The cold water of the lake poured into his facial features from all directions. It was very quiet around him. Soon, he fell to the depth of 20 meters, the light disappeared, and there was darkness around him.

Under the pressure of water, Hoffa's magic quickly began to transform into life to fight against this huge pressure, but he had no other way.

He held his breath, small bubbles from his nose and mouth overflow, suffocation gradually occupied his brain.

In the dark, something touched his back, and in a flash it caught his waist.

Then, a force dragged him straight up.

Ten seconds later.

Hoffa, whose lungs were about to explode, burst out of the water.

He coughed violently.

The cold air froze his hair for a moment, and he lay trembling on the tail of osivia's snake, shaking his head hard, trying to get rid of the cold.

The speed of ice breaking is very fast, and osivia is faster in the half snake state.

Finally, they got out of the dangerous ice zone. Osivia swam sideways to the ice, then quickly dragged Hoffa to the unfrozen ice.

Hoffa shivered and climbed on the ice. This was his first winter swimming in his life. The temperature of more than 20 degrees below zero made his wet teeth tremble, and the difficulty was not enough.

At this moment, in the center of the Black Lake, large areas of ice began to break and fall off. There is a faint mist on the surface of the lake, which looks like a hot spring.

"What, what the hell, this... This... This ice... How to say it collapses. "Hoffa's teeth trembled and shivered with cold. No matter how strong the force was, it was useless in the face of the natural cold.

Osivia did not answer. She quickly drew out her wand and touched Hoffa.

"Remove water and prevent dampness."

Soon, the water on Hoffa's body was sucked away by the magic wand, and his clothes and hair became dry again. He feels much better, but the energy lost by the decrease of core temperature of his body can not be made up for in a short time.

Osivia touched herself again, and the water on her body, which was about to freeze, evaporated quickly.

She looked at the ice in the middle of the lake and frowned.

"How could that be?"

After a while, Hoffa slowed down. He looked at the smoky water surface, turned over and put his hand into the lake. The temperature was about zero. The normal temperature of ice water would not melt the half meter thick ice.

"Is there a geothermal spring in Scotland?" Hoffa asked.

"No way."

Osivia whispered, "look at the edge of the ice."

Hoffa looked down and saw a red thin line carved on the edge of the broken ice. This thin line extended forward. Wherever it extended, the ice broke off.

"It's magic." Osivia said softly.

"Who uses it here?"

Hoffa was puzzled. Looking at the scale of the ice fracture, one wizard could not complete it. At least dozens of wizards had to cooperate to do it.

"I don't know."

Osivia draws out her wand and lights the lake.

Air conditioning converges from her wands, and the lake water condenses rapidly to form a transparent, narrow ice boat.

She held out her hand to Hoffa: "come on, no matter what happens, find the library first."

After boarding the iceboat, Hoffa still trembled for a while, and then the core temperature of his body gradually rose. Fortunately, he had something to eat before he came, and he had a little stock in his stomach.

Osivia ordered some Iceboats, and they glided quickly and silently over the lake where the ice had fallen off.

Before long, Hoffa looked sideways, and they were very far away from Hogwarts castle. Looking back, there was only a vast water mist behind them, and they could not see anything clearly.

Looking ahead, the island in the middle of the lake is now missing.

"Do you remember the direction?"

Hoffa asked osivia that he knew that the student's sense of direction was not very strong. In such a dense fog, he was not sure whether the other party could hold the direction.

"I'm familiar with this one."

After a pause, she added, "when I was at school, I used to swim in the Black Lake every night."

Hoffa exhaled a puff of smoke, rubbed his hands and said nothing.

Due to the inexplicable fall into the ice lake, after boarding the ship, Hoffa's mental field has been in the open state.

After a while, he felt that a group of creatures had entered his perceptual range.

Looking down, there was something swimming in the Black Lake. It was very hazy across the water.

One of the underwater creatures sensed Hoffa's mental field, and it slowly swam out of the water.

At first, there is only a light white dot, and then gradually enlarge. It's an S-shaped curve.

Near the surface, the creature silently flipped over and turned into a backstroke. All over the water, a * * creature came out of the water.She grabbed the edge of the boat and straightened up slowly, revealing a charming girl's face. Her face was dripping with water, lying on the edge of the boat, looking at Hoffa and smiling.

Her brown hair was wet, her chest had some hazy gauze, her bare forearm joints had erect fins, and her clavicle had dots of transparent scales.

Under the dark water, Hoffa could see a huge swinging fish's tail.

It turned out to be a mermaid.

The scene is unspeakably strange.

The mermaid climbed the iceboat and looked at herself without blinking.

Hoffa can see a trace of desire and temptation in each other's eyes. She seems to be silently inviting herself to swim with her.

At this time, a sense of inexplicable familiarity came to his mind, and then Hoffa remembered that it was the little mermaid that wrapped around his fingers and sprayed water on his face when he was in the first grade.

How could it be so big?

"Are you ready?"

The mermaid asked in a low voice.

Hoffa barely heard. He rubbed his ear. "Ah, are you talking to me?"

Osivia frowned at the mermaid and said coldly, "this is not where you should be."

The mermaid looked a little frightened. She looked at Hoffa and whispered, "be careful."

With that, she turned her head and popped into the water. His tail swayed a few times and disappeared into Hoffa's mental field.

Osivia: "Scottish Lake demon, 4x level magical creature. My life span is only 10 years. When I was in school, I used to swim with them. Their saliva is the material of oestrus. If you kiss it, you will be confused and dragged into the water

"How do you know that you have?" Murmured Hoffa.

"No, only low spirited witches are lured by mermaids. And they're not interested in females

Osivia pause, with doubts, said: "something is wrong, the lake demon will not haunt in winter, what happened?"

At this time, the lake narrowed and the ice layer gradually narrowed into a channel.

Hoffa, who had been nervous, saw some moving shadows on the ice in the hazy mist.

He immediately tried to remind osivia, but the other side covered his mouth and motioned him not to speak.

Hoffa's mouth and nose were covered and he could only stare at her.

Osivia took out her wand and knocked on her arm: "Dessler Falcon gate."

Suddenly, she and Hoffa disappeared into the air.

As the fog thinned, osivia stopped the iceboat.

They saw the shadows moving in the fog.

Those creatures are half human and half fish, tall and burly.

It's the lake demon.

But it's very different from the girl Lake demon I just saw.

Although these Lake demons have the same body and tail, they are extremely ugly and ferocious, but they are full of spines. He still had some rusty but sharp anchors in his hands.

Some of them have bent spines and protuberances, holding wooden sticks with barnacles and algae in their hands and sliding them on the ice. On the ice, red lines are carved where they cross.

The ice that just fell off is actually the masterpiece of these creatures.

They didn't notice the two intruders, Hoffa and osivia, communicating with each other in a completely incomprehensible Lake demon language while engraved with red lines.

Looking around, after the fog faded, the surrounding ice was all male Lake demons. The number is at least several hundred.

Hoffa swallowed and felt a little dry.

This scene is almost unheard of by him. Combined with the warning from the banshee, he thought with his toes that these guys must be planning some unknown dangerous plan.

In the Black Lake, his combat power will be reduced by at least 90%. He has no metamorphosis skill that can be used in the water.

Seeing the fog getting lighter and lighter, the lake demons would soon find the two men on the iceboat.

Hoffa looks at osivia, who shakes his head, points to the ice in the distance, points to the lake, and makes a swimming gesture.

Hoffa's eyes widened. He understood what osivia meant. She wanted to swim.

Hoffa pointed to the boat.

Osivia shook her head and pointed to her ear. Wave your hands.

She meant that the sound of the boat would attract the attention of the mermaid.

Hoffa gritted his teeth and nodded.

Osivia didn't hesitate and put his hands under Hoffa.

Immediately, the ice ship under the feet turned into liquid.

They fell into the Black Lake silently, and the endless cold swept Hoffa's body again.

One meter underwater, osivia swayed the snake's tail and dived with Hoffa. They rubbed the falling ice and went under the thick ice.

There was no sound in my ear, only the rumble of water.

The chilling temperature froze Hoffa's brain.He felt that he would have a psychological shadow over swimming in the future.

The craziness of life is always beyond his expectation. An hour ago, he was still eating Christmas Turkey in the school hall. An hour later, he was forked and swam to the bottom of the ice half a meter thick in the Black Lake. The top of the head is indestructible ice, and the foot is an unknown abyss without light.

If ossivia is careless, even if she has a cramp, she and she will die.

Fortunately, the deformation teacher didn't make any mistakes. After swimming for about a minute, she covered Hoffa's mouth with one hand and drew a magic wand with the other hand. She drew a circle on the ice above her head.

The ice ring fell off.

When osivia pushed Hoffa, he jumped out of the water like a seal and collapsed on the ice.

At this moment, Hoffa's face was pale, too cold to speak. His teeth and bones rattled.

He forced himself up, pressed the ice and started doing push ups crazily. While pushing up, he turned on the activation state. Constantly repairing the body's frozen cells.

Osivia climbed out of the ice cave, her condition was not much better, her lips were purple with cold, her fingers were holding her wand tremblingly, and she nodded on herself, and then on Hoffa. Sucked off the terrible ice water.

Then, holding her shoulder in one arm, she drew a green magic array with her right finger in the air, which was engraved with a lot of information.

After painting, she pressed one hand and the magic circle whirled away in the air.

Then, she was staring at the thick water vapor in the distance.

Half an hour later, Hoffa's brain regained consciousness. The first thing he did was to ask osivia:

"what's the situation and what are the lake demons doing?"

Osivia shook his head: "I don't know. It's very strange. I told Auror of the school to be on full alert. In case of an accident, someone will come to support us immediately."

"Are the Aurors guarding the hunting ground your men?" Hoffa asked, frowning.

"To be precise, some of my father's colleagues in wiesengamo."

Osivia stood up. "It's not too late. Let's go."

Osivia took Hoffa by the arm, and they ran to the island in the middle of the lake.