"The secret of the Dark Lord?" Sirius was surprised. He suddenly realized that Regulus' death might have something to do with this, so he hurriedly asked.

　　 "What secret, did Regulus tell you?"

　　 "Master Regulus didn't tell Kreacher." The old house elf shook his head. "Kreacher only knew that after that the Dark Lord would ask Master Regulus for a house elf."

　　 "It seems to be related to this locket!" Lupin said affirmatively. Regulus is willing to destroy this thing with his life, which shows that this is very important.

　　 Ivan understands that Regulus should be referring to the mystery of Voldemort's immortality-Horcrux!

　　 From this, it can be inferred that there must be a record of Horcruxes in the Black family's library.

　　 Regulus probably had a little impression after reading related books a few years ago, and then he happened to be there when Voldemort killed people and made the Horcrux, or Voldemort showed up in other places.

　　 In short, Regulus had some guesses in his heart, so he went back to the library to look through the books, looking for more information.

　　 Thinking of this, Ivan turned to look at Kreacher and asked. "Kreacher, do you remember that Regulus read those books?"

　　The house elf shook his head again. The pile of books that Master Regulus had read in the past few days was higher than it, and it has been more than ten years since it can't remember it clearly.

　　 "Don't we know if we go directly to the library to find it?" Lupin suggested that they only need to do what Regulus once did.

　　 "That's right! But you have to be prepared, there may be a lot of books there!" Sirius said.

many? How much can there be?

　　 Ivan really didn't have a concept in his mind. He had read several books in the library, and no matter how much he could compare to Hogwarts?

　　 But when Sirius took them into the underground library, everyone was shocked.

　　 "There are too many books here, too?" Ivan looked around and couldn't help but stunned.

　　 The entire library is like a square, rows of bookshelves are neatly arranged, and you can't see the end at a glance.

　　 Just because it hasn't been taken care of for a long time, it is covered with dust, and some close bookshelves are even connected with spider webs.

　　 "This is all the books that Black has accumulated for thousands of years!" Sirius explained with a smile, and there was some pride in the words. I am afraid that no family in England has more books than the Black family.

　　 "But if we were to find one by one, when would we find it?" Harry asked a very embarrassing question.

　　 Sirius’s smile stuck to his face.

　　 Fortunately, although Kreacher does not remember every book Regulus has read, he still has some impression of the area where Regulus once stayed, which directly narrowed the scope of the search.

　　 After determining the approximate range, everyone split up to search.

　　 Ivan found a bookshelf casually, scanned the name of each book, knew that he was related to Horcrux, and only needed to find books related to soul and advanced dark magic.

　　 But Ivan is also a little helpless. He knows everything, but he has to pretend to be ignorant. If it weren't for his good acting skills, I'm afraid he would have revealed the bottom.

　　 I can take the opportunity to bring the Horcrux thing to the table, so as not to have to lie every time I face this problem.

　　 Ivan scanned the collection of books in the bookshelf, pulled out a few books from time to time and opened them, and found that there were no records of Horcruxes and put them back.

　　 Just walked all the way to the end, Ivan unexpectedly saw that a magic book was not put back in the bookshelf, but just leaned against the corner of the bookshelf.

　　 There is some dust on the writing, and I can only vaguely see the picture on the cover and a few intermittent words.

　　 Ivan couldn't help but feel a little familiar. After picking up the book with his hands, the touch proved this point even more. The cover feels different from other books, a bit like touching the skin.

　　 "Huh~" Ivan gently blew off the dust on it, and the cover of the book gradually appeared, and it read-"Cutting-edge Black Magic Decryption"!

　　 Looking at the title of the book on the cover, Ivan's pupils shrink slightly.

　　 He hasn't forgotten that when he was in the first grade, he found exactly the same book in Hogwarts' forbidden area.

　　 At that time, my own strength was not enough. I couldn't crack the magic above. I was busy looking for "The Origin of Blood", so I didn't have time to check it.

　　I waited until the second grade. Ivan thought he could break the protection. When watching "The Decryption of Cutting Edge Black Magic", the book disappeared. He rummaged through the entire restricted book area and couldn't find it. There is a high probability that Dumbledore hid it, but I didn't expect that there was a copy here!

　　 But that's right. As the oldest wizard family in the British magical world, the Black family mostly prefers dark wizards. It is normal to have such a high-end dark magic collection.

　　 Regulus probably also learned the mystery of Horcrux through this book.

Ivan recalled the protective mechanism he encountered when he opened the book, and then gently touched the cover of the book with his hand, sensing the movement of the magic power ~lightnovelpub.net~ and found it in a few seconds. Where the node is located.

　　 "The curse stops!" Ivan put his wand on the node and input magic power. The title text on the cover slowly brightened, and then gradually dimmed after a while.

　　 Soon, Ivan felt that the book in his hand trembled as if it had a life, and he opened it automatically.

　　The difference is that this time there was no black mist or human face, and there was no scream that seemed to hit the soul.

　　 Ivan curled up the corners of his mouth, and then began to open the contents of the book.

　　 However, after turning over a few pages, Ivan's face became very serious, and only a chill came to his heart.

　　 Vicious curses, cruel sacrifices, self-harming black magic... The content recorded in the books is creepy.

　　 In summary, it is harming others and self...

　　 After Ivan finished half of the book, only this idea was left in his mind. At the same time, he also understood why the mediocre Pettigrew Peter could blow up a street with a thunderbolt explosion.

　　 Peter Pettigrew uses a black magic that relies on self-harm to amplify the power of the spell. The more painful he is, the more damage he suffers, and the stronger the spell bursts out!

　　 This is just a finger as a price, what if it is the whole arm or a leg?

　　 Ivan can’t imagine how much the power of magic will increase,

　　 Of course, it is not a good thing that the power of a spell is too strong. Once the caster can't control it, the magic will backfire the caster.

　　There are countless sorcerers who have died because of this. Basically every few years, you can hear someone killed or injured by their own magic...