Harry's position happened to be at the back of the crowd. Facing the huge mouth of the abyss that suddenly struck, Harry was a little dazed for a while.

　　 The foul smell sprayed on his face, making Harry almost nauseous. Just as desperation spread throughout his body, Ivan's voice suddenly rang in Harry's ears.

　　 "There are so many obstacles!"

　　 A series of invisible barriers blocked the three-headed dog's ferocious heads in mid-air, but the next second, the barrier constructed by Ivan's magical powers was torn and shattered by another big mouth with fangs!

　　 Fortunately, in just one second of effort, Harry had reflected in time and barely escaped.

　　 But after Ron yelled to run fast, the whole person had already swooped on the door, and after pulling hard with both hands a few times, he realized that the door had been locked.

　　 "Which **** locked the door!" Ron said desperately.

　　 Ivan, who temporarily restrained the three-headed dog with a coma spell and a petrification spell, couldn't help but roll his eyes. Didn't you lock the door yourself?

　　 Ron was panicked, even suspecting that he might die here, Hermione pushed it away and put the wand on the door lock.

　　 "Alaho Cave is open!"

　　 Hermione spelled the door and broke the door lock violently. A group of five people escaped as quickly as possible, and then closed the door back in time before the three-headed dog Norway came out.

　　嘭.. 嘭嘭!

After 　　 was far away, listening to the faintly banging and roaring in the distance, the few people who had escaped from the dead were relieved, especially Ivan who was caught in somehow.

　　 When he was pinning the three-headed dog Norway, Ivan found that his magic level was too low and its effect was limited. When the coma curse was applied, it would affect the actions of the three-headed dog at all.

　　If Hermione opens the door later, he might get a lunch box. After all, in such a small space, there is not even a place to hide.

　　 This also made Ivan deeply understand his weakness. It may be easy to deal with a first-grade wizard like Malfoy, but he doesn't even have the ability to struggle in the face of real danger.

　　 "That monster won't hit the door and run out, right?" Ron glanced at the door that hadn't stopped behind him, then complained again.

　　 "No, this should be a special door, otherwise it would have been broken." Ivan explained.

　　 "How could Professor Dumbledore keep such a monster in the castle?" Harry was also a little frightened. He had never thought that he would meet such a terrifying thing at Hogwarts, and he would almost be eaten by it!

　　Hermione reminded her angrily.

　　 "I think you should remember that when you first entered school, Dumbledore told us that we shouldn't come here. If we didn't come out in the middle of the night in violation of school regulations, we wouldn't rush into this place in a panic!"

　　 Maybe it was because she had just escaped from the dead, Hermione's tone was sharper than usual.

　　 Harry and Ron knew when they heard that Hermione was going to talk about it again, and Neville almost cried.

Who would have thought that after her vent, Hermione did not intend to sue. Instead, she revealed the fact that she saw a trapdoor under the three-headed dog before, and she suspected that the three-headed dog was guarding something. Guess.

　　 But before leaving, Hermione still warned Harry and the others that no matter what was there, it had nothing to do with them. This should be something Professor Dumbledore had to consider!

　　Hermione's attitude made Harry and the others unpredictable, but fortunately, Hermione would probably not tell Professor McGonagall about their violation of school rules tonight.

"I didn't expect Malfoy to be so insidious. He must have told Filch what we were in the trophy showroom!" Ron was still a bit angry when he returned to the bedroom, threatening to beat Malfoy tomorrow. .

　　 "Ivan, I knew we should have listened to you." Harry said embarrassedly, after all, Ivan had already mentioned this possibility to them in the afternoon.

"Forget it." Ivan waved his hand and said that he didn't care. After all, he had never expected Harry and Ron to stay in the dormitory without the temptation. It was just his luck to hit him halfway. .

　　 "By the way, Ivan, why were you in the corridor just now?" Harry asked curiously.

　　 "I haven't come to you yet." Ivan said casually. He can't always say that he sneaked into the forbidden book zone to read in the middle of the night, right?

Harry and the others became even more ashamed, but before this emotion persisted for a few minutes, they were thrown aside by a few people, and they discussed the trapdoor guarded by the three-headed dog, guessing what was hidden inside. ...Finally, Harry told about the fact that he had taken out a package from Gringotts with Hagrid before school started.

　　 Ivan was not involved. The challenge task just activated was enough for him to have a headache. He had no interest in interfering with Dumbledore's layout.

　　 The only thing to be thankful for is that there is still some time before Halloween, when the monsters are infested, and he still has some time to prepare.

　　...

　　 In the next week or two, Ivan worked hard to improve his strength, while the rest of the time was frantically searching for books about trolls in the library.

　　 "Detailed Explanation of Common Magical Creatures"... "Guide to the Domestication of Dangerous Monsters"... "On the possibility of hybridization between giants and giants"...

　　 Even the "Walk with Giant Monsters" was turned over by Ivan. U U Reading com

　　Yes, the author of this book is Guidro Lockhart, who will replace Kino in the next semester to teach the Defense Against the Dark Arts class.

　　Although Ivan knew Lockhart was a liar who could only forget the curse, this did not hinder the authenticity and professionalism of the content of the book, which is why he could find it in the Hogwarts library.

　　 To be honest, after seeing Lockhart’s iconic smile with white teeth on the cover, Ivan didn’t want to open it.

But who made the contents of the first few books unreliable? The "Detailed Explanation of Common Magical Creatures" only mentions that giant monsters have no medicinal value, and there is nothing delicious from the brain to the torso after being put in the pot. ...

　　 The description of trolls in the "Guide to the Taming of Dangerous Monsters" is that wizards can usually use more powerful power to make them succumb..

　　 Isn't this TM nonsense?

　　 If he has the strength to defeat the trolls, what else would he do here to flip the book?

　　 The book "On the Possibility of Hybridization between Giants and Giants" even made Ivan's eyes hot with an academic approach with both illustrations and texts.

　　Instead, it is a biographical method in "Walking with Giant Monsters", which gives a detailed introduction to the habits and weaknesses of the Giant Monster.

　　 For example, trolls usually have low IQs, have a large appetite, and eat everything, so if you want to deal with it, placing bait is a more correct choice. Trolls have a high probability of eating the bait.

There is also the giant monster’s small bean-like head and huge body, which makes the overall stability weak. If you use a powerful spell to hit the giant monster’s leg, it may break the balance and knock the giant monster down. A few more steps before being eaten...

　　 Finally, the head of the troll itself is also a weakness, much more fragile than other parts of the body. If it is hit by gravity, it is likely to go into a coma directly.