At night, students dressed in various ghost costumes gathered in the auditorium for dinner, and today's dinner was different from usual, there was no meat or pasta, all candy and cakes of various colors, this was definitely a grand event in the hearts of every child, everyone kept stuffing candy into their mouths.

"There's a troll in the basement!" Suddenly, the door of the auditorium suddenly opened, and Quirrell ran in in with a panicked face and shouted, causing the originally lively atmosphere of the auditorium to freeze in an instant, and all the students' attention was focused on him.

"I think I should tell you." Quirrell stumbled as soon as he reached the center of the auditorium, falling to the ground and fainting.

Seeing this scene, the students' faces showed panicked looks.

Trolls are terrifying monsters that are twelve feet tall and weigh more than a ton, although their IQ can be described as stupid, but their strength is strong, they can easily break walls, and they have not weak magic resistance, many magic that is extremely offensive to ordinary people has little effect on them, coupled with the frequent unprovoked attacks on creatures encountered and the stench of smelly socks and public toilets that no one cleans, they are absolutely disgusting and feared creatures in the wizarding world.

Now that they learned that there was a troll in the school and that Quirrell, the professor, had fainted, the students who had been in the ivory tower were not afraid.

"Boom!"

At this moment, a rumbling sound of lightning and thunder came, and the auditorium was illuminated by lightning.

"Ahh

This lightning bolt directly frightened the students, and the screams continued to rise and fall, trying to run back to the dormitory, and the whole auditorium became a mess.

"Quiet! Everyone, stay calm! Dumbledore said loudly, his voice full of majesty, which made the panicked students suddenly quiet down, and everyone looked at Dumbledore.

"Next, ask the head of the academy dormitory to take the students back to the academy dormitory, and the teacher will follow me to the basement." , Dumbledore announced.

"Professor, I have one more thing to say." As soon as Dumbledore finished speaking, Ye Siyu next to him interrupted, then looked at the students who were about to leave and said, "If any student is willing to stay, they can follow us to deal with the trolls." ”

"Dealing with trolls? I don't want it. ”

"I want to go back to my dorm."

"I'm afraid."

Ye Siyu's words made the students lively again, and they all expressed their fear of Ye Siyu's proposal.

Dumbledore looked at Ye Siyu, he didn't understand what Ye Siyu meant, he knew that if he wasn't careful, he might get the student injured.

"It's a good opportunity to build up their self-confidence, and trolls aren't a tough magical creature to deal with, so they're not dangerous." , Ye Siyu explained.

When Dumbledore heard this, he didn't immediately agree, but he didn't object, but he was thinking about Ye Siyu's words.

"Professor Dumbledore, wouldn't that be bad?" Gryffindor Dean McGonagall frowned, she wasn't like a student injury.

"There will be no shortage of such things in the future." , Ye Siyu added.

Dumbledore nodded, he understood what Ye Siyu meant, this time the troll thing was definitely done by Voldemort, as long as Voldemort was not completely eliminated, then as Ye Siyu said, there would definitely be no less such a riot.

If they need to deal with it every time, the students may not know how to deal with it if the teacher is not there.

"If you have the courage to face the trolls, stay, and if you feel scared, follow your prefect back to the dormitory." , Dumbledore announced again.

As Dumbledore's words fell, the heads of the houses returned to their dorms with the students who were unwilling to deal with the trolls.

There were less than thirty students left in the originally crowded auditorium, and six students from the Elemental Academy were among them, as the person who was most familiar with Ye Siyu, she knew that Ye Siyu would make such a request, then she would definitely ensure their safety and there might be rewards for their good performance during the period.

"Alright, warriors, you must follow us in a moment, and you can't act on your own." Looking at the people who remained, Dumbledore admonished.

The students nodded in agreement, they weren't stupid and they knew what to do to be safe.

After some advice, in addition to the teacher who stayed behind to take care of Quirrell, Ye Siyu and Hermione and other teachers and students were led by Dumbledore to the direction of the basement to find traces of the trolls.

"Harry, Ron, look, Snape is gone." On the way, Hermione, who was walking in the forefront, pulled the clothes of the two and whispered.

When Harry and Ron heard this, they turned their gaze to the ranks of teachers in front of them.

Sure enough, Snape, who was still next to Ye Siyu at the banquet just now, was nowhere to be seen.

"I've finally found the proof!" , Hermione said excitedly, in her opinion, the reason why the trolls appeared in the school was definitely Snape's ghost, Harry and Ron on the side did not refute, they were exactly the same as Hermione thought.

"Then we'll tell the professor now." Ron began.

"No, the professor won't believe us without positive evidence." Hermione shook her head.

"So what are we going to do?" , Harry asked.

"Let's go find Snape." , Hermione suggested.

"Wouldn't the professor be upset then?" , Ron said a little timidly.

"As long as we find evidence, the professor won't blame us, if you're afraid, then I'll go with Harry, Harry, what do you think?" Hermione looked at Harry.

Harry nodded, as the target of Snape, he didn't have any affection for Snape, and now that he had a chance to find evidence that Snape was a mole, how could he miss it.

"Then I'll go too." Seeing that his two friends were gone, Ron was going to follow him.

The trio whispered a few words before slowly retreating to the back of the group, and when the group reached a corner, they broke away from the group and went in search of Snape.

It's just that they didn't know that the conversations and actions between them were watched by Ye Siyu not far away.

Ye Siyu knew very well how bold these little guys were, so he had been paying attention to their situation, although he knew that they would definitely do something, but he didn't expect them to be so bold that they would dare to leave the team to find Snape.

In this regard, Ye Siyu did not stop them, they should also suffer some social beatings.

Of course, Ye Siyu's spiritual power did not leave, and he kept watching them to prevent any accidents.

Suddenly, Ye Siyu was stunned, and he noticed that not far from Hermione and the others, an ugly guy with a huge wooden stick was walking around.

Didn't you say that the troll was in the basement, and there was one upstairs.

Ye Siyu frowned, and his spiritual power spread out, enveloping the school's school-run area.

Looking at this, he found something different from what he had reiterated in the past.

In the original plot, there was only one troll and only appeared in the basement, but now there are as many as seven monsters in the school, one in the basement, one on the fourth floor, and the other five in the four college dormitories.

Ye Siyu's eyes narrowed, and he instantly figured out why this change occurred, it was him.

Apparently Voldemort feared that his plan would fail due to the interference of his unknown stranger, so he put in more trolls to attract everyone's attention.

However, what Voldemort didn't know was that Ye Siyu was different from ordinary magicians, he had the ability to scan mental power.

"Professor, I need to get out of the way." , Ye Siyu said to Dumbledore.

"What's wrong?" , Dumbledore wondered, and the others also looked at Ye Siyu.

"There's not just one, there's seven." , Ye Siyu directly said what he found.

"Where?!" When Dumbledore and the others heard this, their faces suddenly changed.

"On the way to the dormitories of the various colleges." , Ye Siyu replied.

"What!" , Dumbledore's face became even more ugly.

"You deal with the troll in the basement, and I'll take care of the rest." , Ye Siyu spoke, and after speaking, his body trembled, and under the surprised eyes of everyone, Ye Siyu changed from one to two.

"There are two Leaf Professors!" , exclaimed one of the students who followed behind.

"Phantom?" , Charms professor Phellius Flitwick was surprised.

"No, this is the top of elemental magic, the clone technique." , Ye Siyu, the leader, replied.

Because of the different rules of the world, it is very difficult to use the doppelganger technique that can be easily used in the ordinary world in this world, even with Ye Siyu's strength, it can only be divided into two at most, and each one can only have one-tenth of Ye Siyu's strength at most, but it is enough to deal with low-level magical creatures such as trolls.

Under the mental power scan, it was found that the Gryffindor students had already encountered the trolls, and Ye Siyu stopped saying anything to Dumbledore and the others, and the main body and the clone disappeared directly under everyone's gaze.

All the students in the Gryffindor team were looking at the trolls with gray skin, pimple bodies, and moss-covered feet in front of them.

"It's all petrified!" , the head of the dormitory uses magic on the troll.

However, he was too nervous to say anything, which also greatly reduced the effect of his magic, and it had no effect at all, but instead attracted the attention of the troll, causing it to roar loudly at them, and a disgusting bad breath came over his face, making the student who had just eaten a lot sick to his stomach.

"No...... Don't panic! So many of us deal with it together! The dormitory room member soothed, but his somewhat stammering words did not give the students confidence, but only made them more alarmed.

"Roar!"

The troll didn't care whether the students panicked or not, it just wanted to smash all these little guys who provoked it now, and after yelling, it rushed towards the students, and its huge body made the ground shake with every step it took, which was extremely scary.

"Ahh

Seeing the troll rushing towards him, the students, who had barely managed to keep their composure, couldn't calm down anymore and screamed one after another.

"Incineration!"

At that moment, a flat voice rang out, and the burning device of the troll that had just run over was blazing, and then turned to ashes under the surprised gaze of the students, as if it had been a hallucination before.

"No one was hurt, right?" , The voice came again, and everyone turned their heads to look, only to find that the voice was made by Ye Siyu.

"Professor Ye!"

After seeing Ye Siyu, the panic on the faces of the students completely faded and they were completely relieved.

"Okay, let's go back to the dormitory if I'm not hurt." , Ye Siyu admonished, and then the figure disappeared to deal with other trolls.

……

On the fourth floor of Hogwarts School of Witchcraft and Wizardry, Hermione, Harry, and Ron cautiously walked through the school corridors, guarding themselves from being discovered by the teachers and keeping an eye out for the trolls roaming the school.

"Snape, are you really going to that chamber?" , Ron whispered.

"You can't go wrong." , Harry affirmed.

After his and Hermione's investigation, he knew that there was an important thing that Dumbledore had placed in the secret room on the fourth floor, and now that this kind of thing was happening in the school, Snape was missing again, and he couldn't think of any other possibility than the secret room.

As they spoke, they came to a corner, and if they turned around, they would reach the trapdoor where the chamber was located.

"Oops!"

As soon as they turned around, the trio bumped into something, causing them to fall to the ground.

Looking up, one can see that what made them the end of it was a troll several times taller than them.

"Ahh Hermione and Harry screamed in unison.

"Roar!"

The screams of the three made the troll very unhappy, and the huge stick immediately smashed down with a whistling sound to the three little ones who were too frightened to move, and the fear of death made the three burst out of unprecedented potential, and they crawled backwards, and the troll fell short.

It's just that the troll didn't stop because the stick missed, and still kept swinging the stick to smash it.

Smashing and smashing, the three of them were directly forced into a dead end, and there was no place to escape.

"Whew!"

The club fell again, swinging at the trio.

"It's all petrified!"

"Absolute zero!"

At this moment, two spells rang out, one on the left and one on the right.

In the next second, the giant monster that was still menacing just now froze in place and turned into an ice sculpture.

"It's good that I caught up." , Ye Siyu's figure appeared behind the three of them.

"Professor Ye! Thank you, if it weren't for you, we would ......", seeing Ye Siyu's arrival, the three little guys immediately hugged Ye Siyu's thighs, and they all thought they were going to die.

"You have one more person to thank besides me." , Ye Siyu said lightly, and at the same time looked at the other side of the troll.

The three little ones also looked at Ye Siyu's gaze, and at this look, the three of them were stunned.