Harry was trying his best to convince Arcturus, saying confidently, "I'm not scared. I believe I can do this. We could ask Emma or Grandma Cordelia to keep an eye on us. If something starts to go wrong, they could step in and save me."
Arcturus replied with concern, "I get where you're coming from, Harry, but you need to realize we're dealing with something very delicate here: the soul. Neither I nor anyone else I know has enough understanding of how magic affects the soul. The method I've suggested is safer than most, but it's still not completely reliable or well-tested. There's no way I'm going to experiment with this, especially not on an eight-year-old boy."
Harry tried to push his point further, but seeing that Arcturus wasn't going to budge, he proposed an alternative, "What if Sirius tries it? It might be good for him."
Sirius, caught off guard, questioned, "You think I need to get stronger, Harry? Just so you know, I'm considered one of the strongest in the Auror department."
Harry explained, "Sure, you're strong, Sirius, but against Voldemort, your strength isn't enough. Plus, sometimes you rush into things without thinking. Maybe having a stronger soul could help you think things through better."
Sirius, with a hint of humor, responded, "What, you think I'm a fool now?"
Harry replied, "It's not about being smart or strong enough; it's about being even stronger to protect your family. I'd try it myself if Grandpa Black wasn't so worried about the risks involved."
Arcturus cut in, "Harry's proposal has merit. It could be precisely what you need, Sirius. And you can't deny your intelligence. Your pranks at Hogwarts, particularly the one that nearly harmed a Slytherin student, speak to your cleverness."
Sirius, begrudgingly accepting the plan, said, "Fine, I'll do it. But for the record, I'm doing this not because I think I'm lacking. I just don't want Harry to take unnecessary risks."
With the decision made, they prepared to proceed with the experiment, hoping it would not only bolster Sirius's abilities but also provide a new way to combat the dark forces they were up against.
Arcturus beckoned his house elf, Vardey, to retrieve a specific tome from his vast collection. Vardey soon came back, holding a book that seemed to almost breathe with a foreboding presence, its title "Magick Moste Evile" etched on the cover. When they opened it, a disturbing sound filled the room until Arcturus quickly silenced it with a few whispered words.
Harry, who was watching everything closely, couldn't help but ask, "That book delves into dark magic, right? Is Sirius about to perform dark magic? Are you sure it's safe?"
Arcturus responded with a calm, "Yes, the spell we're considering comes from the realms of dark magic. But, Harry, remember that the nature of magic isn't black and white. It's the intention behind its use that matters most."
Arcturus explained further, "The way we categorize magic into 'dark' and 'light' is just something people came up with a long time ago. It wasn't about good versus bad. Sometimes, people use what's considered 'light' magic to do bad things, and 'dark' magic can be used for good reasons. The reason I'm using this book, which is full of dark magic, is because spells that deal with the soul fall under that category. But don't worry, you'll get to understand all these differences as you learn more. For now, just know that we're not doing anything wrong, and Sirius will be fine."
Harry felt reassured by Arcturus's words and nodded, showing he understood and trusted him for the moment.
Then, Arcturus took his time to carefully teach Sirius how to do the spell. Harry paid close attention to this teaching as he wanted to learn the spell too. Many more Horcruxes were waiting to be found by Harry and Harry needed this spell to safely dispose of them while strengthening himself.
As soon as Sirius felt ready, having practiced the spell thoroughly, Arcturus proposed they bring Kreacher in to be part of this momentous occasion.
Kreacher arrived, visibly moved by the prospect of witnessing the fulfillment of his beloved Master Regulus's final request. His small form trembled with emotion, and tears welled in his eyes, reflecting his deep connection to the Black family legacy.
They moved to a room that Arcturus had set up just for this purpose, where the cursed locket was placed carefully on the ground, center stage for what was to come.
With a strong voice, full of resolve, Sirius initiated the spell.
From his wand burst forth a brilliant white light, wrapping around the locket, engaging in a silent struggle against the darkness sealed within it. After a tense moment, a ghostly figure that resembled Voldemort appeared from the locket, screaming in defeat before it was completely consumed by the light, which then receded and flowed into Sirius.
Kreacher, witnessing the locket's destruction and the successful completion of Regulus's final wish, couldn't contain his emotions. He laughed and cried simultaneously, a rare display of joy for the usually reserved house-elf.
Sirius, recovering from the spell's effects, along with Harry and Arcturus, watched Kreacher's reaction. They were touched by his genuine joy and relief, sharing in the emotional release that came with closing a chapter that had long haunted their family.
After the intense moment, Harry couldn't resist lightening the mood. "So, Sirius, feeling any sharper? Maybe we should dig up some NEWT exams to see if you've tapped into some hidden genius," he teased, knowing full well how much Sirius, like many Hogwarts students, had dreaded those exams.
Sirius, with a light-hearted retort, responded, "Very funny, Harry. I don't feel much different, just somewhat rejuvenated."
Arcturus then weighed in, his tone serious, "Don't expect any dramatic changes. The shard of Voldemort's soul that merged with you, Sirius, was minuscule. It's unlikely to bestow any profound powers immediately. The true extent of its effects, if any, will only become clear with time. The realm of the soul is still largely uncharted territory, largely due to the stigma attached to dark magic."
He then turned his attention to the locket, noting its surprisingly good condition post-cleansing. "A few simple spells should have this looking as good as new," he observed.
Harry, always curious, saw an opportunity. "Once it's fixed, could I keep it? There's something about it that fascinates me."
Sirius, curious himself, couldn't help but ask, "And why's that, Harry? It's not like you can just open it."
Harry's reply came with a playful smirk, "Ah, that's for me to know."
Arcturus, considering the request, eventually nodded. "Alright, Harry. Once I've restored it, it's yours."
Eager to see if the soul piece had any noticeable effect on Sirius, Harry led him to test out his magical prowess.
They were both pleasantly surprised to find a subtle yet definite improvement in Sirius's spellcasting abilities, particularly with the more complex spells which now seemed to require less effort. It appeared that Sirius had indeed gained a deeper mastery over his magic, a silver lining to the whole ordeal.
When Arcturus finally handed the repaired locket to Harry, he accepted it, already planning to delve into its mysteries when his packed schedule allowed.
The locket, with its rich history and connection to Slytherin, held many secrets Harry was eager to uncover. However, with his current commitments to training and his ongoing projects, Harry decided to shelf his curiosity about the locket for the time being, focusing instead on the tasks at hand.