I swung a sword at Hogwarts

The seniors seemed to enjoy teasing the juniors, as Malfoy told a junior with a smirk.

As long as you see a mermaid underwater, you will be blessed.

The lower grade students believed it naively.

Malfoy had a bad taste in his mouth and said, "In fact, there is a more advanced blessing than the mermaid blessing."

"What is that?" the younger students asked in admiration.

Malfoy smiled mysteriously and whispered, "Have you ever heard of the legend of John Underwater?"

"John Underwater?"

The junior student looked dazed, raised his hand and pointed at the huge glass, and asked, "Is it like that?"

Malfoy looked over, nodded and said, "Yes, that's it. When you see John underwater, you can...wait!"

Malfoy turned his head sharply and looked at John walking underwater, his mouth open.

It really is John Underwater.

Reproduction of classic scenes.

...

Chapter 470 The Poisoning Suspect

Not knowing that he was being passed down as a Slytherin by Malfoy, John dived all the way from the Black Lake to the place where the giant octopus lived.

In a place that looked like an underwater altar, a giant octopus was lying there.

It was as if it had not moved since John left, maintaining its posture without changing.

John still remembered what happened the last time he used mental magic, so he was cautious and didn't use it this time.

Even though his magic power was already level 6, John could still feel the giant octopus's unusual power.

Maybe he really is an underwater version of Dumbledore.

"Black Lake Spirit, if you can understand my language, please talk to me."

John used an extremely ancient language to communicate underwater. He transmitted the mental magic in one direction so he was not afraid of being impacted by the thousand-year-old memory.

The giant octopus, which was originally sleeping, moved after hearing the sound.

It seemed to understand, its tentacles moved, and its big eyes looked at John.

John was delighted by the ancient charm revealed by the giant octopus and they really started to communicate with it.

Now that we can communicate, everything becomes easier.

John lowered his posture and spoke in a humble tone: "Spirit of the Black Lake, I am a student of Hogwarts, and I need your help with something."

The voice entered the giant octopus's head and its tentacles moved, signaling John to continue.

"I am looking for ancient blood and want to obtain it from your great body." John stated his purpose without any pretense.

"I am a person who abides by my promises. I can achieve my goal through trading."

He stared at the giant octopus, wanting to see what conditions this creature that had lived for a thousand years would put forward.

But maybe John made it too complicated, or maybe his language wasn't fluent enough.

The giant octopus shook its tentacles there, and it took a while to digest what John meant.

Hearing that his blood was being asked for, the giant octopus extended a tentacle.

John was stunned. No request?

The giant octopus waved its tentacles and revealed a feeling of pleasure.

It seemed to be very happy to be able to help the students of Hogwarts.

Compared to humans, the emotions of these creatures are purer.

John's attempt to deal with these creatures in a human way led him into a dead end.

John looked at the large tentacle and a smile appeared on his face.

I am too narrow-minded.

In a world full of calculations, I have forgotten this purity.

I didn't expect that I would be taught a lesson when I came here to look for the giant octopus.

He expressed his gratitude to the giant octopus again and was very happy to see its tentacles waving. He was going to start taking blood.

It is also somewhat difficult to draw blood from the water.

John used magic to clear a waterless area, and the giant octopus curiously used another tentacle to move back and forth.

A bottle of blue liquid was sealed.

"Thank you, respected Black Lake Spirit. Please allow me to use a bottle of my own brewed wine to repay your generosity."

John took out the few stars and poured them onto the tentacles of the giant octopus.

The golden liquid fell into the tentacles and quickly disappeared.

The giant octopus was very happy and liked this thing very much.

John smiled knowingly when he saw this. The stars were made of pure magic power, and all of these magical creatures loved them very much.

In the giant octopus's excitement, John saw the lake water quickly turn black.

It's the giant octopus spraying ink.

Just the amount made John very suspicious that the black color of the Black Lake was dyed black by the giant octopus.

After collecting some ink, John was sent to the surface of the lake by the giant octopus.

Stepping on the lake, the meteor shoes prevented John from falling.

He said goodbye to the giant octopus.

The harvest this time was quite rich.

Let him forget the time underwater and wait until he comes out.

He saw that the sky had darkened.

Using magic to remove the water from his body, John walked towards the castle.

"The giant octopus has strong vitality. I think it can continue to live."

John didn't know how long the giant octopus could live, but judging from its appearance, it could easily live until its own death.

And the most surprising thing is that the giant octopus is still growing.

"Its size should be much larger than it was thousands of years ago."

Looking back at the black lake, John muttered, "Maybe one day, the giant octopus will be bigger than this black lake."

The more John thought of that scene, the more terrified he felt.

What Voldemort, Grindelwald, the growth and vitality of the giant octopus are the most terrifying.

Back in the castle, John meets Filch.

He was sitting leisurely at the stairs, eating exquisite snacks.

However, that snack does not seem to be sold by Honeydukes.

John looked twice and circled Filch twice.

Filch muttered uncomfortably, "What are you doing?"

"Filch, how fast do you think you can run?" John suddenly asked a question.

Filch was stunned for a moment, then said honestly, "You can reach Gryffindor Tower from here in a minute."

"Too slow," John frowned and said, "You can't go that fast."

"?" Filch asked with a puzzled look.

My speed is already a nightmare for students, how can it be considered slow?

"Have you ever heard that speed equals power?"

John's eyes flashed, "I think you can go faster."

"This speed is only the limit of your shoes, not your limit. You can go faster."

Filch was confused by what John said.

But he remembered one thing: speed equals power.

In fact, Filch has a very outstanding ability.

That is, he has very good eyesight.

Even wearing this pair of shoes that can reach flying speed, he can still accurately catch people without hurting any students.

If he weren't a Squib, maybe Filch would have been a pretty good Seeker.

Mrs. Norris saw John and rubbed around his trouser legs.

Planting a faster seed for Filch, John heads to the Star Society.

He wanted to try and make good use of the giant octopus' ink.

For a being that has lived for thousands of years, any item on its body has an extraordinary function.

However, this time he was stopped before he reached the Star Society.

...

school clinic.

"So he was drunk and this happened?" John looked at Ron lying unconscious on the hospital bed, with a thousand doubts in his mind.

Dumbledore stood beside the bed, while Harry was beside Ron, glaring at John.

His best friend was in a coma because of John.

Dumbledore said gently: "I checked the bottle of wine, and there is indeed a poison in it that can kill people."

He looked at John with a probing look in his eyes and asked, "Did you give that bottle of wine to Slughorn?"

"That's probably it. After all, other wines don't have such a mellow aroma." John nodded in acknowledgment.

But his expression without any guilt made Harry very angry and asked, "Why did you poison me?"

John looked at Harry like he was an idiot and sighed, "Use your brains, Harry."

"If I were to take action, do you think this is necessary?"

John said calmly, "It's obvious that someone tampered with the wine."

"Really? Then who else would touch that bottle of wine but you?" said Harry.

"You'll need to ask Professor Slughorn about that," John said casually. "You can run into a lot of people."

"The most important thing."

John glanced at Ron who was in a coma, and said confidently and easily, "Do you think it would be that easy for me to poison you?"

Two drops of emerald potion saved him. John is not that low-end.

Although Harry was angry, his mind told him that John was right.

There was the Emerald Potion in Slughorn's office, and if John wanted to poison someone, he wouldn't have left the antidote there.

But unfortunately for Ron, he drank the antidote in advance and then drank the poisoned wine.

Dumbledore didn't seem to think that John had done it from the beginning to the end. He acted calm and wise, and said to John: "Then there is only one possibility, someone entered Horace's office and poisoned your wine."

"Let us think about who has been in and out of Horace's office recently?" said Dumbledore.

John said calmly, "I haven't been in since Christmas."

"Professor Slughorn is going to hold a slug party. Perhaps we can start from there."

This time, the poisoning felt familiar to John.