"Five points to Gryffindor: two for Ron and three for Hermione."
Sherlock was never stingy with awarding points to students who answered questions correctly, nor did he favour the Ravenclaw House he had once belonged to. He was far fairer than a certain unnamed old bat.
"As Ron and Hermione said, the three Unforgivable Curses are the Imperius Curse, the Cruciatus Curse, and the Killing Curse."
"All three spells are subject to magical law. If any Unforgivable Curse is cast on a person, the wizard who uses it will be sentenced to life imprisonment in Azkaban."
"To be honest, I'm not proficient in the true Dark Arts, namely the Unforgivable Curses. So far, I haven't even successfully cast a single one."
"However, someone who has come to the castle this year has a profound understanding of this subject and has even personally used all three spells on people."
At that moment, a student sitting below asked hesitantly without raising their hand.
"Pr-Professor, didn't you say that anyone who uses an Unforgivable Curse on another person has to be locked up in Azkaban for life?"
Sherlock regarded the student solemnly. Rather than criticising the Hufflepuff for failing to follow classroom etiquette, he nodded.
"An excellent question, Williamson. The reason he was able to use the Unforgivable Curses on people without being arrested was that, during that period, the Ministry of Magic made an exception and lifted the restrictions on Aurors using these curses to deal with dangerous enemies in the wizarding world."
"Although the restrictions were reinstated soon afterwards, by then, the number of Dark wizards who had died at his hands from the Killing Curse had already exceeded three."
All the students instinctively held their breath. Everyone knew who Sherlock was talking about.
There was only one Auror who had arrived at Hogwarts this year: Mad-Eye Moody, Alastor Moody!
"I originally wanted to invite him to explain or demonstrate the curses to you personally, but that old man had no intention of dealing with a bunch of youngsters in the classroom."
"Fortunately, my relationship with him isn't bad, so I managed to obtain something from him that will allow you to experience these Unforgivable Curses for yourselves."
As he spoke, Sherlock took a transparent glass bottle from his robe pocket. Inside, several silvery threads swayed slowly, resembling seaweed floating in water.
The contents of the bottle were beyond the students' knowledge. Even Hermione, who had read more books than anyone else, couldn't identify them.
However, this wasn't the main focus of Sherlock's lesson. After placing the glass bottle on the podium, he drew his wand and gently waved it towards the classroom doors and windows. All the curtains closed, plunging the entire classroom into darkness.
At the same time, he used his wand as a pen to write a series of silver symbols on all four walls. Nobody could understand what they meant, except Hermione, who barely recognised them as ancient Runes.
In fact, if Harry had paid closer attention when visiting Dumbledore's office, he would have realised that the Runes Sherlock was drawing were identical to the patterns on the surface of the stone basin Dumbledore kept in his cabinet.
These symbols, which Sherlock had copied from the Pensieve treasured by Dumbledore, could temporarily give the entire classroom the ability to display memories.(TN: Interesting.)
After inscribing all the Runes, Sherlock opened the glass bottle, allowing the silvery threads of light to float out like fish swimming through water.
At the same time, all the Rune symbols engraved on the walls began to glow with a soft silver light!
"Don't make a sound. Watch the images that appear before you carefully."
Sherlock's voice rang out through the classroom, calming the students' nervous hearts.
Soon, everyone felt a wave of dizziness. When it passed, the classroom had disappeared, replaced by an entirely different scene.
They found themselves inside a dilapidated old house. Dust covered the battered floor, while a pile of furniture that could only be described as junk had been stacked against one side.
The surroundings were dreadful, but nobody paid much attention to them. Everyone's attention was fixed on the wizard tied up with hemp rope directly in front of them.
The wizard looked ferocious. His face was bruised and swollen, and there wasn't a single unmarked spot to be seen.
Despite being restrained and tortured, he continued to shout defiantly and arrogantly.
"Keep going! Is that all you've got? Haven't you got anything else? Pathetic! Your teammates won't last much longer. They'll tell us everything they know, and then they'll be disposed of like pests! Let's see who has more guts!"
The students stared in astonishment at the wizard, who remained so arrogant despite his condition. Just as they were trying to comprehend what they were witnessing, an irritable voice suddenly sounded from behind them.
"Let me try again, Captain! We're running out of time! We really can't afford to wait any longer!"
The students turned towards the voice and discovered three wizards crouching near the wall beside the door. All three wore the standard robes of Aurors from the Ministry of Magic.
They immediately recognised Moody among them. He was already wearing his magical eye and using his prosthetic limb, though he didn't look as old as he would later. A cigarette dangled from his mouth, and his expression was grim.
The Auror urging him on was a young man who looked anxious and restless. He seemed unable to wait any longer, and whenever he glanced at the captured wizard, his expression revealed unmistakable disgust and hatred.
Moody appeared to have made up his mind. He spat out the cigarette butt and spoke in a hoarse voice.
"Even if the Ministry has relaxed the restrictions on using Unforgivable Curses, that doesn't mean you youngsters should be the ones handling such matters!"
"But..."
The young Auror tried to say something more, but Moody glared fiercely at him.
"Shut up! I'm not dead yet! What are you trying to do, steal my thunder?"
Having finished speaking, he drew his wand and limped forward, passing through the students who seemed so out of place in this scene. Despite his limp, every step he took was remarkably steady.
Several students instinctively stepped aside to make way for Moody, but he paid them no attention. He passed through them like a ghost and finally stopped in front of the captured wizard.