a certain scientific harry potter

(ps Actually, if you do some calculations, you know that it is entirely possible to go from a few hundred Galleons to [-] Galleons in just over a month.

Ludo Bagman came to the protagonist once a week to pay back the money, but every time he would be short of a thousand Galleons, so he had to borrow it again.

Then calculate it based on 1500 Galleons. If you borrow it for five weeks, you will already have 7500 Galleons. If you add the principal, it will be 9000 Galleons. If you calculate the interest casually, it will be tens of thousands in minutes...

Of course, Ludo’s situation is quite extreme. After all, there are very few people who are so obsessed with hitting the south wall, but he is a fool, so don’t get entangled in the specific details. Just changing the method can also make him owe a lot. debt~

In a word, some things are very scary, and you should never touch them!

above~)

Chapter 680 Diving into the Black Lake and Visiting the Mermaid

After solving Ludo Bagman's matter, Harry summoned a house elf and asked him to put the money from the scam on the account of the nursing home.

After this, Harry thought for a while and decided to go to the Black Lake.

The second match of the Triwizard Tournament was about to start in less than half a month, and Harry needed help from the mermaid, so he had to say hello to Mercus and the others in advance.

So he came to the pond in the courtyard of the nursing home, gathered the power of the water element in all parts of his body, and jumped into it.

The bottom of the pond in the nursing home is connected to the Black Lake. As long as you dive to the bottom of the lake and find the corresponding magic circle, you can easily teleport to the bottom of the Black Lake.

hum~

A faint light flashed at the bottom of the water, and in the next second, Harry had already appeared at the bottom of the Black Lake.

"Hiss...it's cold."

As soon as the water area changed, Harry immediately felt a biting chill, so he hastily cast a spell on himself to keep warm.

Diving into the Black Lake at such a temperature is definitely not a small challenge for the warriors, but with Hermione's intelligence, she must be able to think of the heat preservation problem in advance.

Harry looked around to identify the direction. The visibility under the Black Lake is very high now. From the summer vacation of the second grade to the present, after more than a year and a half of treatment, the water quality of the Black Lake is now much better than before.

In other words, if the Black Lake was still the same as before, with a group of people from Hogwarts rowing inside even pulling and throwing everything, then Harry would definitely not agree to Hermione's participation, after all, it feels disgusting to think about it.

If Hermione came up to vomit after swimming laps, Harry would feel so distressed~

Now there is no problem. After the estuary was reopened, the dead lake water turned into living water again. Not only did it become clearer than before, but the garbage and sundries under the water had also been cleaned up.

At this time, the Black Lake is full of aquatic plants floating with the water waves and various unknown algae, which are obviously beautiful corals brought by mermaids from the ocean.

They are planted on flat fine sand, emitting a dreamlike soft light in the dark lake water, like street lamps with unique shapes.

And the end of the road is the destination of Harry's trip.

He dived down to the 'sand' at the bottom of the lake, and as soon as he stood firm, he immediately attracted the attention of the aborigines here.

A few Grindyllos flashed out from the surrounding water plants, and immediately after seeing Harry, there were bursts of screams.

Of course, although the voice was ugly, it was not malicious, and the Grindylos were just passing on news.

Soon, Grindylow's voice attracted the true masters of the lake. They were mermaids holding spears, and they were accompanied by a few beautiful horse-headed fish-tailed sea monsters.

"Master Granger? Why are you free to come to the lake today?"

As soon as they saw Harry, all the mermaids surrounded him respectfully.

One of the mermaids politely asked Harry why he came, and Harry vaguely remembered that the other party was one of Mercus' deputy.

However, his appearance seems to be a little different from before.

"Is there any change in your appearance? I just didn't dare to recognize it."

Harry took a serious look around, and found that not only the murloc who just spoke to him, but almost all the murlocs were different from before.

The few murlocs patrolling the outskirts of the village were all males. They were different from the crooked, big and three-thick ones in the past. Their appearance was much better than two years ago.

Although it may not be considered handsome, but at least it is attractive, anyway, it has nothing to do with being ugly.

Their body shapes seem to have changed a lot. The previous mermaid shape can only be described as casual. Although it is mighty and rough, it is actually a big and strong lump.

But it is different now, as mermaids, they really have the mermaid line.

"It's all thanks to your help!" The mermaid who spoke to Harry said gratefully, "Thanks to the change in the water quality of the Black Lake, we are no longer what we used to be. She's too old, you'll know it when you see her."

"I see." Harry nodded, but he was a little surprised in his heart. He didn't expect the mermaid to be so sensitive to changes in water quality.

He had read in books before that mermaids are creatures that are significantly affected by water quality. For example, mermaids living in fresh water are not as aggressive as those in sea water, and mermaids in warm waters tend to be more beautiful.

But he always thought that this kind of influence should gradually appear along with heredity, but he didn't expect that less than two years later, this group of mermaids had already started to change.

The mermaids who came to welcome Harry led Harry towards their village. They kept singing clear and high-pitched songs on the way, as if they were communicating with their fellow tribe members, and soon there would be singing songs with different timbres. respond.

When Harry finally arrived at the destination, many people from the mermaid clan came out to greet him.

They stood in front of the house carved out of stone, most of them looked forward to it, and when they saw Harry appearing, they burst into bursts of pleasant cheers.

After that, several mermaids came forward at the same time. The leader of the mermaids was holding a spear with a golden tip. He was Mercus, the leader of the mermaid tribe.

If it hadn't been for the mental preparations, Harry really wouldn't have recognized her at all.

The previous mermaid was right, Mercus's appearance changed more obviously, her original iron-gray skin had turned into a kind of lustrous fairness, and her dark green hair also appeared more supple, tied into a heroic posture behind her. She has a sassy ponytail shape; now she wears a crown decorated with pearls on her head, and she is also wrapped with gauze-like water plants... There are also two large shells attached to her chest.

That's right, after all, it's not the original three-strand beard and chest hair. The aesthetics of the mermaid tribe's clothing seems to be constantly evolving.

"Harry, it's great to have you here!!"

When meeting Harry, Mercus looked very excited, and when he swam over, he gave him an excited bear hug.

"Hello, Mercus..." However, Harry could only smile awkwardly, and then kept his gentleman's hand the whole time.

Although there is no taboo in this regard in the concept of a mermaid, Harry doesn't want to take advantage of the other party like this.

"I just received a summons. The tribe said that you came to the Black Lake. I couldn't believe it for a while. And you..."

Mercus looked at Harry in a daze, she hadn't noticed anything unusual until now.

Harry didn't use the Bubble Curse at all, but he didn't seem to be affected by the lake water at all, just like them mermaids.

"I wanted to discuss with you about the Triwizard Tournament, so I didn't invite you here." Harry explained with a smile, "But you seem to have had a good time in the past two years, and everyone has added a lot of decorations. , and there are more iron objects."

"Speaking of which, it's all thanks to you."

When mentioning the current changes of the mermaid tribe, Mercus also showed a grateful smile like the previous mermaids.

"Since the opening of the mouth of the Black Lake, we can also go on long hikes to explore the ocean. These things are all found in the ocean."

Chapter 680 Confession of the plan, on-site alchemy

Mercus—and of course all the other mermaids—was very grateful to Harry.

If Harry initially won the friendship of the mermaid leader Mercus only by relying on the strategy of "hit a stick and give me a sweet date", then everything he did later will undoubtedly make the mermaids treat him Be regarded as a great benefactor who must be remembered forever.

The cultural prosperity of mermaids is even higher than that of centaurs. Their sense of art seems to flow in their blood. Almost every mermaid is a master of jewelry, weapons, and architectural sculptures.

But in the past few decades, they have guarded the barren land of Black Lake and endured the deteriorating water quality. Not to mention artistic creation, even basic survival has become a problem.

It was Harry who finally solved their crisis of survival, which restored the vitality of the Black Lake underwater, and the mermaids gradually regained their past prosperity.

Therefore, the mermaids would definitely obey Harry's instructions.

Just like now.

"By the way... I have something to talk to you about the Triwizard Tournament." After introducing Harry into the room in the village and taking a seat, Mercus seemed to have thought of something, "Didn't those warriors get the gold medal before?" Egg, the song we mermaids sing inside the golden egg, the so-called stolen treasure actually refers to people."

"A human?" Harry frowned. "So, Mr. Principal, they are going to put the students underwater?"

"That's right," Mercus nodded, "They will select the most important of the four warriors, put a spell on them to put them to sleep, and then hand them over to us to take care of them. Within an hour, the warriors Need to come to our merfolk village, find and bring people out of the water."

"Is that so... What if the timeout expires?" Harry continued to ask, "If the hostages are not rescued after an hour, will the hostages be in danger?"

"Dumbledore said no, they will cast a spell to protect them, and after the game is over, we will send back those who have not been rescued." Mercus explained, but then showed a look of "I understand ’ smile, “So you don’t have to worry about your little girlfriend at all. Isn’t she wearing my bracelet on her hand? Under the Black Lake, I guarantee that she will be able to pass through unimpeded.”

"No, it's the opposite." However, Harry shook his head when he heard Mercus say that, "Mercus, on the day of the competition, I need you to increase the difficulty and try to prevent the warriors from rescuing the hostages, including Hermione. Inside!"

"Why?" The mermaid was very puzzled.

"I had something to do that day, so I can't let the warriors interfere." Harry's voice gradually became serious, "Someone wants to take advantage of the second round of the Triwizard Tournament to make trouble in the Black Lake, so I need you to cooperate with me." Grindylow, including the giant squid, set up an ambush at the bottom of the lake. Once anyone other than the warrior appears, arrest them immediately!"

"Someone dares to cause trouble in the Black Lake?" Upon hearing Harry's words, Mercus immediately widened his eyes, "Harry, don't worry, we will definitely help you arrest the troublemaker!"

"Thanks in advance then." Harry nodded, just in time to see the long gun that Mercus had placed in the corner of the room, so he made it fly into his palm with a casual move.

After that, he took out the Philosopher's Stone, carefully carved a fine magic circle on the gun body, and then cast a few more spells on it.

"Here, I'll give it back to you. It turned out to be a pure gold tip. It seems that your life has really improved."

"Did you... just do alchemy?" Mercus took the spear in a daze, his expression became incredible, "Harry, you are so powerful now!"

When we met again this time, she found that Harry was really much stronger than before.

Not only can you breathe and talk freely underwater like a mermaid, but you can even perform mysterious alchemy with your bare hands...

"It's not that I'm good, it's mainly because this thing is... a bit evil." Harry glanced at the Philosopher's Stone in his hand, and shook his head hesitantly.

He learned the ancient alchemy from Nicole Flamel, and at the same time Rowena in his mind was once a master alchemist.

However, under their teaching, the more Harry used the Sorcerer's Stone for alchemy, the more he felt that something was wrong.

It's so easy...

The Philosopher's Stone is simply a bug, no matter what kind of alchemy idea it is, it seems to be able to realize it; including the completely unreasonable elixir of life, it can also be made.

Using the Philosopher's Stone for alchemy is completely against the general alchemy rules. Rowena has said this several times.

Equivalent exchange... Nicole Flamel did not mention the basic rules of ancient alchemy.

However, regarding the Sorcerer's Stone, Nicole Flamel did not explain its origin and production process to Harry in detail, including the legendary "Book of Abraham" used as a reference, and he never showed it to Harry. .

Harry felt that Nicole Flamel should hope that he could collect as much information as possible, and then take the initiative to ask him.

And recently, he has indeed begun to feel that something is wrong.

In order to ensure the safety of everyone on his side, Harry has recently produced a lot of armor and alchemy items in a row, among which it is natural to often use the power of the Philosopher's Stone.

Then he suddenly discovered that when he faced this stone, for some reason, he felt an inexplicable sense of guilt.

The more he practiced, the more obvious this feeling became, as if Harry would be sorry to anyone as long as he used the Philosopher's Stone.

"Forget it... I'd better tell you about this gun." Harry sighed slightly, not wanting to dwell on this issue at this moment, and explained to Mercus instead, "You mermaids don't know ordinary magic, and This time we are dealing with wizards again, so I added a little function to your gun. If the troublemaker dares to release magic at you, you can use the tip of the gun to block it, and you can bounce the spell. In addition, if If you swing it hard, it can also cast a sleeping spell that is not bad, and it is a version that can also work underwater."

"So amazing? Thank you so much!" Mercus's eyes lit up, and he couldn't put it down and hugged the spear in his arms.

She also knew that this thing was actually a gift from Harry, in order to thank them for their next help.

Because this gun is not only useful for this operation, but also when she takes her clansmen to explore the outer sea area, the safety will also be improved a lot.

"Anyway, I'll leave it to you on the day of the game." Harry solemnly begged Mercus, "I have some other things to deal with, so I may quietly leave Black Lake on the day of the game, including Kyle, and I will Let others pretend to be me to ride."

The second game was very important for Harry, because he not only wanted to catch the two troublemakers, but also sneaked back to the nursing home along the magic circle under the Black Lake, taking advantage of Barty C. When Rauch isn't in the room, explore the secrets that Winky has hidden!

And after the incidents in the nursing home and the lake were over, he had to return to the match scene immediately to deal with possible attacks from the Ministry of Magic.

In short, he was a bit busy, but Harry believed... he must be the one who won in the end!

Chapter 680 The ninth chapter is not in good condition, let's make a fortune

February is a busy month for Harry, because apart from normal study and abnormal research, he often needs to prepare a lot of things.

Like presents... and presents.

Bang!

"You seem a little absent-minded, is it because of today's day, or is there another reason?"

In the alchemy laboratory on the eighth floor of Hogwarts, Luna, who was using a microscope to help observe snake blood, raised her head and raised her eyebrows to look at Harry, who had failed in alchemy.

A puddle of blood exploded on the alchemy platform in front of the two of them, and many drops of blood seeped into the previously outlined alchemy formation, as if some kind of evil ritual was being performed.

Not only that, the lens of the microscope was already covered in blood, and Luna's face was also splattered with mottled marks.

"I'm sorry... I was a little absent-minded, and of course it's because the difficulty of this cultivation is really high."