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"No need, Sirius." Harry looked at Sirius in the mirror who was so nervous that his eyes were flushed, "I threw that book into the fireplace, so it's all right now!"

He was really worried about Sirius coming, whether he was still wanted by the Ministry of Magic, or he didn't want Sirius to find out that he was befriending a ghost, especially the latter, he was not ready to tell Sirius yet thing.His godfather would definitely not allow him to associate with Prince.

Harry pursed his lips bitterly, maybe he would stay at Hogwarts after graduation, so Sirius would have nothing to do with this matter!Who he associates with as an adult is beyond Sirius' control.But he still hoped that Sirius would like his friend, at least he would not object to them being together.

Sirius held the double-sided mirror tightly with both hands, his entire face was almost pressed against the mirror, carefully sizing up Harry, and almost went through to check for his godson to see if the black magic had caused him any harm .After a while, he moved away a little bit, probably because Harry's words had an effect, and he breathed a sigh of relief temporarily, "Oh! Thank Merlin! It's best if you can resist the temptation and burn it! I'm afraid of meeting you. Black magic that even fire can’t solve, in my opinion, you should stop going to the forbidden/book area, black magic is too evil, it’s not suitable for you.”

"Sirius, that's a book in the Restricted Section, and it must have been approved by the school and the Ministry of Magic to exist there." Harry retorted Sirius with what Remus told him, "And Defense Against the Dark Arts is Do I need to understand black magic to learn how to resist it? If I don’t understand it, how can I defend against it when I encounter it?”

"Indeed, if you have enough knowledge of Defense Against the Dark Arts, you will be able to resist and destroy the black magic book with the right method when you encounter it. Of course, the flame It is also a method, but it is your mistake, and in many cases, flames alone cannot solve the problem." Sirius said, "Based on the current situation, war is not far away from us, Harry, You really should train yourself a lot, although in my vision, we adults should help you solve these problems, you are still a child, you just need to stay and study at Hogwarts. But—” he sighed His tone and expression showed unconcealable fatigue, coupled with his long unkempt beard, he looked particularly decadent - it reminded Harry of Sirius after he escaped from Azkaban in the third year, when he was very thin It's almost out of shape, just like the sight of a Death Eater lunatic.

"It's not just me, there's a whole DA Association behind me, do you think if there's a real war, can we all be spared?" Harry looked into the eyes of the godfather on the double-sided mirror, "Although Remus came Succeeded Umbridge, but we didn't learn anything in the first half of the school year, let alone fighting Death Eaters, we might not even be able to pass the OWLs." He said sadly, "Siris, think about it What you will know when you graduate and when we graduate in the future, maybe our group of students will not be as good as you, and Principal Dumbledore will not want to see this!"

"Oh, Harry, I really didn't know that your Defense Against the Dark Arts class is so bad now." Sirius scratched his head, "I'm very glad that you have such a strong interest in learning, in fact, James often wore his clothes at night. Wearing an invisibility cloak to read books in the forbidden/book area——First of all, I want to declare that he didn’t intend to study black magic. After he copied the books in the forbidden/book area, the three of us will study how to curb these black magic together. I always think of a solution first! James’s talent is still more in Transfiguration. We are the best partners! What is the difference between me and him?” He smiled unconsciously in the memory Woke up, extraordinarily happy that Harry had only seen him when Sirius said he resembled his father.

They were really good friends, which is why Sirius was so miserable after his parents died that he went to Azkaban to spend the rest of his life.

Harry blinked, "Siris, you see that you all taught yourself Defense Against the Dark Arts when you were students, so why don't we continue this fine tradition? I think James will agree with this, since You said the establishment of the DA Association would make him proud."

"I'm really glad that you have become such an excellent person, just like James." Sirius burst into tears, "I will tell Remus to ask him to help you a lot, and you can go to him if you have any difficulties." Him! If you encounter trouble in the restricted/book area, you can trouble him! If there is something in the book that you don’t understand, that’s the purpose of the professor’s existence!" Sirius welcomed Harry to torture him with difficult problems Friend, "You can also use the double-sided mirror to contact me, we will be happy to help you, just don't study these things in private, black magic is quite dangerous, I think this incident can already explain the problem."

"So you're encouraging me to study the Dark Arts? Defense Against the Dark Arts, I mean?" Harry laughed.

"Yes, Defense Against the Dark Arts. When you understand the operation of black magic, then you can know its root weakness. Many black magics are actually not as evil as we imagined. Sometimes you have to use black magic to fight against black magic. But James doesn't quite agree with this matter." Sirius hesitated and said, "But in my opinion, as long as the method works, James just couldn't figure it out." His voice was low After leaving, his expression became lonely, "It would be great if I arrived at that time."

"Dark magic against dark magic?" Harry frowned.

"Yes, black magic is the most effective against black magic. Not all black magic requires sacrifice and will erode your soul. It depends on how you use them. Some are just lethal. This is like—like the Muggle gun ban," he thought for a long time and came up with a metaphor, which he knew Harry, who lived in the Muggle world, would understand, although he didn't make it Knowing what a gun is, "But you have to promise me that you have to discuss with Remus about the books in the restricted/book section--I'll give you a list of books, let me think about the books I have read Those books, I will list them for you tomorrow!"

"Oh, Sirius, you're so kind!" Harry smiled, and as for discussing it with Remus, of course he would!It's just that he's already 15 years old, so there's no need to tell Remus everything.

"It's very late now, have a good rest. I'll hand over the book list to Remus tomorrow, and you can just find him!" Sirius cut off the connection with the double-sided mirror after saying goodnight to his godson.

Well, now he found an excuse for Prince to study black magic.Harry leaned back on the pillow expressionlessly.

Not all black magic is evil, so all he has to do is look at Prince so his friends don't go astray - and best of all, they go researching black magic together!

Right, that is it!He then guided Prince to study the spell against black magic, and changed the study of black magic into the study of defense against the dark arts, so that Prince would not love black magic but love defense against the dark arts!No one will doubt that he is an evil ghost!A ghost good at Defense Against the Dark Arts must be a good ghost!

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Harry who forced himself