On February 24, Felix was called over by Professor McGonagall just after breakfast.

"Isn't there still some time before the competition?"

"Ludo Bagman wants to see you about the arrangements for the warriors... They are all waiting." Professor McGonagall said hurriedly.

They came to the room next to the Great Hall. A few months ago, the night when the Goblet of Fire spit out the list, the warriors were waiting here.

When they walked into the room, Ludo Bagman was anxiously pacing around, looking upset. Dumbledore whispered something to him, but it didn't seem to ease his worries.

When he saw Felix, Bagman's eyes lit up and he walked over quickly. "You are finally here, Felix. The Minister will bring a lot of guests this morning. You know about Barty's matter. He... Well, anyway, now everything falls on my head."

Felix looked at the six groups of warriors sitting in the room. They were staring at Ludo Bagman with distrust in their eyes.

"Ahem! Let's get started. I've already collected their wands separately." Bagman urged, wiping the sweat off his round face. He pointed to a table where a dozen wands lay quietly on the black velvet cloth.

Felix had no objection, but just reminded: "You'd better stay away..."

"Oh, what? Okay." Bagman ran away, hiding at the door of the room, looking around.

Felix looked at Dumbledore, and the old man blinked, "Felix, I'm very curious about this magic."

"Okay." Felix said, he turned to the crowd, their expressions became more and more uneasy.

"Professor, what do we need to do?" Cedric asked, "Aren't we looking for something in the Black Lake?"

The other warriors had the same expression on their faces. They had long cracked the information of the golden egg and made the correct guess, but things seemed to be a little different from what they expected.

"That's right," Felix smiled, and condensed a colorless and transparent spherical vortex in his hand, surrounded by blue magic like a bright star ring, "But if it's just to find something, it's too simple. The Ministry of Magic has added some difficulty..."

"What's added?" Nona Lebert asked, hugging her shoulders. She and her two teammates were the least dressed among all the warriors. They all changed into light animal skin clothes to reduce the resistance from the water.

Felix shrugged, "You will know."

A strong suction force surged out from the colorless and transparent spherical vortex, and the blue magic like floating silk suddenly expanded. Cedric, who was closest, rushed to the vortex uncontrollably. He was surprised. "Professor"

Felix nodded slightly to him, so Cedric stopped struggling and plunged into the vortex. His two teammates also got in.

After a few exaggerated screams, only Felix and Dumbledore were left in the room.

Felix held up the spherical vortex, and Dumbledore bent over and approached to look at the dozen people in the vortex, and said with admiration: "It's really interesting. You used this magic to catch hundreds of Dementors? It's a pity that I didn't see it with my own eyes..."

"Yes, eliminate them, Principal Dumbledore." Felix emphasized.

Dumbledore did not comment, but smiled slightly. He said happily: "The next step is to randomly put the warriors into the Black Lake. Oh, yes, and their wands."

"I hope they won't be too surprised when they wake up."

...

"Dongdong"

Harry got up from the ground drowsily. The influence of Professor Hep's magic still remained, and he felt a little dizzy for a while. He stood up in a daze, holding on to a thin wooden stick. There was a hazy light around him. He looked at the wooden stick standing on the ground for a few times, and inexplicably felt that it was a little familiar.

"Bang!"

There was another crash. Harry suddenly realized that he was awakened by this sound. He turned his head sharply and reached into his pocket with his right hand to grab his wand, but it was empty. He didn't have time to worry about the whereabouts of his wand. There were more urgent things to deal with.

A huge monster with a spherical body kept hitting the...protective shield in front of him? Harry found it incredible. The space of more than ten feet seemed to be protected by an upside-down bowl. Not a drop of water penetrated in. The light he saw was emitted by this protective shield. He was also familiar with the scene farther away. It was the black rock covered with dark green algae that was unique to the Black Lake.

He didn't have time to think about it. He stepped back a few steps and stared at the monster. It looked at least ten feet long, and its round brown eyes flashed with cruel light (?). With the help of the dim light, he could barely see the colorful patterns on its body and the long fins on both sides of its abdomen that could bend at a huge angle...

Wait, are these fish fins?

Harry looked blankly at the creature in front of him, which raised its pelvic fins, took a few steps back with funny steps, then kicked hard, raising a large piece of mud and sand, and then rushed over like a sharp sword, and hit the thin protective cover head-on with a fierce momentum, making a "bang".

Harry swallowed his saliva. No matter how he looked at it, he felt as if he had seen this creature somewhere. If it was shrunk by a dozen times, it would look very much like the ball fish he had seen in the Black Lake...

It was a spherical fish with patterns on its body. The biggest difference was that the ball fish had two long legs with webbed feet on its legs, which could walk on the bottom of the water and move quickly in the water.

This magical animal usually lives in deep lakes and patrols the bottom of the lake to find food. Its favorite is water snails.

He and Ron and Hermione found this creature when they were wandering in the Black Lake. Hermione told him that the ball fish had a bad relationship with mermaids. Once discovered, the mermaids would tie their slender and strong legs into a knot and pull them away with their tails. These colorful fish tied by their own legs had to drift with the current until they untied the knot and could return, and this process could take several hours.

This kind of creature could not be seen near the mermaid tribe. Harry at least had a rough guess about his location.

"Did the professor cast a spell to enlarge the creatures in the Black Lake?" Harry muttered, and then he suddenly thought of something and turned back so fast that he almost sprained his neck. Harry rubbed his neck in pain and stared at the wooden stick standing in the center of the protective cover without blinking. A small part of it was inserted into the mud and the surface of the exposed part was very smooth, as if it had been carefully polished. Harry felt a little familiar before...

But now he was very sure that it was not a wooden stick, but his own wand. Harry's brain seemed to be rusty. It took him a long time to realize a fact. It was not the colorful fish that became bigger, but he himself shrunk, shrunk by more than ten times.

The professor used his weird magic that could suck people and Dementors in! Everything that had happened in the room next to the Great Hall came to Harry's mind, making him confused. He stared at the transparent snail shells near his wand. Well, he almost understood why the colorful ball fish was chasing him so relentlessly.

...

On the shore of the Black Lake, on the temporary seats, people stared at the huge curved projection screen. The screen was divided into three rows and six columns. Each vertical column represented the same team, with a total of eighteen squares. Clear images flashed on each square.

On the first square of the second column, the ferocious appearance of the colorful ball fish constantly attacking the protective shield was watched by everyone.

Ludo Bagman sat on the high podium, his head turning quickly, capturing the progress of the warriors, and explained,

"Don't worry, the protective shield can last for an hour. Now all the warriors have woken up, they must figure out the situation as soon as possible, and have an hour to adapt to the chaotic magic and successfully cast a spell to protect themselves in the Black Lake, otherwise they will be transformed into hostages, and the difficulty of the entire team's clearance will increase dramatically..."

The rows of seats closest to the podium were filled with invited guests. They were very surprised by the big screen in front of them, and couldn't help but discuss in a low voice, repeatedly mentioning the "Future World" company that has been very conspicuous in recent times.

Behind these people was a group of dark students, who looked at the screen excitedly and whispered to each other.