A large hole had been broken in the cell wall of Nurmengard Castle.

Moonlight was pouring in, but it was not as bright as the faint blue light inside the house.

Grindelwald stared at the firebird outside the castle.

It was a very strange bird. Its body was silvery white, as bright and clear as the moonlight, and it looked like a guardian god. But its delicate head, slender neck feathers, back and wings were covered with deep blue flames, and the flames kept jumping. Its eyes were exactly the same as Grindelwald's.

"Go, bring my wand back, we still have a lot to do later." He said calmly.

The firebird flew across the dark night and flew away. Grindelwald took a few steps outside, and the air outside blew in. He approached the black wall and stood on the edge of the high tower of Nurmengard Castle.

In the distance, where the sky and the ground met, there was a transition from pure black to dark blue.

Grindelwald lowered his head and stared at his left hand.

The spell in his body was extremely stubborn and could not be solved in a short time, otherwise he would not have been trapped here for decades. Previously, he had used blue flames to burn most of the spells in his body, but there were still a few that remained and were difficult to

eradicate. Grindelwald could clearly sense that they were all over his body, bit by bit devouring the magic that he had finally recovered and was in control of. If he didn't do something, it wouldn't be long before they would grow again. The sky gradually brightened. He had to make a decision as soon as possible.

Grindelwald looked back at the corner of the cell. There was no need to hesitate. Now was the best opportunity. Dumbledore - or someone else, should have appeared to stop him as soon as he tried to break free, but there was no one.

Oh, he just destroyed the wall by the way. The magic on the wall had nothing to do with Dumbledore, but maybe the International Confederation of Wizards could get the news.

The magic in his body gathered in his left hand, and his body became empty. Then the tiny spells seemed to be attracted and poured into his left hand, gathering and merging along the way to become complete, but Grindelwald let it all happen.

Finally, the remaining fragments of the spell were kneaded together. They seemed to have life, flexibly and greedily chasing the magic that devoured his left hand. The spells sparkled and became more complete every minute and every second. At this moment, Grindelwald seemed to feel something - through the spell - he vaguely saw a blurry shadow.

The man seemed to have noticed something and raised his head. His face was blurry, but his pair of light blue eyes were impressive.

Grindelwald's heart sank. The last bit of hope was lost. He put on a cruel smile.

"Boom!"

The violent black fire burned violently, crackling, burning his flesh and blood while completely destroying the last spell. After doing all this, he was sweating and trembling all over.

But it was all worth it - new power appeared, and a brand new magic without spell pollution was born from the depths of his soul, perfectly merging with his body that was almost exhausted at this moment.

He was reborn.

...

Hogwarts.

Felix glanced out the window and blinked in confusion. He seemed to have seen old man Grindelwald just now. Was it an illusion? Or was it a new ability brought by the spell? But he was still a little short of fully mastering the spell... His heart sank. Would something go wrong?

Half an hour later, Felix appeared in Nurmengard Castle.

It was his first time here, and he was not used to the damp air and the smell of rotten straw. There was also a burnt smell in the air. He carefully examined the big hole in the wall, where a line of black writing appeared: Everything for the greater good.

He had a headache. After a while, a dozen figures fell from the sky outside the castle. Felix retreated into the darkness. He didn't want to meet these law enforcers for the time being. After leaving Nurmengard Castle, he went around several nearby towns, and the spell on his arm didn't respond at all.

Felix stared at his arm in a daze. Would this thing be useless?

He just got it.

When Felix returned to school, it was already completely bright. The school was no different from usual. Some early risers were eating at the dining table. He found Professor McGonagall, but she was even more excited when she saw him. Without saying a word, she dragged him to the staff lounge.

"Akinbad received a letter from an owl this morning, and then his face changed drastically. He left in a hurry without even having breakfast." She said first.

Felix asked thoughtfully, "Did he say why?"

"No. But his expression seemed very panicked. It must be something very important." Professor McGonagall guessed.

"Alas, Grindelwald escaped last night."

Professor McGonagall's eyes widened, and she seemed very excited.

"Felix...you mean, Gellert Grindelwald?" Her voice trembled a little, and Felix suddenly realized that she had also experienced Grindelwald's most active years and was very clear about his influence. Felix recounted the general process, including the information that Grindelwald disguised himself to teach at the school. Professor McGonagall was

breathing heavily throughout the whole process, her hands tightly grasping the clothes on her chest, and her body was shaking.

"I didn't expect it at all! He turned out to be Professor Bagshot, obviously..." She paused, her eyes flashing with memories, as if she had found evidence from her past interactions with Grindelwald, such as his superb magical knowledge and his hostile attitude towards Muggles.

Professor McGonagall tried to calm down, "Albus - why did you do this?"

"I think it's because of a prophecy." Felix said softly, he stretched out his hand to show her the picture of the anti-wizard parade, "A year ago, Grindelwald escaped from Nurmengard Castle and came to England. He got his own wand from Future World Company in Diagon Alley - the qualification review at that time was not as strict as it is now - and then, maybe he saw the recruitment information in the newspaper, so he asked to teach in the school for a year in exchange for the picture you see now."

"...The current president of the International Confederation of Wizards, that is, Abaginde, also knows about this. They sent people to check Grindelwald's physical condition last summer and confirmed that he was still bound by magic, and his magic power was polluted, and his strength was not as good as before. In the end, they agreed to this approach."

The actual situation is of course more complicated.

Felix still doesn't know whether Dumbledore's reason or emotion prevailed when he agreed to this condition, but in short, there is a new Defense Against the Dark Arts professor in the school.

According to Felix's judgment, Dumbledore may have been under a lot of pressure - I guess the people of the International Confederation of Wizards would not mind deceiving Grindelwald, finding out what he knows and then kicking him back to the cold, damp, dark prison. Grindelwald certainly knew this, so he found Dumbledore as a guarantee.

"Did something go wrong during the transfer process last night?" Professor McGonagall asked sharply.

"Yes, Dumbledore has a way to monitor Grindelwald's status, probably similar to a two-sided mirror..." Felix briefly explained the principle that the imprisonment magic and the monitoring key are of the same origin, "I guess when he improved this magic, he may not have thought of transferring the spell to other people, so there was a loophole. Of course, it's hard to say clearly. If Dumbledore hadn't had the key in his hand, Grindelwald might have escaped from prison in the first few years of his imprisonment..."

The process of transferring the spell key only cuts off the connection with Grindelwald, but it will not make the imprisonment magic invalid, so Felix's words are very credible.

"Okay, I roughly understand." Professor McGonagall slowly accepted this reality. She had once been thankful that the school had been safe and sound for a year, but she didn't expect that there would be a storm in the dark, and she herself had been working with the dark wizard Grindelwald for a year without realizing it. She even reported a lot to Dumbledore...

"So no one knows where Grindelwald is now?"

"I didn't find him in Nurmengard Castle, but," Felix hesitated, thinking of the handwriting he saw on the wall, and shook his head and said, "He won't be satisfied with hiding. I'm concerned about another problem-"

"What problem?" Professor McGonagall asked painfully, rubbing her forehead.

Felix threw two boxes of letters on her desk, "We should put these letters in different categories. To be honest, there are too many, and there are only two of us, so we can't ask for help."

"Why ask for help?" Professor McGonagall glanced at him sideways, put on square-framed glasses, and seemed to be ready to complete the work assigned by the previous headmaster conscientiously before officially becoming the headmaster.

Felix felt a little uneasy.

He was not sure whether these letters would come in handy, because Grindelwald probably guessed Dumbledore's death. The question was, would he expose the illusion that Dumbledore was still alive? This question had been lingering in his mind since he came out of Nurmengard Castle, and he did one thing for this - nearly one-fifth of the letters in the box were written to Grindelwald, and Felix kept these letters.

Then until noon, they were busy with this matter.

Grindelwald couldn't be found now, and he didn't know where he was hiding. Maybe he was recuperating. Felix had seen how weak Dumbledore's body was after the transfer spell. Grindelwald certainly couldn't be intact, and he even had to ask about the remaining strength of Dumbledore at this moment.

If it were him, Felix would definitely find a picturesque place to secretly cultivate his body. After a few years, he believed that his strength would be more mature, and time was on his side.

"Oh, by the way, Voldemort died last night. He had been surviving with some extremely evil black magic before, so he could only be imprisoned in secret. But all this came to an end last night. He is completely and forever dead."

In the interval between work, Felix calmly announced a heavy news.

...

In the school hospital, Felix said similar words to Harry.

After learning that Dumbledore's body was properly placed, Harry still felt suffocated. When he thought of Headmaster Dumbledore lying alone in the coffin, even his death itself became a secret, unknown to outsiders, he felt like a knife in his heart.

"He deserves a grand funeral, not buried in a corner in silence." Harry stared at the white sheets on the bed and said, there was a stain there. He thought of Regulus Black. Now everyone knows that Regulus once fought against the darkness alone, but how long will it take for someone to know the sacrifice Dumbledore made?

"What is happening now is what Dumbledore wants to see." Felix lowered his eyes and said.

After a while, they talked about other issues.

"Professor Hep - you mean that Bar Grindelwald regained consciousness during the transfer? How did he do it?" Harry asked in surprise.

"I will remember to ask this question next time I see him." Felix dragged his chin and said in confusion, staring at Valen putting a bunch of candies together to form a smiling face. Harry stared at the pattern listlessly, and then he suddenly had an idea and thought of Neville's mirror.

Although he and Hermione couldn't find the problem, maybe the professor could find the doubts from it?

He told the professor his guess, but the professor's reaction was mediocre.

"The mirror is broken, there is no doubt about it. Only a few of the dozen magic runes are correct, but the problem is that as long as there is an error, the mirror as a whole will not work. It can't even give an early warning..." Felix said, and his voice slowed down.

"Professor? Have you thought of anything?" Harry asked, holding his breath.

"If that's the case, then this is a very clever idea." Felix muttered, his eyes brightened, and he thought of a possibility - in fact, there are better ways, but none of them are as aboveboard as this - taking advantage of people's psychological blind spots.

The mirror in Neville's hand may have played a role.

It was not to remind Neville, but the hair belonging to Grindelwald that was put into the mirror was the key. This hair, together with the incomplete magic circuits, constituted the positioning part of another mirror.

Felix himself introduced seven different mirrors in class, one of which would issue an early warning when the mirror was close to the owner of the hair. This kind of tracing mirror can generally only be used as a toy for pranks, but it can also come in handy at times.

For example, when Sirius was still a fugitive, in order to prevent him from approaching the castle, Felix made three tracing mirrors with his hair hidden in them.

Maybe Grindelwald did the opposite. When the two mirrors are far away and exceed a certain distance, one of them will issue an early warning. Felix quickly simulated it in his mind and felt that he could do it.

Thinking deeply, the warning may not be a sound, but a vibration or some strong stimulation. Therefore, when Grindelwald was forced to leave Neville (in fact, away from Hogwarts Castle) beyond a certain distance, the mirror would automatically start to work.

The above is just Felix's momentary guess. He is not sure to what extent Grindelwald understands the ancient magic runes. Grindelwald has never shown his attainments in the field of ancient magic runes, but he has read ancient magic runes magazines and occasionally chatted with Felix about the contents above, but none of them involve magic techniques.

If Grindelwald had this idea since then, then his mind is quite terrible.

Grindelwald can of course use another student's hair to make a mirror, which may be more concealed, but there is no guarantee that Dumbledore or Felix will think of this aspect and conduct targeted inspections.

With limited information, Grindelwald chose the most conservative and what he thought was the safest option.

As it turned out, he succeeded. Felix checked his office, the items he carried with him, and the magic that might be attached to his skin, but he ignored the possibility that he had swallowed a peephole. The truth that even Felix didn't know was that his Stunning Spell was indeed strong enough. It was still unknown whether the peephole itself could wake up Grindelwald from a coma. At least it would definitely be later than he expected. However, the stinging spells cast by the International Confederation of Wizards' Law Enforcement Team weakened the effectiveness of the Stunning Spell...

Under the combined effect of these factors, Grindelwald almost woke up as soon as he got on the carriage. But he was still bound by the spells of the law enforcement team members and couldn't move. Except for the peephole in his stomach that would jump every once in a while, he also felt it when Dumbledore and Felix transferred the spell key.

"Professor? Professor Happ?"

"Oh, I thought of something, but I can't be sure for the time being - is there any other question?" Felix came back to his senses and asked.

"Well - I also want to ask: Why didn't Professor Dumbledore transfer the spell earlier, or postpone solving the trouble with me?" Harry asked, "Then Grindelwald might not have run away."

"He didn't tell me directly, so I can only guess." Felix said softly: "I guess Dumbledore had difficulty using magic in the last period of his life, and the transfer spell had a great impact on him - you know that magic can flow between the body and soul of a wizard, right?"

Harry shook his head blankly, he had never heard of it. He wanted to remind the professor that he was not Hermione.

"Well, now you know," Felix said lightly, "Dumbledore used the Resurrection Stone as a medium, and his research on the soul was extremely in-depth, and he was able to actively integrate most of the magic into his own soul." Just like he saw Dumbledore use his soul to illuminate the Hogwarts Castle that night.

"Why did he do this?" Harry swallowed his saliva and asked, he felt that the magic he knew was completely different from what the professor said.

"Maybe it was for the purpose of conducting an experiment. I suspect that this is not the first time he has gone to the 'gap between life and death' you mentioned." Felix said calmly: "Don't ask me, I can't provide any evidence, but on the issue of solving the soul fragments in your body, Dumbledore and I have almost the same idea, which is to increase the success rate as much as possible, and it would be best to be foolproof."

"Success rate?" Harry lowered his head and muttered again.

"That's right." Felix said, "We have thought of some possibilities, such as letting Voldemort take the Rose Hard Liquid to revive. Dumbledore believes that doing so will allow the protection charm that flows on you and belongs to Lily to appear on Voldemort. Well, at that time, the power of the charm may be greatly enhanced. After all, your relationship is similar to that of half-brothers..."

"But this didn't happen, right?" Harry got goose bumps in his heart and said quickly, "Voldemort used other people's blood to revive."

"Indeed. I think we put too much pressure on him and he can't wait." Felix nodded and said, "But even if this happens, it will bring more uncertainty. The connection between you is already extremely close. If you add a shared protection charm, outsiders can't guess at all... Harry, Dumbledore wants you to be alive, using the safest method he can think of."

Felix left Harry, who was in a daze, and left. He asked Mrs. Pomfrey, and Harry was fine and would be discharged in the afternoon.

When Felix left the hospital ward, he happened to meet a classmate who came to visit Harry. He called Neville aside and asked him to borrow the damaged endoscope. Neville really took it with him. "Professor, is there anything wrong with it?" Neville asked in a low voice.

Felix looked at him and shook his head. He did not tell his guess, but changed his reason: "The people of the International Confederation of Wizards need evidence. I will take it first. If they don't need it, I will return it to you."

In the crowd, Ron and Hermione showed worried expressions. Is there really something wrong with the endoscope? Ron gave Hermione a wink and walked over from the team, "Oh, Professor Hepp, I have a question..."

...

Felix was not in a hurry to leave school and search for Grindelwald all over the world. In less than a week, the school year will be over. At that time, he can free up his hands and try to get Grindelwald's whereabouts from some saints. He was not in a hurry for these few days, and thought that Grindelwald would not jump out immediately.

But things did not go as he wished.

In the evening, Amelia Bones showed up in a hurry, bringing bad news: Grindelwald had escaped from Nurmengard Castle - Felix already knew about this - but the news in the German newspaper in her hand really surprised him.

A firebird that looked like a patronus but was covered with Grindelwald's iconic blue flame broke into the German Gringotts Bank, burned through an underground vault before the goblin guards could react, and then swaggered away.

Felix stared at the picture that was taken by someone unknown: the phoenix-like firebird broke free from the magic chain and held something in its mouth.

"Is that - a wand?"

"The identity of the owner of the vault below has been found out. He is a saint, but he died decades ago. When Gringotts and the local Aurors asked his family, they didn't know the existence of this place, which means it is a secret vault. And that wand -" "

The first wand Grindelwald ever used?" Felix asked in a deep voice.

Before Grindelwald got the Elder Wand, he certainly didn't cast spells with his bare hands, but when he became famous and fought in public in 1945, he always showed the Elder Wand to the public. No one knew where his wand from his student days went.

"I thought so too." Ms. Bones said with a stern face.

Felix's expression became serious. He looked further ahead. Getting the wand was not a big deal. What really caught his attention was that Grindelwald seemed to be unable to wait even for a few days.