Dumbledore thought for a moment and said: "This involves a terrible dark wizard of the fifteenth century, Aixtis, who was the earliest known resident of Azkaban, when it was just an unknown island in the North Sea, blocked by hidden magic.

Although there has never been a shortage of dark wizards called "evil", Axtis' evil is rooted in his bones and has no sympathy for all living things. It is because he created the species of Dementor with cruel means."

Felix said in surprise: "Detectors were created by wizards? It's like a five-legged monster?" He didn't know at all that this was definitely a secret in the wizarding world.

"The five-legged monster is an unexpected product, but the dementor is not." Dumbledore shook his head. "It was not until Axtis died and the hidden magic failed to do that. But the dementors have become independent species, with only a dozen at the beginning, but they can breed and divide like fungi, while the conventional spells are almost ineffective."

Felix said in confusion: "If this were the case, their numbers should have been overflowing, but in fact they are sparse and used by the Ministry of Magic?"

Dumbledore explained: "The Ministry of Magic has more cooperative relationships with the dementors, and this creature seems to have a magical sense of grouping, and their numbers are always maintained within a certain range, but as long as they are reduced to a certain level, they will split on their own. Perhaps this is also a way of reproduction?"

Felix almost understood the way Dementor existed, and he couldn't help asking: "Besides the patron spell, what other spells are effective? I mean, can it completely kill Dementor?"

"It's hard, Felix, it's hard," Dumbledore said.

Felix wanted to continue asking questions, but Dumbledore was obviously reluctant to talk more, and their conversation quickly ended.

...

In the early morning, the little wizards woke up from bed and knew nothing about what happened a few hours ago.

Harry, Ron and Hermione were sitting at the long Gryffindor table and having breakfast. From time to time, several owls flew in, and Hermione looked out of the auditorium with anticipation.

"Are you waiting for a letter?" Ron asked.

"Oh, I bought a book from Lihen Bookstore through the Owl Shed." Hermione said absent-mindedly, "It seems that it will not arrive today."

Seeing Harry a little depressed, Ron suggested: "When you wait for your training to finish on the weekend, we can go to Hager as a guest. To be honest, the three-headed dogs that have become smaller are very cute. I agree with Hager's aesthetic for the first time..."

Harry was also moved, and he said excitedly, "Maybe it's late, Wood should be training until dark."

Ron shrugged, "I hope Hagrid won't drive us out again." At the beginning of school, they wore an invisible cloak to visit him at night, but Hagrid personally took them back to the castle and warned them that they could only go to find him during the day.

Hermione was about to express her opinion, but Professor McGonagall suddenly walked into the auditorium and she shouted: "Potter, come here!"

Harry put down his knife and fork in a daze. Did he make any mistakes? Ron and Hermione looked at each other and followed them together.

"Weasley and Granger...you're here too." Professor McGonagall did not drive away the uninvited two people. She looked at Harry with a serious expression: "Where is your glass? It's the one targeting Black!"

Harry carefully pulled out the pocket mirror from his pocket, and it was lying quietly in his hands, and Professor McGonagall was clearly relieved.

"What happened, Professor?" Hermione asked in a low voice.

"It shouldn't be hiding it from you anymore, Potter," said Professor McGonagall. "I know you might be shocked, but I have to tell you, Black."

"I know everything," Harry said angrily, "I know he is chasing me, which is his reason for escaping from Azkaban! I also know that he has a good relationship with my father, even his best man, he, he still." Harry couldn't continue to say it anymore. When he thought of the word godfather, he felt that he was insulted, including his dead parents.

Professor McGonagall seemed very surprised and stared at him, "I understand, okay, I thought."

"Then you should understand why I asked you to carry this spectator with you, which can protect you." She pursed her lips, "Just earlier today, before dawn, the spectator in the castle sounded an alarm."

Harry stammered, "Yes, is it the spectator in my hand? But it has been in my pocket, and there is nothing unusual?"

Ron also showed a shocked expression on his face. He covered his pocket tightly and whispered: "Don't move around, spots!"

Professor McGonagall repeatedly clenched his fists, as if he was hesitating whether to say it out. In order to keep it a secret, only Felix, Dumbledore and her three knew that the spectator was not one but three, but now it is no longer a secret.

Hermione, who was standing beside him, replied: "Professor McGonagall, I have seen it from Professor Hepp. There are three of the same glasses, and the other two should be arranged in other places? I guess it is at the entrance of the castle..."

Professor McGonagall sighed, "Well, Granger, as you said...one is placed on the front door and the other is placed on the back door."

Harry said, not sure whether he was glad or disappointed, “So, he once wandered around the gates of the castle?”

"It should be like this," said Professor McGonagall. "The professors all got up early and searched the castle urgently, but found nothing. No strangers were found in the castle's portraits, which means..."

"He knew it was exposed and ran away early." Harry said.

"Yes, Porter," said Professor McGonagall. "Since you know everything, I believe you are mentally prepared and some activities are not suitable."

"Hogsmeade" Harry cried out, his heart suddenly raising his throat.

Hogsmeade is a village composed of wizards. After obtaining permission from parents or other guardians, young wizards in grades and above can visit here for a specific few days each school year.

He also discussed this with Ron last night. He told Ron that he had not obtained Uncle Fennon's signature, and Ron suggested that he try it with Professor McGonagall.

Now it seems that it may be in ruins.

Professor McGonagall glanced at him and said with a serious expression: "Of course you can't go to Hogsmeade, I'm talking about Quidditch. To be honest, it's too dangerous to let you train, even if there are other players, it's not enough for Black to deal with it alone."

"Professor McGonagall," Harry couldn't help but shout, "What does this have to do with my training?"

"Of course it's relevant. Black is likely to be hidden in Hogsmeade or deep in the Forbidden Forest." Professor McGonagall gave a bolt from the blue. "Quidditch Stadium is too far from the castle. What's really wrong, we can't even rescue it."

"But, but..." Harry said with some confusion. He had begun this year's training. Three times a week, Wood said to him ambitiously to win his second Quidditch Cup as his graduation gift.

Other players also seemed confident because of last year's victory.

But now the first game has not yet begun, is the trophy going to be a bubble?

Harry suddenly thought of something, and he said anxiously: "Professor McGonagall, what if any professor looks at us, such as Mrs. Huoqi..."

Professor McGonagall pursed his lips and refused to speak.

"Please..." Harry begged.

"Okay," Professor McGonagall relaxed, "I will ask Mrs. Huoqi to supervise your training. I will return to the castle immediately before dark. I will pass when I have time."
Chapter completed!