"Miss Carlota Pinkestone, why are you here?" Dumbledore asked in surprise.

"Albus, who is she?" Professor Slughorn asked.

"A fifth-grader in Gryffindor." Dumbledore answered Professor Slughorn's question solemnly, then looked at Pinkestone. "Miss Pinkestone, what are you doing here?"

Pinkestone's expression was slightly confused, and then he suddenly became very frightened, and said in a trembling voice, "Professor, I'm not going to be expelled, am I?" ”

Dumbledore's eyebrows furrowed even deeper, and he took two steps forward and asked, "Miss Pinkestone, calm down first." We need to understand what you've just done here? ”

Pinkestone clasped his head in his hands and closed his eyes in pain, trying to think about something: "I...... I do not know...... I just seem to have put something on the wall of the castle......"

Dumbledore tried to make his tone as gentle as he could, but the eagerness was still evident, and he asked, "Now think about it, where did you put that thing?" ”

Pinkestone held out a trembling hand and pointed to a painting facing her.

Where she points is a plain-looking oil painting, with nothing but a glittering golden goblet with two delicate solid gold handles and symbolic carvings.

Dumbledore waved his wand and removed the painting from the wall.

The wall behind the painting is a shocking sight!

The heavy marble walls of light gray seemed to have been splashed with a pool of jet-black ink, and there was a trace of black mist with an evil aura escaping outward, as if this jet-black still had a tendency to spread.

On the other hand, the oil painting already has an evil aura on the back.

"Such evil black magic!" Professor Slughorn gasped, turned to Pinkestone, and asked sternly. "What the hell did you put on the wall?"

Pinkestone sat down in the corner, clasped his legs, and muttered helplessly, "I don't know...... I don't really know ......."

Professor Slughorn watched Pinkestone's performance, reluctantly took out a bottle of potion from his pocket and handed it to her, saying, "Calm the nerves, drink it first, maybe it will calm you down a little." ”

Pink Stone trembled and took the potion from the professor's hand and poured it into his mouth.

After drinking the potion, her face seemed to look a little better.

After seeing Pinkestone's face stabilize, Dumbledore said solemnly to Professor Slughorn, "Horace! We need to get rid of this dark magic first and get to that later! ”

"Understood." Professor Slughorn nodded. "It can't be allowed to spread any longer."

The two of them stretched out their wands, and wisps of silver magic squeezed towards the evil black smudge, causing it to shrink and weaken.

Looking at the traces of black magic in front of him, Xiwen suddenly thought of a question at this time, so he asked out loud: "Professor, if this is another magic node, then how many intact magic nodes are left in the castle?" ”

"There must be quite a few, right?" Professor Slughorn thought for a moment and replied uncertainly.

……

"Two left!"

At the same time, Helena, who was in the Hall of Ghosts, gave an accurate answer.

"Most of the structure of the castle has been made by my mother, and I know a little bit about it." Helena said.

"Hogwarts Castle itself is a great alchemical product, and the magic node of the castle is, in simple terms, a kind of magical hub left by the four founders, including my mother, when they built the castle. Each of the four of them left one of these hubs. ”

"There are many parts of the castle that need to rely on the flow of mana to run smoothly, and most of these mana nodes need to be transferred by mana nodes. If a mana node is destroyed, only one node will have no effect on the normal operation of the castle, but the effect will increase exponentially. Now that two of them have been destroyed, there should be a lot of uselessness in the castle. ”

Xiwen nodded secretly. According to the house-elf Budi, many of the utensils in the kitchen are no longer working.

"When the third mana node is destroyed, the entire castle's mana operation system will suffer a serious blow, and half of the castle will be paralyzed." Helena continued. "If all four nodes are destroyed, the magic of Hogwarts itself will completely dissipate and turn into an ordinary building!"

"Won't you feel anxious when the mana nodes are destroyed one after another?" Ghost Shiwen frowned, looked at Helena and asked.

"I'm just a ghost, what's the use of being in a hurry?" Helena smiled bitterly and shook her head, her expression sad.

"No!" Shiwen interrupted her and said firmly. "Even ghosts have a unique role."

"I think we should break the rules once!"

……

In the corridor on the basement floor, President Dippert and a group of professors also rushed over, and most of them also felt the previous vibration.

"Albus, how's it going?" Principal Duppet stepped forward and asked.

"Not good." Dumbledore shook his head and sighed. "This black magic can indeed be removed, but the magic nodes behind the walls have been completely eroded."

Principal Dippet's face turned unusually ugly.

At this moment, a large number of young wizards poked their heads out of the entrance to the corridor on the first basement floor, as if wondering why all the professors had suddenly left the table while the Halloween dinner was being held.

Because of their arrival, the hallway became noisy.

"Galadia, let them go back to their common rooms." Principal Duppet said to Professor Meles with some irritation.

Professor Meles nodded, and walked over to the group of curious young wizards, her voice faintly coming from the end of the hallway.

"All prefects, take the little wizards of their respective academies back to the common rooms of each academy immediately, and those who stay outside after ten minutes will be dealt with as violating the school rules!"

As Professor Melles' words fell, the voices of several prefects organizing discipline also came one after another, and the chatter of the little wizards gradually faded away.

"Why are you still here, Mr. Rozier?" Principal Dippert asked, noticing that Shewin was still where he was. "Do you want to be deducted points and locked up?"

Xiwen shook his head, looked straight into the principal's eyes and said, "Headmaster, I have something I want to report. ”

Principal Dippert frowned and said, "I'm sorry, Rozier. We have important things to attend to now, can you save your business for next time? ”

Xiwen said without giving an inch, "What if I say that what I want to say is related to what you have to deal with?" ”

"Armando, let him speak." Dumbledore spoke suddenly.

Headmaster Dippet gave Dumbledore a deep look, then turned to Sivan and said in a deep voice, "Then let's talk about it, Mr. Rozier." ”

"The culprit for destroying the Mana Node is Professor Lorrey!"

Xiwen said word by word.

……

……