Hogwarts: I graduated before the system came

"I almost forgot, we can use magic now."

He then drew his wand and cast a glowing spell.

The other students in the corridor only remembered this incident after seeing this scene.

They drew their wands and cast glowing spells.

The light of the Luminous Charm slowly extended from Harry and the others' side to both sides of the aisle.

But soon, the students in the distance noticed something unusual. Due to some kind of interference, their glowing spells could not be cast, and they even saw a terrifying face...

However, Ginny and the others had already entered the compartment and did not see the scene outside.

At this time, a hoarse voice came from the compartment:

"Quiet!"

Professor Lupin, who had been sleeping since getting on the train, finally woke up. His tired gray face looked a little pale under the light of the glowing spell in the carriage, but his eyes were full of alertness.

With a slight crack, a flickering flame illuminated the compartment. Professor Lupin seemed to be holding a fire in his hand, making the whole compartment suddenly warm.

Everyone suddenly felt that their glowing spells were no longer effective. Torches seemed more suitable on the cold train.

He stood up slowly, holding up the flame, and said in a hoarse voice:

"Stay still!"

But before Lupin could reach the door, the sliding door slowly opened and everyone's glowing charms began to flicker.

The flame in Lupin's hand also trembled and shook.

But everyone still saw clearly that there was a tall figure in a cloak standing at the door, almost touching the ceiling.

His face was completely hidden by the hood.

Harry glanced over and saw a hand sticking out from under the cloak. It was grayish-white, gleaming eerily, and seemed to be covered with slime and spots, like something that had died and rotted in water...

Before Harry could feel uncomfortable, he suddenly felt something burning hot in his chest. Suddenly, a dazzling white light came out from his chest and quickly tied the Dementor into a ball. Before everyone could react, the white light pulled the Dementor and flew back to Harry's chest, then disappeared.

Everyone followed the white light and looked at Harry.

But before they could say anything, voices came from outside.

They saw many Dementors running frantically from the corridor in front of their compartment doors.

A dozen seventh-year students marched in unison, wands in hand, casting a luminous spell, pointing at the group of Dementors and shouting:

"Back off, back off!"

It was not known whether these Dementors were afraid of the special luminous charm of these students, or were overwhelmed by their aura, and really gathered together and retreated.

Behind the group of seventh graders, Percy and Penelope, the head boy and girl student councils, shouted loudly from behind the crowd:

"These are the Dementors guarding Azkaban. Don't hurt them!"

Several sixth-grade students who had learned the Patronus Charm last year drooled as they looked at the group of Dementors.

Should they try it too...

At this moment, an unlucky Dementor was squeezed into Harry's compartment by his companions, and happened to meet Harry's eyes.

Under the gaze of everyone, a large silver bird flew out from Harry's chest this time, knocking the Dementor that had accidentally entered directly away, while the other Dementors crowded in the aisle retreated even faster.

At this time, several students who had learned the Patronus Charm recognized at a glance that the big silver bird was the same as the big bird that Professor Holmes had used to demonstrate the Patronus Charm to them.

Although it was unclear why the previous professor's patronus appeared here, since the professor had taken action, they naturally had to follow closely.

Perhaps due to the seventh-year senior's special glowing charm, none of their Patronus Charms failed.

Suddenly, several silver animals flew over the heads of the seventh-year seniors who were shouting "Retreat, retreat, retreat" in front, and rushed directly towards the retreating Dementors.

The entire train aisle erupted in warm applause.

The big silver bird flew out from Harry's chest, but not far away, it turned into a white light and returned to Harry's chest again.

Lupin hurried forward and grabbed Harry's shoulders, and asked nervously:

"Harry, are you okay..."

Harry didn't understand why the new professor was so familiar with him, but he shook his head and said:

"Thank you, I'm fine..."

Hermione said:

"The thing that just bound the Dementor looks so familiar to me. It's a bit like Professor Holmes's spell..."

Harry also reacted from his daze and quickly took out the wooden sign from his arms. He saw that the wooden sign was still very hot.

He said excitedly:

"It was him. It was a wooden plaque my cousin gave me. He said it would protect me if I were in danger. I thought he was joking because he also gave one to my Muggle cousin...

I didn't expect it to be true. Was the Dementor just now eaten by this wooden sign?

And what is that big silver bird?

By the way, is that thing just now the guard of Azkaban, called a Dementor?"

Everyone looked at Harry with envy. Even Ron, Ginny and Neville from pure-blood families didn't have this kind of thing that could automatically protect people.

Professor Lupin seemed relieved, but still said worriedly:

"Harry, I suggest you store this sign somewhere else. After all, he just caught a Dementor and no one knows where it went."

Harry shook his head. His cousin had told him to wear it close to his body. He really didn't expect that his cousin would give such a valuable thing to a Muggle.

Everyone watched as Harry stuffed the wooden sign into his arms again and couldn't help swallowing.

Chapter 178 Not a fuel-efficient lamp

Lupin watched Harry's actions, forcing a smile on his tired face and said:

"I've heard of the 'banana-loving flat-headed brother' a long time ago. He has accompanied me through many dark days in the past."

Later I found out he was actually the Defense Against the Dark Arts professor at Hogwarts. Headmaster Dumbledore had told me about him quite a bit, saying he was unique in magic and had his own standards for education...

I really didn't expect that he was actually your cousin. I've never heard of it before...

It seems I really need to find time to have a good chat with him. I hope I can see him at Hogwarts this time."

His next words startled everyone in the car.

Harry asked curiously:

"Professor Lupin, do you know my cousin? I heard him say that he is very familiar with the new Defense Against the Dark Arts professor..."

Lupin was stunned when he heard Harry's words, then suddenly thought of something and said with a smile:

"I have never met Professor Holmes before, I have only read his writings.

But he was indeed very familiar with the new Defense Against the Dark Arts professor. Of course, this was assuming nothing unexpected happened...

I still need to talk to the driver, you guys chat..."

Having said that, Lupin strode out of the compartment.

The Dementors outside had already been forced out of the train.

The group of sixth and seventh graders who were driving away the Dementors were surrounded by a group of people cheering.

Percy and Penelope looked at each other sweetly, drawing circles on each other's palms and saying symbolically:

"Don't hurt them. They are Azkaban guards sent by the Ministry of Magic to inspect the carriages."

Percy had received the message from Douglas a long time ago, telling him some truths, allowing him to secretly help Harry complete the task under certain circumstances.

But he was also asked not to stand up and go against the Ministry of Magic...

And allowed him to tell Penelope about this in Dumbledore's name, so that the two could act together.

Douglas took great pains to create opportunities for his younger brother.

The compartment was bustling again.

Harry and the others were discussing enthusiastically the meaning of Professor Lupin's last words and the Dementors.

Still at Holmes' home in faraway Surrey.

Douglas complained while writing and drawing on paper.

Dobby was eating chocolate while panting.

Sirius Black had nothing to feel embarrassed about. After all, this condition was obtained by exchanging his ten years of freedom. If it were not for the opportunity to see Harry often, he would never have agreed to research alchemical products for him for ten years.

After all, neither of them is easy to deal with. They were both people who gave the professors a headache at Hogwarts.

The original plan was that Sirius would wait at home in Hogwarts for Harry to investigate the truth, and then the two of them would communicate through a two-way mirror.

(A two-way mirror is a pair of small square mirrors magically linked together, allowing people to communicate with each other across different locations.)

Sirius knew that the only two-way mirror known in the wizarding world was in the Black family's old house. He and James had often used this thing to communicate, so he was sure that Douglas did not have a two-way mirror. So when they made the appointment at the beginning, he thought of how to cheat and let the other party take him to Hogwarts.

After all, he had been imprisoned in Azkaban for more than ten years. Even though the conditions in the Douglas family were a thousand times better than in Azkaban, Sirius felt that living in the Holmes family without Harry was more uncomfortable than being in prison.

But Sirius didn't expect that before leaving, Douglas actually took out the two-way mirror.

This forced him to be shameless and start acting like a rogue, insisting on going to Hogwarts with Douglas.

Douglas felt that he shouldn't believe some of the plunderer's promises. It would be better to hope that Banban would surrender himself than to expect him to be honest.

The reason I didn't take him to Hogwarts wasn't because I was worried he would be discovered.

Instead, they were worried that he would lose control of himself and kill Banban early.

But if he wasn't allowed to go now, Douglas was worried that Sirius would go to Hogwarts alone, unless he could be cruel enough to really tie him up like a dog.

So after signing a package of treaties with Sirius, Douglas used contract magic this time.

Unless Sirius doesn't care that Harry won't be able to have children in the future, he will have to abide by the contract.

Of course, Sirius hadn't noticed that Douglas had written in invisible ink in an inconspicuous place on the contract: "The right to interpret this contract belongs to Douglas Holmes."

The consequence of this was that, as planned, Douglas would have returned to Hogwarts by now, drinking tea by the fireplace in his office, and waiting to see the students' reactions when they saw him.

But now we have to add another secret passage leading to the outside world to Hogwarts.

To avoid detection from Hogwarts Castle and Dumbledore.

Douglas thought of the Floo Network.

Of course, it is not a link to the Ministry of Magic's Floo Network, but a theory that uses the house-elves' Apparition, portkeys (portkeys are magical items that can teleport people who touch them to a designated location. The use of portkeys is strictly regulated by the Ministry of Magic), otherworldly magic teleportation arrays, the Floo Network, etc.

Bypassing the Ministry of Magic and Hogwarts, he connected the fireplace in his home to the fireplace in his Hogwarts office.

After all, I can't let Sirius really share an office with me. It's not appropriate, it's not suitable.

So from noon to afternoon, Dobby took Douglas to the Defense Against the Dark Arts office at Hogwarts several times through Apparition.

Fortunately, Dumbledore was reliable and did not treat himself as a missing person, so he cleared out the Defense Against the Dark Arts office.

Finally, when it was dark, Douglas drew the required rune formation on paper. All that was left was to draw this set of runes on the fireplaces at home and in the office.

It took another hour, and Douglas finally successfully drew the runes on both sides.

Douglas then entered the three people's information into an identification rune.

After all, this matter not only concerns the safety of Hogwarts, but also the safety of the Douglas family.

With a handful of Floo powder sprinkled, the three of them were successfully teleported to the Defense Against the Dark Arts office at Hogwarts one after another.

The three of them waited in the office for a while, confirming that Dumbledore had not noticed anything and that the Ministry of Magic had not found anything abnormal.

Sirius returned to Douglas's house through the fireplace with satisfaction.

The two of them agreed to contact each other using a two-way mirror before coming to make sure there were no outsiders before teleporting.

Dobby was also sent back to study by Douglas.

With this secret passage, Douglas can return to his home in Surrey at any time.

So Dobby, who originally expected to work with the house-elves in Hogwarts Castle, was once again assigned study content by Douglas.

What Sirius didn't know was that even without his request, Douglas planned to build a secret passage between Hogwarts and his home. Otherwise, how could such a complicated teleportation array be successfully researched in just one afternoon?

After all, the research on the magical building has been completed halfway, and verification may begin at any time. There are too many magical interferences in Hogwarts, so this experiment can only be done at home.