A few minutes ago -

in the Defense Against the Dark Arts professor's office, the atmosphere inside was tense.

Snape pointed his wand at Lupin, his eyes flashing with a strange light, and he whispered, "What are you hiding?"

Next to a desk, Lupin also held a wand, and he sighed, "You suddenly appeared and scared me."

"Really...?"

Snape's eyes fell on Lupin's feet, where there was a palm-sized knight's armor, and scarlet eyes were staring at him. Thinking of his previous speculation, he had a strong desire, why not find a chance to crush it, it was too annoying...

"Armor is flying!"

He pointed his wand at it, but the next second, Lupin interrupted his spell swiftly: "I can't let you do this, Severus."

Snape's eyes became dangerous, he walked a few steps to the side, and Lupin also walked a few steps over, the two always facing each other.

"I've told Dumbledore a long time ago," Snape said slowly, "There's a traitor in Hogwarts."

Lupin said anxiously, "Use your brain, Severus, things are not what you think, why don't you go to Professor Happ to ask clearly."

"Give him to me!"

"I don't think so," Lupin said, and suddenly a thick snake-like rope flew out from the tip of Snape's wand. Lupin accurately stabbed a section of the rope, and the rope fell hard on the ground and broke into five or six pieces. "

He is very likely innocent. Think about it. Where did I get him? I can go with you to verify it."

Snape said murderously, "You want to prove his innocence? Give him to me, I'll see for myself-"

"Severus, you are possessed. There are some things you don't know. We think-Dumbledore also knows that the child named Ron, his pet mouse has a problem!"

Lupin avoided a spell, and the bottles in the office exploded with a bang.

"Start telling the story, Lupin? This is not enough time. You need to speed up." Snape shook out a cloud of black mist, which quickly gathered into a dozen chirping birds. As his arm thrust out like a sharp sword, these black birds all shot towards Lupin.

"You integrated dark magic into regular spells?" Lupin said in surprise. His movements were also very agile. He had more opportunities to come into contact with these dark spells than ordinary people, but he did not learn them, but studied how to resist them.

He waved his wand violently, and the parchment papers on the table flew up and formed a solid wall in front of him. The black birds stuck to it, fluttering their wings desperately, struggling to turn into wisps of black smoke.

These black smokes gathered together and turned into a big snake. The snake's head was raised high and hit the ceiling, and then its head fell suddenly.

The big snake broke through Lupin's defense. He grabbed the "Knight" and threw it out of the office window. "Go find Professor Happ!" He jumped to the side to avoid the big snake.

"Buzz~"

The whole office shook, and the tables, chairs, and cabinets in the room jumped together.

"Blackfly--"

"Swish!"

A red light brushed Snape's cheek and hit the filing cabinet behind him. Lupin stood up from the dusty floor. "I can't let you do this, fool. I've wanted to fight you for a long time."

Snape smiled, but no one would think that this was a kind expression. "Really? No longer pretending to be a good guy? A tamed werewolf?"

"I never pretended--Armor Protection!"

Lupin blocked a suspicious blue spell. The reason didn't make sense anymore. He waved his wand, and red lights continued. Snape waved his wand repeatedly, picking up these spells one by one. He took two steps back and stabbed his wand straight out--

"God of War!"

"Swoosh!"

Rows of wooden boxes were neatly cut open. Lupin quickly avoided it, and a tiny wound cut his cheek. "This spell... Impressive!"

He shook his wand, and Snape quickly propped up an invisible barrier, and the spell was deflected and hit a locked box.

"Don't!" Lupin exclaimed.

A red-haired woman came out, "Severus, why..."

Snape's eyes widened, he staggered back, his wand slipped from his hand, his body shrank, "No, no..."

"Why..."

Lupin stood in front of Snape in panic, the illusion in front of him disappeared, and turned into a full moon. He sighed with a complicated expression, and raised his wand for a long time: "Funny slip--"

"Boom!"

The full moon suddenly exploded and shattered. Lupin looked back in astonishment and saw Snape holding his wand expressionlessly.

"Remus Lupin!" He gritted his teeth and said.

"Severus, that was an accident. Boggart was practicing the Patronus Charm for Harry." Lupin retreated vigilantly. Snape's condition was not right.

"Shh!"

The fierce fire ignited the office and everything. Snape waved his wand with messy hair. Lupin was defeated step by step. He could only hold on and use the Stunning Charm in the gap between Snape's attacks.

"What happened here? Oh, my God!"

A cheerful female voice appeared at the door. Lupin only saw that the person who came in had bubble gum pink hair, but then she was hit by a Stunning Spell and disappeared from sight.

"Snape, stop, someone is injured!"

But Snape rarely lost his composure. He ignored Lupin's shouts and cast more and more powerful spells. He used strange black magic recklessly, and a layer of black light appeared on his face.

Lupin gradually lost his strength, and Snape waved his wand with a grim expression.

A crisp chirping sound suddenly appeared, and a silver swift condensed in the air, cutting the battlefield in half.

"Severus, Professor Lupin, please stop..."

A black spell flew over, and the silver swift vibrated its wings slightly to avoid the attack, "Severus, you--"

"Get out of the way!"

Lupin said hurriedly: "Snape hit the box where I kept the Boggart and walked out of it--"

"Shut! Lupin!"

Snape interrupted him angrily. He was brewing a terrible magic. The house began to tremble, and with him as the center, the ground quickly corroded outward.

The Swift Patronus suddenly expanded, and white light burst out from its body. Dazzling halos spread out like huge ripples. Snape's unformed magic made a sizzling sound, and dark red electric light burst out at the junction. The two sides of the junction were completely opposite worlds, one was corrosion and darkness, and the other was warmth and light. A gentle voice came

from the Swift Patronus, "Severus, calm down."

Lupin hurriedly said, "Severus, we have found new clues. Peter Pettigrew is not dead, he is still alive, and everything is directed and acted by him!" Snape

seemed to wake up. He took the initiative to remove the magic. The light of the Patronus spread to him, constantly washing away the black air on his face. He leaned against the wall and slowly sat down. The

Swift Patronus left a sentence, "I'll be there soon." Then it turned into blue and white stars.

A moment later, Felix appeared in the office. Most of the room was destroyed, a small part of the furniture was corroded, and another small part was still burning with small flames. A row of wooden boxes were neatly cut, and the cuts were as smooth as mirrors.

"Sweep it all away!" The smoke and dust in the room were taken away, and the flames were extinguished.

Snape sat against the wall, staring at the ceiling motionlessly, his black eyes were like stones, and there was no sight in his eyes. Lupin was taking care of an unconscious young woman. He took a look and it turned out to be Tonks.

Felix frowned. Was he really angry because of Sirius Black? He looked around and didn't see Sirius in the knight can. Would he be killed?

Snape had no intention of communicating with anyone. He could only walk to Professor Lupin and asked, "How did they fight like this?"

Lupin smiled bitterly and said, "They were all accidents, a series of accidents."

Felix looked at Tonks on the sofa, "Why is she here?"

"I don't know. She seemed to have suddenly run out. Maybe she wanted to stop the fight? But she was knocked unconscious by my Stunning Spell..."

"Just a Stunning Spell?" Felix looked at Tonks' face. She didn't seem to be awake at all.

"She's fine," Lupin explained, "I didn't remove the magic. It's not appropriate in this situation... I can't take her to the school hospital."

If he removed the Stunning Spell, Tonks would have to see the fight between the two Hogwarts professors. Although she had already seen it, it would be easy to implicate Sirius. If he took her to the school hospital, he was worried that something might happen to Snape, so he had to let her go first.

"Got it," Felix cast another Stunning Charm on Tonks, "Send her directly to the school hospital in a while, no need to say anything."

Felix picked a chair with a cut back and sat down, gave Lupin a look, and raised his voice, "Professor Lupin, explain what happened, didn't you tell Severus that Peter Pettigrew was the culprit?"

He mouthed, signaling Lupin to pull the blame on Peter Pettigrew.

Lupin understood, and he spoke as detailed as possible: "On the first day of school after the Christmas holidays, in the staff lounge next to the Great Hall, we and Headmaster Dumbledore speculated that there were huge doubts about the murder of James and Lily, because Sirius had a good chance to kill Harry, but he didn't do it. His target was Harry's friend, Ron Weasley."

"I don't remember it clearly," said Felix.

"Then let me explain again - Sirius Black is an Animagus, he can turn into a big black dog, similarly, James can turn into a stag and Peter Pettigrew can turn into a mouse," Lupin said self-deprecatingly: "They want to accompany me, a werewolf, during the full moon."

"In this case, it's clear why Black escaped from Azkaban, but why did he attack Ron Weasley?" Felix continued to ask, and Snape's eyes rolled in his peripheral vision.

"Ron raised a mouse. To be more precise, it was raised by their family. This mouse suddenly appeared in the Weasley household and stayed there for twelve years until Sirius attacked during the holidays and disappeared without a trace. But we saw its image, and it was exactly the same as Peter Pettigrew's Animagus!"

"So, he is not dead? Peter Pettigrew, the winner of the First Class Order of Merlin and a war hero, not only is he not dead, but he is hiding in a wizard family as a pet under an assumed name?"

Lupin looked at Felix strangely, but could only follow his words and said, "Yes, this is the biggest doubt, so we suspect there is something else going on. Professor Happ, how did Sirius become a magic puppet in your hands?"

"I caught him, and then we - Dumbledore and I plan to set up a trap to lure out Peter Pettigrew. Your help will definitely be needed by then, so the secret is only temporary." Felix explained.

Lupin asked the biggest question in his heart nervously, hoping to get an answer: "So, Sirius is innocent? But he is the secret keeper of James's family. The Fidelius Charm cannot be broken at all, just like an unbreakable oath. If he is innocent..."

"You didn't ask him?"

"I didn't have time."

"Well," Felix thought about it and decided to use this opportunity to explain it clearly. He also said this to Snape, "Because the secret keeper was changed, Sirius thought he was too conspicuous, so he privately replaced the secret keeper with the inconspicuous Peter Pettigrew."

"So that's it," Lupin murmured, "At that time, the actions of the Order of the Phoenix were leaked many times, and everyone suspected that there was a traitor, and people were panicked." "

So-" Snape stood up, "Peter Pettigrew is Voldemort's real undercover?"

Lupin looked at Snape in surprise. He actually called Voldemort's name directly, and his original suspicion disappeared at once. You know, when Dumbledore tried to protect Snape, he was still very shocked.

Snape said coldly: "Exchange the secret keeper? Stupid!"

"Severus..."

But he ignored Lupin and limped away. Before leaving, he said: "Regarding Peter Pettigrew... let Felix tell me what I need to do."

Lupin opened his mouth and closed it again, saying nothing, watching him leave quietly.

"Leave him alone for a while," Felix said, looking around, "You beat him too hard." In the whole room, except for the sofa where Tonks was lying, there was no other place to stay.

"Alas, it's all an accident..." Lupin sighed, he sighed too many times today.

"This office can't be used anymore, you should discuss with Dumbledore and change to another one."

"That's the only way." Lupin said, fortunately he released some magical creatures used for teaching a few days ago, otherwise few of them would survive, and the only living creature - Boggart was blown to pieces, not even a wisp of smoke was left.

"By the way, where did you hide Sirius?" Felix asked.

Lupin was startled. He had forgotten about this long ago. "I threw him out of the window during the fight just now..." Looking at Felix's strange eyes, he said guiltily, "I asked him to find you."

"Well, okay." Felix shrugged, "I hope he won't be picked up by some little wizard."