Hogwarts: The Savior's Strong Cousin

"Harry, you must be careful," Snape's voice was low and serious, "The power of dark magic is far stronger than you think. There is a bigger conspiracy behind the Mark of Malachis."

"Professor, what should I do?" Harry asked.

"You need to find an ancient magical book called the Darkhold," Snape replied, "It contains all the information about the Mark of Malachis. But be careful, the Darkhold itself is full of dangers."

Harry nodded, "Thank you, Professor. I'll be careful."

Snape's figure gradually disappeared in the darkness, and Harry knew that he had a greater responsibility on his shoulders. He must find the Dark Book, unlock the secret of the Mark of Malachis, and save Hogwarts from danger.

In the following days, Harry, Hermione and Ron traveled through every corner of Hogwarts, looking for clues to the Dark Book. They experienced countless dangers and challenges, but each time they strengthened their determination.

As time goes by, the influence of the Mark of Malachis becomes more and more obvious, the magical defense of Hogwarts gradually weakens, and the threats inside and outside the school are getting closer. At this time, Harry finally found the Dark Book in a forgotten basement. The book exudes a strange light, as if warning those who read it.

Harry carefully opened the pages of the book, while Hermione and Ron watched nervously. They knew that this book might be their only hope, but it might also bring greater danger.

The text in the book is ancient and obscure, but with the help of Hermione, they finally found a detailed description of the Mark of Malachis. To destroy the mark, they need to perform a complex and dangerous ritual, and also need a rare magic material-the Dragon Heart Core.

Time is running out, so Harry decides to go find the dragon's heart himself, while Hermione and Ron stay in Hogwarts to prepare for the ritual. Harry knows that this mission is full of unknown dangers, but he has no choice but to back down.

On a cold morning, Harry said goodbye to his friends and set out on a journey alone to find the dragon's heart core. He crossed the distant mountains and entered the mysterious Dragon Valley. There, he met the legendary fire dragon, a huge red creature with wisdom shining in its eyes.

Harry plucked up the courage to explain his purpose to the dragon. The dragon was silent for a while, and finally agreed to help him, but on the condition that Harry must complete a difficult trial to prove his courage and wisdom.

The trial was extremely difficult and Harry experienced countless life and death tests, but he always believed in his beliefs. In the end, he successfully passed the trial and obtained the Dragon Heart Core.

With the Dragon Heart, Harry returned to Hogwarts. At this time, the situation at the school had become very critical, and the power of the Malachis Mark almost destroyed all the protective barriers.

With the help of Hermione and Ron, Harry quickly began the ritual to destroy the mark. They chanted ancient spells, and the dragon's heart core emitted strong magical energy, which fought fiercely against the power of Malachis's mark.

Suddenly, the whole Hogwarts shook, as if the earth was roaring. The power of darkness and the power of light clashed fiercely in the air, and the magic light like lightning illuminated the entire night sky. Harry felt a huge energy surging from his body, as if the fate of the entire Hogwarts was weighing on his shoulders.

At this moment, a dazzling light shot up into the sky, and the Malachis mark gradually dissipated in the light, and finally disappeared. The entire Hogwarts returned to peace, and the magic defense barrier was stabilized again.

Harry, Hermione and Ron breathed a sigh of relief, knowing that the crisis had finally been resolved. But they also knew that the shadow of the dark magic had not completely disappeared, and there might be more challenges waiting for them in the future.

Harry Potter stood on the wall of Hogwarts, staring at the sky in the distance, his heart filled with mixed emotions. He knew that this victory was only temporary, and the shadow of dark magic was still lurking in the dark, waiting for the next attack. Harry felt that the responsibility on his shoulders was even heavier, and he had to work harder to protect Hogwarts and his friends.

Just as he was lost in thought, an owl flew from the sky and landed on his shoulder. Harry took the letter from the owl's leg and unfolded it. It was a call from Professor McGonagall.

"Harry, please come to my office immediately. There is something important to discuss." The letter was short and urgent.

Harry quickly left the wall and ran to Professor McGonagall's office. When he arrived, Professor McGonagall was waiting at the door, her face full of anxiety.

"Harry, there is something we must deal with immediately," said Professor McGonagall. "Dumbledore's portrait told me that there is an ancient magic book in the library that may help us better understand the origin and treatment of dark magic."

Harry nodded, a glimmer of hope in his heart. "Then let's go to the library now."

Professor McGonagall led Harry through the dark corridor and came to the entrance of the library. This is one of the most mysterious places in Hogwarts, where countless precious magic books and scrolls are kept. The stone statue guarding the door moved automatically, revealing the passage leading to the library.

The two walked into the library, which was filled with an ancient and mysterious atmosphere. Harry felt a chill coming over him, but he knew that he had to stay calm and focus on the task.

"We need to find the book called The Origin of Darkness," Professor McGonagall whispered, "It is recorded on the deepest bookshelf, but it may also be full of dangers."

Harry nodded and followed Professor McGonagall into the depths of the library. The bookshelves here were towering, and the books were piled up like mountains. Each book exuded a different magical aura. Harry felt a strong magical force flowing around him, as if the entire library had its own life.

"Harry, did you hear that?" Professor McGonagall suddenly stopped and asked in a low voice.

Harry listened carefully and heard a faint whisper, as if someone was whispering in the dark. He gripped his wand tightly and looked around cautiously.

"Yes, I heard that," Harry replied, "Be careful, Professor, we may not be alone."

As they continued to move forward, the whispers gradually faded, replaced by a sense of oppression, as if an invisible force was blocking their progress. Harry felt his heartbeat speed up and his palms sweat slightly, but he knew he had to hold on.

Finally, they came to the deepest row of bookshelves. The air here was extremely cold, and the books on the bookshelves seemed to emit a strange light. Professor McGonagall pointed to a high bookshelf, on which was a very old book.