{6,7}∩{7,8}＝7

As the rough broadcast ended, a faint bell sounded in my ears.

The next moment, the surrounding space began to distort. The walls, floor, ceiling... everything seemed to have life, wriggling like flesh and blood. The originally neat and bright library became dim and decayed, like a haunted house that had experienced a hundred years of wind and frost and a horrible past.

The air was filled with a pungent smell of mildew, the wooden floor beneath feet was completely rotten, black slime was faintly oozing out, and occasionally bugs would crawl past the corners of the wall, making rustling sounds that made one's scalp tingle.

Shen Qiting sat on the chair, watching the changes in front of her quietly and curiously. It was as if she had traveled to the gloomy environment of "Resident Evil 8", but she was slightly relieved.

She was a little worried at first. What if the vengeful spirit was going to attack the library directly? With her personality, she could never accept the library being destroyed in front of her. If the vengeful spirit really wanted to attack her directly and was likely to destroy the building and the books on the shelves, she would definitely kill the vengeful spirit without hesitation.

But it seems that this vengeful spirit is also a book lover. He even created a barrier on purpose to pull her in before "punishing" her.

Although the barrier is a bit too crude, I don't know if it can withstand her attack...

But it doesn't matter. Whether it's helping the library maintain its rules and regulations, or not taking any lives until now, only forcing students to study hard - it's said that it even gives extra lessons in dreams, no matter how you look at it, this is a good ghost!

Judging from Mr. Rui's teacher's mind, he might like this vengeful spirit very much. He might even want to keep it as a pet, helping him clean the blackboard, hand out test papers, write on the blackboard, etc...

But Zhizhi might be jealous. Recently, it likes to pester Teacher Rui more and more and act like a spoiled child. When Teacher Rui teaches a class, she will hang a vine from the sky to pat people's shoulders, which makes them jealous.

However, if she really brings the vengeful spirit back to the class, rather than developing the "foundation" according to Bai Luo's suggestion, it would be better to say that the feng shui of their class is more suitable for Pokémon... no, it's "Mythical Beast Palu".

Just as Shen Qiting was lost in her divergent thoughts, the library had completed its final transformation - the desk and chair she was sitting on had become a classroom-style desk, only more dilapidated. Black and red sticky blood oozed out from the desk, surging and turning into an A4-sized test paper, and even a pencil was placed next to it.

Chen Qiting thought: This vengeful ghost is quite considerate.

Not only did they not move the chair, but they also let her sit there. They even gave her a pencil for free, fearing that she would not have stationery to answer the questions. They even hung her schoolbag, which had been on the chair, next to the desk, instead of throwing it away.

He is a very good invigilator.

Shen Qiting lightly moved her right finger, and the magic power so weak that it was almost imperceptible flowed through her body, silently wrapping around Shen Qiting's body like a water film.

This is not a barrier used for defense, it simply blocks out smells.

Whether it was the dilapidated library in front of him or the disgusting smell floating in the air, everything was not real, but an "illusion" created by the vengeful spirit.

Unlike Zhizhi who simply used illusion to disguise herself and reduce her own troubles, the ghost's illusion was more like a "pitcher plant", which did not portray itself as harmless, sweet and amiable, but magnified its own frightening side.

It's a pity that the scene carefully prepared by the vengeful spirit could not cause any harm to Shen Qiting's spirit - although the vengeful spirit in front of him was a native product of the earth, the existence of "grudges" or "ghosts", no matter the form of attack or the principle, the Earth and Parnaki are exactly the same.

Illusions, mental magic, barriers, and a small number of offensive means are their most common hunting methods.

By creating a dramatic and seemingly extremely dangerous performance, the trapped people's mental, physical or magical power is constantly consumed, eroding their faith and courage until their psychological defenses are broken and they completely lose the ability to resist.

At this time, the vengeful spirit will reveal its true form from the darkness, catch its prey and feast on it.

As long as one has the ability to see through illusions, or has a strong will and the courage to sweep away all fears, the vengeful spirits will hardly be able to cause much harm to him - unless his own strength is too weak and he does not have the wisdom to make up for his weakness.

After all, if the vengeful spirit really possessed powerful means of attack, it would not choose such a time-consuming and laborious way of hunting. Instead, it would at most disguise itself with simple illusions like Zhizhi and directly subdue the enemy with force, which is simple, convenient and quick.

Therefore, in Parnaki, knights and warriors with firm wills, clergy with firm beliefs, or magicians of illusion and spirituality have always been the nemesis of resentment and ghosts.

But despite this, the existence of resentment and ghosts is still at the forefront of Parnaki. The most dangerous existence - the erosion on the spiritual level is the most hidden and the most difficult to resist.

As an astrologer, Shen Qiting was not threatened by the existence of Mirror Flower and Water Moon. As a "mobile library", she could easily use magic of light, illusion, spirit, barrier and other evil spirit nemesis. She was also well-informed, so this level of tricks was really not worth mentioning to her.

More importantly—her teacher is Rui Hang.

Anyone who dares to show fear in front of a political teacher will be punished by Teacher Rui’s socialist iron fist before the evil spirits.

"Beep—"

The radio floating above his head sounded again. Although the voice was still calm and rigid, it was filled with an indelible sense of gloom, which brought back Shen Qiting's thoughts that were running farther and farther away.

"The punishment test will begin now."

"The first question is the listening comprehension question."

"Please listen to the following conversation and choose the best option from the options A, B, C, and D given in the question. The conversation will only be read once and you will have thirty minutes to answer. "

"The listening test will start in five minutes."

And it looks quite presentable.

Normally, mutations caused by magic will show the characteristics they had before the mutation. For example, Zhizhi, because of the fusion of their magic, has multiple magical properties at the same time, but still retains the characteristics of being a vine: extremely fast growth and healing speed.

For example, the armor that houses the knight's obsession will still retain the owner's habits after mutation, wandering in the suburbs and constantly hunting monsters.

The vengeful spirit that was born from a middle school student's obsession with test papers, and that now resides in a library that is filled with all kinds of works, has become quite subtle in its attributes after the mutation.

Among all the variants, the most difficult ones are those related to words and pictures. They carry the strong emotions of the creators, and can also receive the emotions of readers when they watch. They often have their own independent space, and because words are used as a medium, they have extremely powerful magic.

The vengeful spirit that now bound her to the library for an "exam" might have merged with the latter's power.

If it's the latter... this is interesting. I don't know what methods this vengeful spirit who is said to have "tortured" many students to insanity has. If it's just an exam, it's too boring.

But since they are all mutants, they shouldn't really use a simple test to perfunctory themselves.

Thinking of this, Shen Qiting was full of anticipation. She lowered her head and began to read the contents of the test paper carefully.

"Question 1: Please find the murderer who killed Ellie."

"A: Dad B: Mom C: Neighbor D: Devil"

Well, it's barely normal, but it does have a bit of the feel of a horror game.

"Question 2: Fill in the blanks."

"There is a ghost ABCD at each of the four corners of the library, moving in the direction of the diagonal line, and the intersection point is your position E. Given ∠BAC = 90°, AB = 40 meters, AC = 30 meters. If DA = mDB + (1.5-m)DC, m is a constant, please calculate sin (∠DAB) = ____ before being caught by the ghost. ”

Shen Qiting: "..."

Barely, it has something to do with ghosts, at least there is some chase content.

Let’s look at the next question.

"Question 3: Please calculate the height of the sun from the ground by visually observing the angle between the sun and the ground. Warm reminder: The sun will continue to heat the temperature in the house, and the highest temperature can reach 100 degrees. Please hurry up and answer the question. "

Shen Qiting: "..."

Can she tear up the test paper now?

After all, the atmosphere is so gloomy, can't there be some truly thrilling content?

...Well, it is indeed quite thrilling to answer questions while being chased by ghosts.

But if the topic was like this, it was no wonder that the students were all unconscious and had no magic power left after returning to reality.

Chen Qiting couldn't help but imagine a gloomy and terrifying female ghost floating out from the wall. Her long straight black hair covered most of her face. She was wearing a red dragon and phoenix gown and a pair of worn red embroidered shoes. She stretched out a pair of purple hands with long nails and held your neck and pressed you against the wall. When you were extremely scared and afraid that you would be killed by her in the next second, you only heard the ghost say in a shrill or hoarse voice: "Please recite the whole "Dream of Wandering on Tianmu Mountain"."

It’s a bit outrageous when you think about it.

Especially when I finally thought I had passed all the tests and returned to the safe world, the ghost followed me into my dream and followed me to do the test papers all night long...

Hiss, a terrifying feeling surged up instantly! Even if it was her, without the help of magic, she would probably go crazy.

Just as Shen Qiting was complaining in her heart, the bell rang again, interrupting her silence.

The originally silent room suddenly heard the sound of something heavy falling to the ground, accompanied by screams of pain. It seemed as if someone was holding an axe, chopping at something that was both soft and hard.

I could hear the girl's suppressed sobs and a very small but desperate murmur.

"Mother..."

The scream suddenly disappeared, and the sound of the axe hitting finally stopped. What followed was the sound of footsteps accompanied by a heavy object, approaching Shen Qiting's direction dully.

"My sweetheart, please open the door for Daddy--"

"Knock, knock, knock--" there was a rapid knock on the door.

And up to this point, apart from Shen Qiting, no one else appeared in the entire library.

The girl's voice rang in my ears again. Her sobs turned into an uncontrollable scream out of fear.

"My sweetheart, are you playing games with Daddy? Why don't you open the door?"

The knocks on the door became more rapid as the conversation went on.

The girl couldn't hold back her tears any longer, her voice cracking: "You're not my father! You've been possessed by a demon!"

"Little Ellie, I'm your dad, the dad who loves you the most - dear little rabbit, open the door -"

The man's doting voice and little Ellie's crying suddenly stopped at this moment.

There was silence all around, and the wind that blew from nowhere made the old-fashioned chandelier above Shen Qiting's head sway. The faint dark yellow light flickered, making a "sizzling" sound, further exaggerating the eerie silence in the library.

But this tranquility was soon broken by a loud thunder, and the sound of raindrops followed the thunder. The biting coldness snaked up along the calves, like a poisonous snake with a venom coating, swimming slowly.

In an instant, the tightly closed door of the library was knocked loudly.

"Boom—boom—boom—"

...

Is this to let me experience the full story from the perspective of "Little Ellie"? Little Ellie said that her father was parasitized by the devil, which means that I must judge whether "he" is human or devil before "he" appears and kills me as Little Ellie.

This question is full of traps. If you are immersed in fear and rush to stop the "father" from entering the house, you may hastily choose "C" or "D" and ignore the subsequent development of the story.

The interest in Shen Qiting's eyes grew deeper and deeper, as if he was not in a barrier created by vengeful spirits, but a drama stage that he could watch up close and experience firsthand.

——Of course, it would be better if the conversation between little Ellie and the man was not entirely in English.

Shen Qiting finally understood why the protagonist was called "Aili" instead of "Xiaohong". Feeling is an English listening question.

This vengeful spirit is quite good at making things happen. In order to urge students to study, he can even design such a complete game process.

...

The knocking on the door became louder and louder, and the huge force caused the door to deform slightly.

As if feeling that this method was not enough to open the door, the "man" paused for a moment. There was a faint sound of iron scraping across the ground, followed by a full-strength chop.

Half of the axe blade penetrated the wooden door of the library and appeared in Shen Qiting's eyes.

Shen Qiting's eyes involuntarily turned cold - although she knew that this was just an illusion created by the vengeful spirit, Shen Qiting still had a sense of déjà vu that the other party was destroying the library in front of her.

I feel a bit unhappy!

The axe chopped a few more times, and the originally solid gate completely lost its protective function.

The man chuckled, his voice full of joy: “Oh, the door is open.”

Is it coming?

Shen Qiting's eyes suddenly widened, and for a moment he didn't care about the slight discomfort in his heart, and looked forward to the appearance of the murderer who was not sure whether he was a "human" or a "demon".

The door handle turned slowly, and the tightly closed door was pushed open with a bang.

"Chen Qiting, Chen Qiting, why don't you reply when I call or send you a message?" Bai Luo's voice was like a happy little firecracker, and he spat out a long string of words without taking a breath: "We walked around the school for most of the day before we finally found this library. You say the principal is really, hey, he built the library in such a remote place, doesn't he know that I have a poor sense of direction?"

The vengeful spirit hidden in the darkness: "......"

Shen Qiting: "..."

You have great timing!

Give me back my truth!