The song was deep and ethereal, as if it penetrated out of the painting on the rock wall and reached the depths of the soul.

But William knew that the singing was true, not his hearing hallucination.

Soon, the toad crossed the rock wall, and many rough stones appeared around, with spots of stained with algae.

As more and more homes are home, the singing is becoming clearer and grander.

William and Hermione sat on the sofa, looking at the deep black lake, and a very strange scene appeared in front of them.

The place seemed to be the square of the small mermaid village, surrounded by some houses, and a large group of mermaids floated in front of the square.

They are singing in unison, their tails pounding the stones as accompaniment.

It is hard to imagine that a mermaid with such an ugly appearance could make such a beautiful singing voice.

Among the many mermaids, a statue stands: a beautiful mermaid carved from a huge stone.

The statue looks exactly like the mermaid on the rock wall.

Under the leadership of the mermaid leader, all the mermaids bowed to the statue.

It turned out that they were not singing, but praying.

To be more precise, these mermaids are performing sacrifices.

The mermaid leader raised the trident in his hand high. The silver trident was thunderous, like a bright moon.

Thousands of mermaids dispersed from inside to outside, layer by layer, and their tails swayed slightly in turn. Under the illumination of the trident, they shone with golden light, as if they were in a myth.

William suddenly looked up, and there was no idea when a huge vortex formed above the Black Lake.

A head poked out of the center of the vortex, his eyes fell straight on the trident, his eyes were deserted.

William felt it was ridiculous at this moment. Although he could see the other person, he felt that the woman and him were not in the same latitude, nor in the same time and space.

This feeling becomes stronger and stronger.

Moreover, that woman is definitely not a mermaid on the rock wall, she is a witch!

Because she slowly fell from the vortex, she actually held a magic wand in her hand.

She was like a ghost, sliding around the square for a while. Wherever she was, the light of the mermaid's tail became even more dazzling, and the golden color gradually turned into white light, as white as day.

William was stunned. He wanted Mercury to leave quickly, but it seemed that it was not safe here.

At this moment, the Ravenclaw bronze ring hanging on his chest suddenly became extremely hot.

The next scene caught William off guard. The witch stood in front of the statue, hooked her hands slightly, and the ring floated from him and slowly floated in the air.

The witch smiled slightly and said something, but both sides were not in the same time and space. What she said, William couldn't hear, and the witch couldn't get the ring.

The witch sighed slightly, waved her hand in a rather annoyed state, and the ring returned to William's hand.

William held the bronze ring and subconsciously stroked the pattern on the ring with his thumb.

The witch frowned and turned her back to him, as if she was out of sight.

William looked at the other person's back and looked down at the ring. He seemed to understand a little. He was so angry that he was rubbing the ring himself?

It's another Robert, and this ring is not his wife... Ravenclaw can touch it, but Stark can't touch it?

"And, the ring is mine now! Do you have the ability to hit me?"

William began to enjoy his mouth because the other party couldn't hear it.

Hermione looked at William in confusion, not knowing what he was thinking.

She also frowned and pondered at the ring in William's hand. Today's scene was really beyond her expectations, and even more shocking than when she first learned about the magic world.

After all, after entering Hogwarts for so long, she thought she had fully understood the magic world, but now there was another layer of fog.

The witch ignored the ring and waved the wand in her hand.

All the light on the mermaid's tail was pulled, and instantly left the ground, flew up, hovering in front of the witch's chest.

Under the light, the witch shines brightly!

Her wand poked, and two-thirds of the light merged into her body, one-third rushed into the sky, exploded near the vortex, and shot thousands of meteors.

The witch swept into the air, her robe floated, looked at William deeply, and disappeared into the vortex again.

As the witch left, the pressure in the sky gradually disappeared. Only then did all the mermaids dare to open their eyes, and the dim light on their tails was completely extinguished.

The mermaids were all very depressed, only the light of the trident became stronger and stronger, but the light flowed for a moment and gradually disappeared into the halberd.

The mermaid leader stood up and saw William and others on the outside of the square at a glance.

The toad was transparent at this moment, and the mermaid leader could clearly see William.

The old mermaid seemed to recognize him as yesterday's four-person group. It pulled up a trident and signaled the clan members to close the door and let the dog catch him!

The so-called dog is Grindilo, and most of this magical creature has been domesticated by mermaids and become pets.

Without William's words, Mercury directly activated the toad and continued to swim quickly towards the depths of the Black Lake.

In front is a turquoise aquatic grass, several feet deep, which looks like a very dense forest.

As long as you hide in, the other party will not be able to catch them.

At this moment, without any precaution, the toad was caught by something.

Countless Grindellos poked out of the water plants, their long nails clasped the toad tightly, and their pointed teeth were exposed in their mouths, trying to bite it.

Mercury controlled the toad to open his mouth. He didn't know how Lemay changed it with alchemy. The toad actually spit out a coma spell, and countless red lights scattered out and hit Grindello.

The toad jumped high again and was about to stay away from the Mermaid Village.

Seeing that William was about to escape, the merciless mermaid leader waved his trident again.

In the Black Lake, the power of the trident is already very strong, and because of the sacrifice tonight, the power of this weapon is even stronger.

The invisible magic power swept away, and the toad clearly floated in the water, but it seemed to be in mid-air and fell directly.

No matter how Mercury controlled it, the fall momentum was still unstoppable. After falling nearly ten meters, it hit the bottom of the lake heavily, causing mud to surging around.

At this time, in the Slytherin common room, Professor Snape was wearing a mask and directing the group of young wizards who were about to leave school to clean up.

The Hogwarts train departs at 11 o'clock, it's only ten o'clock now, and it's still early, so you can take the time to clean the Slytherin Lounge.

"Hurry up, clean up this fireplace and you can go." Snape said impatiently.

(I think) Snape, who has a serious obsession with cleanliness, always feels that these little wizards are not cleaning it very clean.

At this moment, a deafening clang suddenly came from the location of the skylight on the dome.

The sound seemed like a huge rock hitting the black lake and falling to the bottom of the lake!

The entire lounge was vibrating!

At this moment, the little wizards, including the dean of Professor Snape, all raised their heads, like fish swimming around the bottom of the lake, looking up at the rippling black lake.

Could it be that the meteorite fell to the bottom of the lake?

Wait...that glass... won't break, right?

...

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Chapter completed!