermione grabbed a roll of parchment placed next to the bottle, and she read:

Danger is in front of you, safety is in the back. Two of us can help you. Drink them down, one leads you forward, and the other sends you back to your original place.

Two are filled with nettle wine, and three are killers, waiting in line. Choose unless you hope to be delayed here forever.

We also provide four clues to help you choose: First, no matter how cunning the poison is, they are actually standing on the left side of Nettle Wine;

Second, the contents in the bottles at the left and right ends are different. If you want to move forward, neither of them will work for you; third, you will find that the bottles are of different sizes.

There is no death hidden in the giants and dwarfs; fourth, second on the left and second on the right, although the appearance is different, the taste is the same.

After listening to it, William smiled and said, "I don't know who gave a simple logical reasoning question."

"These potions are all configured by Professor Snape, and they should have been produced by him." Cedric lowered his head and glanced at the bottles.

Hermione also smiled, "Many of the greatest wizards do not have the slightest ability to reason, so they have to be trapped here forever, but this question is not too difficult."

William nodded. To be honest, Muggles are much better than wizards in this regard. Their subject education guarantees that they are often very logical.

"Then let's see who reasoned first?" Hermione suggested.

William used his wand to create a piece of parchment paper, held a quill and said with a smile: "You guys reason, I will leave some small gifts for Professor Snape."

William thought for a moment and quickly wrote on parchment:

Professor Snape and Professor Dumbledore each have a non-zero natural number, and it is known that the product of the two numbers is either 8 or 16.

Snape: "I don't know the number of Dumbledore."

Dumbledore: "I don't know Snape's numbers either."

Snape: "I still don't know."

Dumbledore: "I still don't know."

Snape: "I get it"

Dumbledore: "I know, too."

What are the numbers in their hands?

After William wrote it, he put it on the desktop. Hermione was the first to guess the answer to the question left by Snape.

She clapped her hands happily. "I know, this smallest bottle can help us through the black flames."

William picked up the inconspicuous little bottle and sniffed it carefully, and it was another potion I had never seen before.

Professor Snape is really hidden. He can even invent the potion that resists the devil's flames. It's terrible.

"Is such a small bottle enough for a few of us?" asked Cedric.

William used a deformity to create six straws, "If you drop a few drops per person, it's still enough."

William sucked a few drops with a straw and dripped them into his mouth. The smell was like ice and penetrated into his whole body.

Several people carefully sucked a few drops, and finally there was a small mouthful left in the bottle.

William left all the potions except nettle wine.

"This is a potion that can suppress the devil's flames. I want to study it." William said seriously, "try to find out the ingredients of the potion."

"Can this be studied?" Hermione said intrigued.

"Of course, you can do it. You only need to use Scarpin's appearance spell to analyze the ingredients of the potion, but this is quite complicated and it takes a long time to try." William explained.

"There are also these bottles of poison. Since they are configured by Professor Snape, they must be very toxic.

I'll also try to make an antidote, and you must know that according to Gobalott's third law... the antidote of mixed poison is greater than the sum of the antidotes of each individual ingredient.

We not only need to choose the antidote for each individual component, but also find additional components, which can transform various irrelevant components through nearly alchemy procedures..."

Everyone is listening to the Book of Heaven, because William is talking about the contents of the advanced potion textbook, which is already learned in the sixth grade.

Although Hermione couldn't understand, she still showed her interest, which seemed to sound interesting to this method.

After a while, William was the first to enter the devil flame, and saw the black flame licking his body, but he felt nothing.

In that moment, he could not see anything, and there was only a black flame in front of him. Then he came to the other side and entered the last room.

This is a spacious, beautiful circular room full of funny little sounds. On the table with long legs, there are many strange silverware, spinning, spraying out small waves of smoke.

The walls were hung with portraits of the old men and women, and they were all snoring gently in their respective frames.

But in fact, they are all laughing.

Hey, this room is so familiar.

"Well, isn't this the principal's office?!"

In September, William felt his hands and feet were cold and he turned around and was about to leave.

Dumbledore set up such a complex level to know who can travel at night?

This is fishing law enforcement!

All boring!

He was about to turn around and go back, but Cedric and the others were already rushing in.

Fred looked at the silverware on the table and laughed, "Is this the reward given to us after the pass?"

Rewards are a big deal!

William quickly asked him to shut up, and at the same time lowered his voice, "Go away... This is Dumbledore's office..."

The faces of the few people were stiff and they quickly turned around and wanted to leave.

"Since I'm here, will I chat for a while? I'm happy to have a heart-to-heart talk with the little wizards before going to bed to understand the students' psychological conditions.

I want to know more, why did they appear here if they were not lying in their bed at twelve in the morning?"

The office bedroom door was suddenly opened, and Dumbledore walked out in a furry purple nightgown with a nightcap tied with a small ball on his head.

In Dumbledore's arms, holding the Bobo Tea, it was looking at William with an innocent face and meowed weakly.

I actually came to the principal's bed to dance late at night!

William stood in front and smiled awkwardly, while Hermione hid behind him, trying to reduce her presence and not be discovered by the principal.

"I'll just say don't come!" If Dumbledore wasn't here, the girl would have shouted.

"Sit down." Dumbledore said kindly.

Six chairs appeared under everyone's butt.

"Drink some drink?" Dumbledore pondered for a moment: "It's better to have milk. A glass of milk before going to bed is good for the stomach."

Dumbledore waved his wand and six cups of steaming milk appeared on the table.

"Ah, Bobocha, you're here." William seemed to have suddenly seen his cat.

He gritted his teeth and said, "I thought you were missing, so I took them to find you late at night. I didn't expect you to be with the principal...ahhaha..."

Cedric and the others nodded quickly and smiled seriously, as if they agreed with William's statement.

Dumbledore smiled slightly and sat down on the chair.

"Then, you have violated at least a dozen school rules. How many points should I deduct from you?"

Dumbledore said happily.

...

...
Chapter completed!