Chinese students at Hogwarts.

The big black dog squatted beside him, dumbfounded. He raised his paws to look at the healed wounds and then looked at the shattered wall.

Am I that powerful? Zhang came to ask if he could do an experiment with some blood, and he didn't believe it when he said black dog blood could break evil spirits.

learned! Let me bleed whenever I encounter black magic in the future!

Zhang Xiao also put down his bowl in surprise. Is the effect so great?

I really want to experiment. My dad said that black dog blood is indeed effective, and it understands human nature. Black dog blood without a trace of hair is more effective.

He looked back at Sirius, the big black dog making the classic emoticon from his previous life.

Well, he is humane, has no filth, and is of the highest quality!

After a rational analysis, this door must be opened with blood. Maybe the effect of black dog blood is not so strong in the first place. It is the combination of the two items that creates such a powerful effect.

Zhang Xiao pinched his chin and kept nodding. This should be a reasonable guess.

But his eyes couldn't help but drift towards Sirius. Research in the past life showed that drawing blood every six months would not have any impact on the body?

If we continue to think for a while and wait until we reach the stone basin on the island in the middle of the lake, and pour the boy's urine on it, will the strange potion lose its effect?

"Oh? Zhang, did you see it too?"

Dumbledore was really curious. Even he took a few minutes to figure out what the series of spells were for.

Although blood is indeed the key to opening this door, is this effect a bit too exaggerated?

"Professor, I actually don't see anything."

Zhang Xiao cleaned the bowl with a new one and said seriously:

"In fact, there is a saying in the East that the blood of black dogs can purify evil, so I gave it a try.

It seems to work just fine. "

Dumbledore was silent for a moment and joked:

"Well, if Tom knew that his curse was broken like this, I'm afraid it would be very uncomfortable."

He shook his robe and strode in:

"Now let's see what kind of surprises Tom has left for us later."

He took the lead and walked into the doorway, followed closely by Zhang Xiao and Sirius, and the three of them lit up their wands together.

Zhang Xiao did not use his own lighting technique. Sometimes the brighter is not always better. For example now, too much light may cause the Inferi to riot.

What appeared before their eyes at this moment was a very strange sight.

The three of them were standing on the shore of a large black lake. The lake was so wide that it stretched as far as the eye could see. Even with Zhang Xiao's eyesight, he couldn't see the other shore in the distance.

Did Voldemort hollow out the mountains or use a traceless stretching spell?

Zhang Xiao prefers the Traceless Stretch Curse, because the larger the space, the better the effect of the Traceless Stretch Curse. With Voldemort's strength, this is not difficult.

This cave is very high, or the top of it is also enchanted, similar to the celestial magic in Hogwarts.

Even if you look up, you can't see the top of the cave.

In the distance, as if in the center of the lake, there was a hazy, green light, reflected in the dead water below.

Except for the green light and the bright light from the wand, the surroundings were completely filled with darkness.

And these rays of light don't seem to be able to spread very far, and the darkness here seems denser and thicker than ordinary darkness.

"Zhang, how do you think Tom-Voldemort will restrict people who find here from going to that island?"

Sirius was about to speak, but suddenly realized that Dumbledore had not asked him, so he had to close his mouth and sulk.

I know, but I won't tell.

"Professor, I can't think of anything. I don't know much about the Dark Lord. The most I know probably comes from the diary."

Zhang Xiao shrugged and said in a complicated tone:

"And the diary sounds a bit like—like a Lockhart fan."

Dumbledore was amused by Zhang Xiao's words, and even felt exaggerated with joy. Perhaps he thought of Tom speaking in a flattering tone with overwhelming praise:

"That's really not Tom's character. Well, let me see what Tom has prepared for the visitors."

So the three of them continued walking around the lake shore.

Their footsteps echoed on the narrow rocks beside the lake.

They kept walking forward, but the scenery around them did not change at all: on one side was the rough cave wall, on the other side was the endless, smooth black lake surface, with the mysterious green light shining in the center of the lake.

Sirius soon became impatient and turned into a big black dog again, chasing his own tail to relieve his boredom.

This is one of the negative effects of Animagus. If you are in Animagus form for a long time, it is easy to unconsciously take on the habits of shape-shifting creatures.

Sirius often transformed into a large dog in Azkaban.

Dumbledore quickened his pace and said softly: "Based on what I know about Tom, I think I have found the place."

Zhang Xiao opened his eyes wide, his Dharma eyes had quietly opened, and he found that something seemed to be exuding from Dumbledore's hands.

It was something intangible, like the hot air on the asphalt pavement under the sun, which seemed to be distorted.

His hand moved slowly through the air, as if he wanted to find and grasp something invisible.

In Dharma's eyes, an invisible thing suddenly appeared with a faint outline, like a pipe or something.

"Yes, that's it!" Dumbledore said happily.

He slowly moved towards the lake, and Sirius didn't know what happened again.

He was watching nervously as the toes of Dumbledore's copper-buckled shoes moved to the outermost edge of the rock.

Dumbledore still held the hand in the air, holding the wand in the other hand, and tapped his fist with the tip of the wand.

A thick green copper chain suddenly emerged from the depths of the lake and jumped towards Dumbledore's clenched fist.

Zhang Xiao found that the chains seemed to be connected to the pipe, and Dumbledore knocked his fist again.

The chain began to slip through his fist like a snake, coiling into a pile on the ground, and the clanking sound hit the rock wall, making a loud echo.

The chain pulled something up from the dark bottom of the lake.

It was a small boat, glowing green like a chain, floating towards the shore of the lake where Dumbledore stood, barely making a ripple.

"How do you know it's there?" Sirius asked in surprise.

"Magic will always leave traces, and there is no need to make such a fuss. As long as you feel it with your heart, you will also feel that something is not normal there, Sirius."

Dumbledore said that with a soft bang, the boat hit the lake shore: "It was a very obvious mark.

Especially since I coached Tom Riddle and know his style. "

"Is...is this boat safe?"

"Oh, I think it's safe.

Voldemort needed a way to cross the lake smoothly in case he needed to visit or retrieve his Horcruxes, so as not to anger the guys he had placed in the lake. "