The terrain at the seaside rose suddenly, and under the scouring of the sea water, a black section was exposed, forming a straight cliff.

The waves hit the reef, stirring up white foam and making a huge roar.

"Bang!"

Three people suddenly appeared on the exposed rocks, two big and one small. One of them was trembling and almost fell.

"Drag you through the apparition is like dragging a mountain, Felix." Sirius said breathlessly.

"Forgive me, maybe I have too many magical objects on me." Felix said unnaturally. There were still more than a dozen Dementors hidden in his ring. These prisoners were crowded together in a small mezzanine, without any magic isolation, so Sirius was equivalent to apparition with a group of people.

They had time to observe the surrounding environment. The black and abrupt cliff, on one side was the sea with surging waves, and on the other side was the winding mountain. Felix looked into the distance and vaguely saw a village halfway up the mountain.

Apart from that, the surroundings were bare and desolate. Apart from the vast sea and rocks, there was no tree, no grass or beach.

Sirius pointed to a reef in the sea water and said, "The entrance to the cave is right below the cliff. We can't see it now. We can Apparate to that rock to transfer..." "

Let's go."

This time, with Felix leading them, they quickly jumped to the edge of a narrow gap below the cliff. When the sea water rolled up and covered their feet, they took a few steps forward.

Soon, the crack turned into a dark tunnel. The rock walls on both sides were covered with sticky mud and were two or three feet away from them. From time to time, they could crush a shell or something similar. There was a salty smell of decay in the air.

"This was brought in by the sea water during high tide." Sirius said, raising his glowing wand and kicking away a fish in front of them. The fish, along with the small stone, crashed into a rock wall that blocked the way. "I cleaned it up before, but it appeared again a few days later."

Felix looked at the rock wall carefully. In the black and white perspective, the dark rock wall was superimposed with powerful magic. He smelled the smell of a strong curse.

It can be seen that Voldemort is very good at magic such as curses.

"I was blocked here. When I asked Kreacher, he didn't know either. When he and Regulus came here, they didn't encounter this wall..." Sirius explained.

"Kreacher, I remember you came here twice?" Felix asked softly, while he was groping for the magic on the rock wall.

"Yes, yes, Mr. Hap." Kreacher said, with a look of fear on his face. "The first time, Master Regulus found Kreacher and said that the Dark Lord needed an elf... It was an honor. Master Regulus asked Kreacher to complete the task assigned by the Dark Lord, and then... go back, go home." "

Kreacher followed the Dark Lord here. He did not encounter any rock walls, but came directly to a large black lake with a boat... There was a stone basin on the island, filled with potion. The Dark Lord forced Kreacher to drink it..."

"Kreacher remembered a lot of horrible things, the memory of being punished, the illusion of being kicked out... His internal organs felt like they were on fire... Kreacher begged the Dark Lord, but he just laughed and let me drink all the potion..."

Sirius was silent. He had heard this story once, and he still felt bad. Felix whispered, "Testing, he was testing his protection measures."

"Kreacher felt that he was going to die, and the Dark Lord abandoned Kreacher and left alone on a boat... But Kreacher remembered the master's order and wanted to go back, home. Regulus found Kreacher, and he was very worried. He hid Kreacher and took care of me alone..."

The house-elf sobbed.

"After a while, Master Regulus came to find Kreacher... At night, his attitude was very strange. I knew that he was very confused during that time, and seemed to be worried about something... The master asked Kreacher to take him to the cave. At that time, we still didn't encounter this rock wall. We got on the boat and came to the island in the lake, and then, then..." Sirius

clenched his fists. He knew what happened next. Regulus drank the potion himself and asked Kreacher to return home. He was not allowed to come back or reveal this secret to the hostess, except to instruct him to destroy the locket - the Horcrux.

Regulus himself was dragged into the water by the Inferi in the Black Lake...

Felix was also moved by this past event. It was hard to imagine that a pure-blood would give up his life for a house-elf, but he was also conflicted. He had once fanatically followed Voldemort and sincerely believed that Voldemort could bring a better life to wizards.

"My brother, Regulus, was still young at the time and believed Voldemort's lies. He was only eighteen years old..." Sirius said hoarsely, "What a... fool."

Water drops dripped from the entrance of the cave, covering Sirius's inhalation. Felix pretended to be interested in the magic on the rock wall, watching it intently, and did not speak for a long time. After a long time -

"Voldemort was quite confident. When he later added the outermost protective measures, he did not check -"

"No, Mr. Happ, Master Regulus forged a locket, a fake one... when he came and drank the potion, he threw it in, and then let the potion cover it again..."

"Well," Felix said softly, "that makes sense. He missed an opportunity to correct his mistake." Sirius asked

: "How should we get through this rock wall? I have tried some magic, but none of them worked. The closer I get, the more the spells are disturbed. You see -"

He pointed his wand at the rock wall, and a very thin spell flew out from the tip of the wand. The outline of an arch appeared on the rock wall, emitting a dazzling white light, as if there was a strong light behind the crack. But soon, the outline disappeared, and the rock was still as hard and thick as before, with nothing on it.

"My opinion is that the rock wall hides a malicious mind - it is a very rare curse that makes visitors pay a price and weaken themselves. Voldemort hopes that we will paint the wall with magical blood. However," Felix showed a sarcastic expression and said contemptuously: "Everything he did was in vain... We have a better way."

Felix took off the ring, placed it on the conch shell beside him, and said gently: "Kreacher, are you willing to help us get through?"

Kreacher looked at him in surprise, "I, can I? I'm just a humble, obedient servant-"

"No, Kreacher, in some ways, you are better than Voldemort."

Kreacher stared, his bat-like ears stirring uneasily, he didn't even have a decent piece of clothing, but someone told him that he was better than the dark devil feared by countless people.

"Are you willing, Kreacher? Do your part for Regulus?"

"Of course! Kreacher is willing!"

Kreacher held out his hand tremblingly, and Felix took it, and then the old, wrinkled house-elf looked at Sirius with an expectant look in his eyes, and Sirius also held out his hand.

The next second, the three of them disappeared in front of the rock wall.