Who let this Dementor into Hogwarts!

Chapter 536 "Shut up, Sam Winchester"

"Quiet down (chewing) -- You've never seen anything like this before (chewing) --"

Cohen pressed his hand down in the air, signaling the group of students, who were pale with fright, to calm down.

"Silver Knife—Vampire—!"

"Dementor!"

"No—it's a ghost!"

Cohen swallowed the last piece of strawberry cake, then felt for the hard thing on the back of his head.

It's a silver dagger—who would use a silver dagger to kill a Dementor...?

puff-

In front of a group of wide-eyed people, Cohen pulled the dagger out of the back of his own head.

"Children, what's happening—Merlin's beard!" Slughorn rushed over upon hearing the commotion, and upon lifting the curtain, he saw Cohen holding a dagger stained with black blood.

“Someone is trying to murder me, Professor,” Cohen said, then brandished the silver knife in his hand.

As expected of silver, it wasn't corroded by the liquid curse.

"Murder?" Slughorn was taken aback for a moment, but a few seconds later he reacted and rushed to Cohen, going around to check on Cohen's injuries—

Cohen had a deep wound on the back of his head, from which some dark liquid was oozing.

"Quick, child, don't close your eyes—I'll take you to the hospital—" Slughorn frantically rummaged through his pockets, then suddenly realized the healing potion wasn't on him. He frantically pulled out his wand and conjured a small bottle. "Drink some medicine first, drink some first..."

“Actually, there’s no need to waste the potion…” Cohen tilted his head to avoid the potion that Slughorn was trying to force down his throat.

The wound on the back of Cohen's head was healing rapidly, and the oozing liquid cursed blood was evaporating at an extremely fast pace.
"Don't be silly, child, you've got a hole in the back of your head—"

Slughorn said anxiously, wanting to hold Cohen down and pour the recovery potion into Cohen's mouth, but because he recognized that what was flowing from the back of Cohen's head was something containing a curse, he was hesitant to touch Cohen's head.

"Cohen?!" Neville finally squeezed through the crowd, looking at Cohen in alarm. "What happened to you? Did someone attack you?"

However, compared to Slughorn, Neville was a bit bolder, reaching directly at Cohen, who still had the liquid curse exposed on his body.

So, to avoid any accidents, when Neville tried to pull Cohen to the infirmary, Cohen flinched—

"Wait a minute, Neville, almost done—almost done—see, it's all right now."

Cohen prevented Neville from touching the still-unevaporated liquid curse clinging to him. After feeling the hole in the back of his head disappear, Cohen tilted his head and showed it to him.

"He's a vampire! The wound is gone!" shouted the man who had called Cohen a vampire.

“Shut up, Sam Winchester,” Cohen said lazily, then his gaze swept over the entire area—

Because of the professor's presence, almost all the students gathered behind Slughorn to watch the show, except for one person who was leaving—Cohen saw his soul moving toward the door.

However, before Cohen could make a move, Slughorn reacted and immediately waved his wand toward the ceiling.

"Click——"

A lock clicked shut, and now no one could get out. "The killer is in the room—children, gather around me, be careful…" Slughorn gathered everyone in the center, then cast a few protective spells before going to Cohen and asking, "Are you really alright, Cohen?"

“Dementors aren’t afraid of silver knives, Professor.” Cohen raised his eyebrows. “The killer is over there.”

Cohen pointed to a location.

Slughorn pulled back the curtain and went through. A short while later, he returned, holding a student in his hand.

He was the first Asian student to speak to Cohen.

"I...I really don't know..." Yang said, confused and terrified. "I'm sorry—I really..."

“Sorry, kid, we have to go to the principal’s office… Cohen, are you sure you don’t need to go to the school clinic for a check-up?” Slughorn said to Yang, then asked Cohen with some concern, “Why don’t you drink this recovery potion first, and then we’ll go to the principal’s office?”
-
In Dumbledore's office.

"An attack?" Dumbledore looked at them calmly, his gaze mainly focused on Yang.

“I really don’t know—I only remember going to the restroom this afternoon…” Yang said nervously, “and then I ended up here, with several identical knives in my pocket…”

"It's a good thing you didn't use your hand to stab him," Cohen said, raising an eyebrow. "Otherwise, you would have died on the spot."

Yang gasped, looking at Cohen with terrified eyes, thinking Cohen was going to seek revenge on him...

"I'm sorry, I really didn't—"

“Horace, can you take this child to Poppy?” Dumbledore said. “He has been put under the Imperius Curse and needs some recovery.”

“Okay, okay…” Slughorn nodded nervously, and as he led Yang to the door, he suddenly turned back and said, “Albus, I think…”

“Perhaps we can talk about this later, Horace,” Dumbledore said. “I know that what happened tonight has been rather chilling.”

Slughorn left.

“What about me? I need some compensation too.” Cohen held out his hand. “I was murdered.”

“A silver knife,” Dumbledore sighed. “Anyone who knows you knows it won’t do you any good.”

"Then I'll tell my mom—"

“Thirty points,” Dumbledore said, as if conceding. “Let’s skip the lightening-up part, Cohen. Of course, I must apologize to you; I didn’t expect him to start making his move in the first week, even at school, and with you as his target…”

“I chose the least likely target.” Cohen plopped down in the armchair that Dumbledore had conjured up. “The most useless method—of course, it might be slightly more useful if I had vampire blood in my veins…”

“I think it’s time for Severus to speak with him,” Dumbledore said, his brows furrowed. “Perhaps this mission drove him to despair, which is why he chose this method…”

“You can make the arrangements, but this news definitely can't be kept secret,” Cohen said. “I'd better tell Edward and Rose beforehand, in case he comes knocking—”

"Dumbledore!"

With a whoosh, the fireplace in Dumbledore's office burst into flames, and Edward hurried out from the green fire.

"I've heard of Cohen—Cohen?"

(End of this chapter)