People are in Hogwarts, What the hell is the flood system?

Seeing the information refreshed on the system's light screen, Rhine glanced again at the feather duster in his hand.

Alright, so I have the Demon-Slaying Sword in hand, huh?

Then he could finally be sure how he was supposed to slay demons and exorcise evil.

Immediately, Rhine stepped into the restricted section.

The words on the system's light screen instantly turned a vivid red, like dripping blood, warning Rhine of the danger ahead.

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[Warning! There is a snake demon ahead, as fast as lightning, capable of poisoning immortals and gods, retreat immediately!]

Rhine was startled and on guard, but then he discovered that it was a magic book standing up on the bookshelf in front of him, with the title "Walking with Snakes: Nineteen Snake Transformation Techniques" on the cover.

This magic book was indeed wriggling like a snake, and the bookmark inside was hissing and spitting.

If an ordinary first-year student came here, they would probably be terrified.

But in front of Rhine, this book was simply trying to be cute.

He lightly reached out his hand, and the magic book seemed to sense some fatal threat, immediately lying down and pretending to be dead.

Rhine grinned.

"Yes, that's right, be good."

"Watch me slay demons and exorcise evil."

In the next moment, Rhine flipped through the pages while carefully dusting the cover and pages with the feather duster.

Only after he had dusted the book until it was spotless did Rhine take it out of the restricted section.

The system seemed to have narrowly escaped death, and the information that popped up seemed relieved.

[You fought fiercely with the snake demon for a long time. You were originally no match for the snake demon, but fortunately, the snake demon had been imprisoned in the Demon Cave for a long time, and you were holding the Demon-Slaying Sword of the Chan Sect, which was clearly effective against it.]

[After a fierce battle, you finally managed to kill it narrowly, barely escaping with your life.]

Madam Pince, seeing the book in Rhine's hand outside the restricted section, covered her mouth and let out a joyful cry in a suppressed voice.

"'Walking with Snakes: Nineteen Snake Transformation Techniques'? Merlin be praised, this book hasn't been cleaned in one hundred and twenty-three years according to the cleaning records, because it always likes to burrow into nooks and crannies like a snake."

"Let me see… Good heavens, you actually cleaned it so thoroughly, without using cleaning magic? Perfect!"

"I was worried that you wouldn't be able to deal with these books, but now it seems that you are perfectly capable."

"If you really help me clean the restricted section, Rhine Snow, I will repay you with everything I have."

[The guarding immortal is very satisfied with the snake demon corpse you brought, clean and decisive, a fatal blow]

[He originally thought that a Chan Sect disciple like you, young and focused on cultivation, would certainly have no combat experience, and even if you held the Demon-Slaying Sword, you would probably be no match for the demons.]

[Now it seems that your combat ability is indeed extraordinary.]

[The guarding immortal invites you to help him sweep the Demon Cave, promising a generous reward after the task is completed]

[System Warning: The host's cultivation is too shallow. It was already fortunate to have narrowly escaped death at the hands of the snake demon. The depths of the Demon Cave are filled with demons, each one more powerful than the snake demon. Please act according to your ability and stop in time!]

Rhine ignored the system's warning and gave Madam Pince a smile.

"Slaying demons and exorcising evil… Ah, no, maintaining the cleanliness of books is something every Hogwarts student should do."

"Otherwise, if one book after another is damaged, what will future students read?"

Immediately, he picked up the feather duster again and began sweeping through the restricted section.

[Warning! There is a Golden Haired Hǒu ahead, whose roar shatters the heavens and the earth, and whose blood energy soars to the sky.]

[The host's physical body will be instantly annihilated, escape immediately!]

A moment later, Rhine was holding a restricted book similar to Hagrid's textbook on magical creatures in the original story, looking disgusted, and shoved the feather duster into the book's mouth, giving it a thorough cleaning.

[You fought fiercely with the Golden Haired Hǒu, seized the opportunity to stab the Demon-Slaying Sword into the monster's mouth, and fortunately killed it.]

[The commotion of your battle has attracted the attention of multiple demons]

[The Blood Demon and the Soul-Devouring Demon are coming towards you. They are eager to vent their anger of being imprisoned on the Chan Sect disciple, host, escape quickly!]

Rhine looked at a blood-soaked book and another book on a nearby bookshelf that was screaming miserably.

When those two books sensed Rhine's gaze, the oozing blood was immediately sucked back, the screams stopped abruptly, and they tried hard to pretend to be normal.

Rhine quickly walked over and poked at them with the feather duster.

"Come, come, who was dripping red ink just now? Be good and let me brush you."

"And the one who was screaming, open your mouth. Weren't you screaming happily just now? Now scream again for me!"

Several hours passed, and the stack of restricted books beside Rhine was already as tall as several people.

He estimated that the number had exceeded one hundred.

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Rhine finally breathed a sigh of relief, finally enough for the first-tier reward from Madam Pince.

Cleaning purely with a feather duster without using magic made Rhine feel a little tired.

But these cleaned books were just a drop in the bucket in the restricted section. Really wanting to clean the entire place would definitely be a huge project.

However, Rhine thought to himself that he only needed to clean ten thousand books to get the Wan Yao Golden Pill recipe.

As for the reward promised by Madam Pince, Rhine didn't care.

Immediately, Rhine steadily held up the stack of restricted books and walked out of the restricted section.

Madam Pince almost fainted with excitement when she saw this scene.

"Ah, heavens, you actually cleaned so many?"

"Look, this Biting Book, its teeth haven't been brushed in two hundred and sixteen years, and now they've been brushed clean."

"And this black magic book that bleeds, according to records, the librarian three hundred years ago gave it a cleaning."

"Merlin be praised, Rhine, you've cleaned a total of one hundred and two books for me, a century's worth of records, I can't thank you enough!"

"You are the most virtuous and book-loving little wizard I have ever met. You will definitely become a great existence in the future!"

[After several hours of fierce fighting, you escaped from the encirclement of demons in the Demon Cave and brought out one hundred and two demon corpses]

[The guarding immortal, seeing you covered in blood and the demon corpses lying everywhere, couldn't help but shed tears.]

[He looked up to the sky and shouted—I am not alone! From now on, there will be successors to the path of slaying demons and exorcising evil!]

[The guarding immortal asserted that this child's future is limitless, and he will surely become the mainstay of the Chan Sect and a pillar of righteousness!]

Rhine looked strange.

I just dusted a little, and now I'm going to become a pillar of righteousness?

But then, his attention focused on the reward.

[Your relationship with the guarding immortal has reached a nodding acquaintance.]

[You have received a talent reward—Reversal Magic Source!]