Inspiration from The Hairy Heart

Sirius always thought he had long since abandoned everything—his brother, his mother, and everything related to the Black House.

In his eyes, James and justice are the most important things.

But now, he was completely unconcerned about the secret of Voldemort's immortality, which was right before his eyes.

All he wanted to know was why his brother had lost his life.

Instead of that annoying House-elf Kreacher.

As a servant, why didn't he die for his master?

"It's Master Regulus! He ordered Kreacher to stay away from him and to retrieve the Locket and destroy it!"

"Don't tell your family anything about the cave!" Kreacher cried, clinging to Regulus's cold leg.

"Why aren't you misinterpreting my brother's orders now!"

"I'm going to—I'm going to kill you!" Sirius's face was contorted, his handsome and aloof demeanor completely gone.

He drew his wand and pointed it directly at Kreacher's thin heart.

Kreacher, on the other hand, stood tall with his chest puffed out, looking at Regulus's seemingly sleeping face as if he deserved to die long ago.

"Sirius!" Lupin grabbed Sirius's right hand, which was holding the wand, and tried to take it from him.

"This has nothing to do with Kreacher."

"Kreacher can't misinterpret the orders of his favorite master!" Harry said.

He stepped forward and blocked Kreacher's path.

"Don't you want to know why Regulus died?"

"Was his death worthwhile?" Draco suddenly asked.

Upon hearing these words, Sirius felt as if his bones had been removed, and he suddenly slumped into Lupin's arms.

"Regulus died because of the Locket."

"The Locket is hidden on a small island in a cave, placed in a stone basin. The only way to get it is to drink the Potions in the basin."

"That Potions can make a wizard lose his magical abilities, fall into pain, and then feel as if his internal organs are on fire, making him want to drink water."

"And the island where the Locket is hidden is also protected by a magic that can remove all water from the human body. Aguamenti, or any water you carry with you will disappear."

Harry paused briefly, then added, "This was determined by Ron and Draco's tests."

"In the end, the wizard who drank that Potions could only go to the lakeside, which eventually attracted the army of Inferi in the lake."

"They were pulled into the water and drowned, eventually becoming part of it."

"We and Kreacher retained our magical abilities because we could go directly to that island and didn't need to drink Potions."

"The Inferi weren't too difficult for us, and since Regulus's body was definitely not far from the lake, we found Regulus in no time." Harry briefly recounted the island and everything they had done.

"Thank you, Harry, for bringing back my brother's body."

"But why did you go alone without telling us?"

"That's how I missed the adventure of bringing my brother Regulus back!" Sirius sighed, while Lupin next to him looked at Harry and the others with an expression that said, "They're too daring."

"Could you tell me the story of the Hairy Heart?" Sirius asked Ron gently.

He was rebellious from a young age, and the Black House didn't seem like the kind of family that would tell fairy tales.

He wanted to confirm one thing: whether Regulus's death had been worthwhile.

If this Locket is just a Dark Magic item, that would be ridiculous.

Ron clearly hadn't expected to become the center of attention. "This story actually has nothing to do with immortality."

"He was talking about a wizard who made a mistake—separating something that should obviously not have been separated—the body and the heart."

"This clearly violates the first Fundamental Laws of Magic: anyone who arbitrarily alters the deepest secrets—the source of life, the essence of the self—must be prepared to bear the most extreme and dangerous consequences." Ron's ears turned slightly red.

He was simply inspired by this story, but it doesn't really have much to do with the Locket's design.

That's why he didn't tell the whole story.

Sharing stories that others don't know has always been Ron's favorite and most cherished activity.

However, Sirius was not disappointed. Unlike Harry also connected Ron's clue to the idea of splitting life to remain immortal, Sirius was different.

Despite his dislike for Dark Magic, Sirius came from a family with a strong background in it, was still exposed to it extensively. The first thing that came to mind for him was the most evil form of Dark Magic — Horcrux.

Just like his brother, he analyzed Voldemort's behavior and deduced the secret of his immortality.

Sirius was a little confused, because this kind of magic was described in "The Advanced Dark Arts Unveiled," which even explained in detail how to create it.

This book may be a secret to Muggle-born wizard, but as a spell created by Herpo the Foul, the most famous Dark Wizard, it is not a particularly sophisticated or well-known spell within Pure-blood wizard families.

He is simply evil, and no one would want to use him.

Splitting one's own soul, as a wizard who knows about the Afterlife, is not considered a wise move.

Would Voldemort really use such crude, irrational magic?

Sirius hesitated. He worried that he might be mistaken.

Sirius was completely unaware that Voldemort's entire knowledge came from Hogwarts.

He wasn't as knowledgeable as others thought.

He boldly and ignorantly created several Horcrux.

His strength stemmed solely from his unwavering belief that magic was everything, and his Transfiguration his own magic.

"Ron, your story is very useful." Sirius remained silent for a long time, then casually Petrificus Totalus his struggling younger brother.

"Sirius, Regulus, what are you going to do?" Lupin asked after a moment's hesitation.

"Remus, you haven't forgotten my last name, have you?"

"I am a member of the Dark Wizard family Black House wizards."

"The Inferi are the most commonly used servants of Dark Wizard."

"I only need to look up the relevant notes of any of my ancestors to easily become his master."

"Regulus will become a member of our family."

"There's no need to worry about the Ministry of Magic. I just need to make a report. The Black House has plenty of Galleons," Sirius said, trying to sound strong.

He drew his wand, and a silver plate appeared out of thin air. Fragments of the Locket flew out from the corner and landed in the plate.

"Sirius, my dad is in charge of confiscating Dark Magic items."

"Just talk to him about it," Ron said.

Although Sirius's Galleons had nothing to do with him, he still felt sorry for him and found a solution for Sirius.

"What's this?" Harry looked at the fragments of the Locket.

"I just feel that I need to talk to Dumbledore about this prop of Voldemort's; I have something to confirm."

"Regulus' death must have been worthwhile," Sirius sighed.