Dementors are one of the ugliest things in the world. They haunt the darkest and filthiest places, they live in decay and despair, they suck peace, hope and joy out of the air around them.

The most effective way to defend against Dementors is to use the Patronus Charm.

Patronus Charm: An ancient and mysterious spell that summons a magical Patronus that is a reflection of all the caster's most positive emotions.

According to the theory of yin and yang, dementors belong to yin attribute creatures, and the Patronus spell belongs to yang attribute spells, and the two sides are completely opposed. When the Dementors are strong, the Wizard will be affected by the Dementors and will not be able to cast the Patronus Charm unless the Wizard's heart is strong enough. And when the Patronus Charm is strong enough, it can banish a large group of Dementors.

Broadening it up, in the world of magic, the opposition between yin and yang, darkness and light, evil and justice exists, and both sides can destroy each other, depending on which side has the bigger fist.

Theoretically, pure yang and light magic can destroy Dementors.

It's just that on the European side, this kind of pure light attribute magic is very rare, and the only known ones are the Patronus Charm and the magic that saved Harry's life at Voldemort's hands.

According to the commonly used setting in the novel, the church that is supposed to light up the light attribute magic skill tree has not embarked on the path of magic at all in this world.

Zhang Xu asked the fat monk about this, and the fat monk said that there has always been no place for magic in the church, and only for a period of time, potions that can be used to treat believers can be said to be related to magic.

In the spirit of research, Zhang Xu trumpeted up his treasure bag to pack the collection of Dementors.

Offensive items such as exorcism charms used to clean up Peeves were not suitable for use on trains.

Although in many of the "Harry Potter" fanfiction I read in my last life, it is the standard plot for the protagonist to lash out at the Dementors on the train, and this plot is embarrassed to say that he wrote "Harry Potter" fanfiction without a chapter.

But Zhang Xu didn't dare to guarantee that after he killed the Dementor, the Dementor would immediately coax as in the novel. If the Dementors had chosen to confront him, the students on the train would have been in spite of it.

The Dementors are also violent agencies under the Ministry of Magic, and they usually serve as prison guards, and they can be pulled out for military use when necessary. It is similar to the integration of the armed police and the army in China. In China, it is the armed police who guard the prisons, and it is the armed police who hunt down dangerous prisoners. This is the same as the Dementors usually guard Azkaban, and they are responsible for hunting Sirius after he escapes from prison.

In contrast, the Aurors are more like cops.

If you really want to kill one or two Dementors and attack the armed forces of a regime, this is no joke, and if you put it on the American side, you will be shot and killed indiscriminately.

Zhang Xu was tinkering in the treasure bag, and it really made him discover a defensive prop that could be used in theory.

The god of the door, or the god of the guardians of the gates, is a type of painting that is pasted on the door during the Lunar New Year. As the god of folk belief guarding the door, people stick their statues on the door to drive away evil spirits, guard the house, keep peace, help utilitarianism, and descend auspiciousness, etc., and are the guardian gods of Chinese folk popularity. - Du Niang Encyclopedia

Next, we will focus on "driving away evil spirits and avoiding ghosts, guarding the house, and keeping peace".

In ancient China, there were often magical animals born in the dark in the wells, and they would run into ordinary people's houses, which would affect the normal life of the house owner, and at worst cause the house owner to get sick or even die.

This type of magical animal naturally belongs to the category of yin attributes.

Therefore, the monks at that time made all kinds of magic items to protect the safety of ordinary people's homes.

At first, runes were carved on the peach wood, so that the peach wood exuded yang attribute mana, so that those yin attribute magical creatures could not enter the house.

In Wang Anshi's "Yuan Ri", "Thousands of households always exchange new peaches for old charms." This is the kind of peach charm.

Later, there were skilled painters who used runes to paint, and then there were New Year paintings with the themes of Shen Tu and Yu Lei, Qin Shubao and Yu Chi Gong and Zhong Kui.

Soon after, stone beasts such as stone lions with the same function were also put on the market.

In ancient China, the families and sects of various scholars almost monopolized the market of peach charms, New Year paintings and stone beasts in the towns around the location.

Elsewhere, the sale of peach charms and New Year paintings was an important source of income for wandering Fangshi.

Just as Zhang Xu was about to take out something from the treasure bag, all the lights suddenly went out, and the people in the carriage were thrown into complete darkness.

"What's wrong?" Ron shouted.

"Ouch!" Hermione panted and said, "Ron, that's my foot!"

Hearing Hermione's words, the Wuling Hongguang S in Zhang Xu's mind was activated.

Then, the door of the carriage opened, and Neville fell into Harry's lap in agony.

Then Crook Hill experienced the Naville Summit.

Next was Ginny, who came to find Ron, who collided with Hermione, who was about to go out, and fell on Zhang Xu's leg in one fell swoop.

Well, this little girl is more developed than last year. Zhang Xu thought.

Just when everyone in the car was jumping, "Quiet!" Lupin said.

Then Lupin's wand glowed like a torch.

At this time, several other people reacted and took out their wands to cast spells, and the light in the carriage was restored for a while.

Taking advantage of this time, Zhang Xu helped Jinni, who had fallen into his lap, up and pressed her to the seat next to him.

At this time, the carriage door was opened, and Zhang Xu suddenly found that a lot of very unpleasant pictures appeared in his head.

At half past four in the afternoon of September 30, I was told that I would work overtime in the next seven days, and on the way home by bicycle from work, a man rushed out and lay in front of his car, spending more than one million resources, but he didn't fish out U47, and killed a chicken in Ximu Town......

Scenes full of negative energy filled Zhang Xu's mind.

Zhang Xu was shocked in his heart, and immediately cast a spell called "Mechanized Mind" on himself.

In an instant, all the emotions such as joy, anger, sorrow and joy in Zhang Xu's heart disappeared, and the whole person's thinking was running like a machine. At the same time, all the images in his mind disappeared.

Zhang Xu saw that Harry was trembling in his seat, and just as Harry was about to fall to the ground, he stepped forward to help Harry and pressed him to the seat.

Zhang Xu walked to the door of the carriage, looked at the dementors outside the door, then closed the door of the carriage, took out a picture of "Zhong Kui Catching Ghosts" and pasted it on the glass of the carriage door.

The patterns on Zhong Kui's clothes in "Zhong Kui's Ghost Hunting Picture" suddenly flashed with a burst of golden light, and the dementors outside the carriage seemed to see something terrible and quickly slid away.

At this moment, everyone in the carriage felt the warmth and returned to their bodies.

After a while, after discovering that no more Dementors were coming, Zhang Xu thoughtfully took down Zhong Kui's portrait while relieving his mechanical mind.

Zhang Xu turned around and saw Harry hugging a shivering Ginny, Lupin was smiling and handing a large piece of chocolate to the two of them, Ron was sulking, Hermione was snickering, and Neville was confused.

Then Zhang Xu walked out of the carriage and went to other carriages to see how the other friends were doing.

Along the way, Zhang Xu thought about some questions as he walked, and after discovering that the "Zhong Kui Ghost Hunting Map" had an effect on the Dementors, he had some ideas that needed to be verified, but he had to find one or two Dementors to make materials.

Thinking that Dumbledore was very disgusted with the Dementors wandering around Hogwarts, Zhang Xu considered whether to take the opportunity to sell a pair of stone lions from the evil town mansion to Hogwarts and place them on both sides of the castle gate, this picture is very beautiful.

Think of the Goblet of Fire next year, when the students from the other two schools come to Hogwarts, first passing by a specimen of a basilisk and then entering Hogwarts Castle between two stone lions.

However, considering that Gryffindor's emblem is a lion, if only the stone lion is released, it will cause the other three houses to be dissatisfied, and it is estimated that Dumbledore will not do this.

Do you want to sell two New Year's paintings of Shen Tu and Yu Lei, Qin Shubao and Yu Chigong or Zhong Kui and stick them on the gates of Hogwarts Castle? Or just make a picture of Dumbledore?

No matter how you look at it, this will make the Hogwarts art style even more weird.

In the end, Zhang Xu suddenly thought that if Hogwarts Castle really wanted to make something to ward off evil spirits, then the ghosts of Professor Binns, Nick, and Fat Friar in the castle would be cleared out of Hogwarts Castle.

Zhang Xu had no choice but to give up this idea.