Hi! I had a lot of fun writing this chapter. It begins in the summer between Harry's fourth and fifth year.

Thanks to dianaanne who left me a nice review.

I have five more chapters already finished, so for the next four weeks I will post one chapter a week. I am french, and I have no beta, so every mistake is my own. If you see one, be spelling, weirdly phrased sentences, or misuse of vocabulary, don't hesitate to tell me. It's the only way I can get better.

Also, if you have an idea you want me to write, share! :-)

Lord of the House

Kreacher hated his master. The one who broke his mistress heart when he run away at sixteen, the one who fought against his House allies in the last war. He despised the blood traitor, who in turn despised him. He spent all the man's childhood trying to save him from himself, going after him every time he did something improper. All for nothing.

Yes, Kreacher hated his master. But he was the last of the Blacks, the last heir, and subsequently the Lord of the Most Ancient and Noble House of Black. He was the master, and his bond asked him to serve him to the best of his abilities.

Watching Mrs Weasley treat him the way she was, she was rapidly climbing on the top three of the people he hated the most. In first place, there was Tom Marvolo Riddle, the one who killed his beloved master Regulus. The Locket, safely tucked in between his bedding, burned his soul every second of every hour. It killed him slowly and painfully that he couldn't fulfil his beloved master's last order. But alas, he tried everything he knew, everything. The Locket still mocked him, as immaculate as the day he got it, at the cost of the life of his beloved master Regulus. Kreacher wasn't crying, oh no, all the tears had dried a long time ago. Instead, he hated Tom Marvolo Riddle, filling his heart and soul with vengeful fury against that wizard who lied to his beloved master Regulus and betrayed him. The fact that Tom Marvolo Riddle tortured Kreacher and tried to kill him also, didn't even register in his mind. No, doing as they wished with house elves was the wizard kind prerogative, after all.

At second place, it was now a toss-up between master Sirius and Molly Elizabeth Weasley. The woman tried to take over his duties. She was also treating his despised master Sirius like an unruly kid, in his own house. Nobody should treat the Lord of the House like that, even more in his own home. It was just not done. She had no right. None. Kreacher supremely disliked Sirius Orion Black, who was only a shadow of what the proud Most Ancient and Noble House of Black had been, but he was the Lord. No one was allowed to disrespect the Lord. And Molly Elizabeth Weasley was an inferior, she should grovel at his feet for his kind hospitality and protection!

So, he acted.

She couldn't get into any room that she hadn't been explicitly allowed to by the Lord of the House. Even the loo. She had to ask, every time.

Still, she kept berating the Lord of the House about the cleanliness of those rooms. She wasn't the owner of 12, Grimmauld Place. It wasn't her place to comment on it. It wasn't her place to take on his duties, and to force children to work like common house elves, keeping them from using magic even! She was insulting, and wasn't understanding the lesson at all.

So, she couldn't use any of the Black's utensils in the kitchen either, unless explicitly given the permission by the Lord of the House, every time. The kitchen was the elves' domain, it had always been. Kreacher was the last of the Black's elves alive, his brethren slowly wasting away to death when his despised master was unlawfully imprisoned. He had preserved their head, but he couldn't mount them on the wall, it was his master's prerogative. Still, the harpy was harping on the Lord of the House, demanding things she had no right to. It wasn't her house, he wasn't her son, she had no right to try to control Sirius Orion Black. After a few days, and a lot of cunning showed by his despised master to avoid her in his own home, she should have understood. Still, she didn't learn anything from it. One day, she just brought the content of her own kitchen to keep cooking common food, not the proper refined meals for the House of Black. She hadn't even been properly welcomed into the house by its Lord! She only showed up one day, at Albus Percival Brian Wulfric Dumbledore's prompt, and tried to take control of everything! She couldn't do that, she shouldn't do that! Why his despised master wasn't evicting her? He had to do more.

So, she couldn't interact with any of the furniture in the habitation. She couldn't open a drawer, couldn't take anything out of a shelf, walk without tripping on the stairs, pass any portrait without them talking to her, open a window, pull the curtains, switch the lights… She wasn't welcomed, and it showed. She wasn't the only one though, everyone who were slighting the Lord of the House were experiencing difficulties, depending of the degree of their offences. Severus Tobias Snape had the same restrictions, as Albus Percival Brian Wulfric Dumbledore who walked like he owned everyone. His despised master hated it, he could tell, and was getting exhausted by it. Kreacher couldn't help but twistedly rejoice about it. It was his own fault, after all. All he had to do was to evict those lowly peasants and Kreacher would be free to clean and cook properly. Also, he would have to annul every previous order from mistress Walburga, who forbade him to change anything in the house. This prevented him to properly clean, and was the reason why it was so filthy. It was an ordeal for Kreacher, having orders going against the very reason he existed, but he couldn't do anything about it. What he could do, was to take care of his Lord, as poorly as he was allowed to.

He promised to his beloved master Regulus that he would not go against his brother, the despised master Sirius, after all. And this promise, he could keep. He had freely promised, not been ordered. He wouldn't break his word, the only time he had been asked, as an equal. The late beloved master Regulus respected him, and he would honour him until his last breath.

Then, Albus Percival Brian Dumbledore brought his despised master sworn godson, Henry James Charlus Fleamont Potter. Kreacher listened to him yelling at his friends, horror setting on his face. The Scion of a Noble House had been raised by filthy muggles, kept in the dark about his station and the wizarding world? Albus Percival Brian Dumbledore earned his spot as the second most hated people in Kreacher's mind.

When Molly Elizabeth Weasley tried to force him to share a room with her spawn, while treating him like a lowly child, he spurned to action, once again.

"The heir of House of Black has to have a proper room." He mumbled next to his despised master. "Kreacher should prepare him the Heirs quarters, but mistress forbid him to make any change to the House. Oh, if she could see how the heir of the House is treated in his own home…"

It was hard not to insult his despised master, but needs must be met. He wouldn't let that blood traitor dimwit bossy muddy shrieking banshee tramp upon centuries of traditions!

Sirius Orion Black, who had his shoulders slumped and smelled like alcohol and hippogriff dung, rose his head and slowly put his hair behind his ears.

"Molly" he interrupted her tirade. She didn't acknowledge him. "Molly!" He tried again. She kept going about respecting the adults and trusting Dumbledore. Kreacher couldn't stand it anymore.

He snapped his fingers. Her mouth continued to move, but no sound was heard. Some glint arose in his despised master's eyes. The man looked at him, a faint smile gracing his lips.

"Harry will have his own room. Actually, there is enough room for everyone who wants to have their own, including the twins. Kreacher will prepare twelve rooms. Actually, Kreacher, clean and prepare the whole third floor for the guests, make it safe for children. I am the Lord of the House, my order overrides any previous one you might have been given, understood?"

Kreacher was relieved. Maybe Sirius Orion Black wasn't completely lost and the House of Black wasn't promised to die in shame. He nodded and left the kitchen. He had work to do.

The next day, every people under twenty years old chose their bedroom in the third floor. Except Harry Potter, who had a suite in the fifth floor, with a hidden access from every floor that his godfather showed him, and only him. The despised master also moved in the fifth floor, in the master suite. Kreacher had to redo all the walls and bathroom, but he was happy for it. At last, Sirius Orion Black was acting like a proper Black, even if it lasted for about a minute.

ooooOOOoooo

Harry Potter was amazed. Not twenty-four hours earlier, he was in the shabbiest room at 4, Privet Drive, and now he was looking at the most grandiose bedroom he ever set foot onto. It had a giant four poster emperor's size bed in the middle, with dark blue drapes and bedding. A deep wool carpet laid in a dark wooden floor. The enchanted window, or more accurately the bay window, looked over green forested mountains, as if it sat at its peak. It was breath taking. Two armchairs, of the same deep blue, were around an inviting hearth. The two walk-in closets were hidden behind the wall, on each side. Next to it, a door led to a full bath bathroom, with commodities. The bath could be changed into a jacuzzi wide enough for four. The black shining tiles with gold accents when they reflected the light were beautiful. The ceiling could display the night sky over every property in the Black family. Apparently, they were a lot. On his left, another door gave away to a private living room, also in blue tones and black wooden floor. The same bay window adorned one side. It was furnished with two couches and two armchairs, a coffee table, and chimney. A huge desk, with multiple drawers on each side, and probably secret compartments owned a corner. One of the walls was taken over floor to ceiling by a library where sat ancient tomes and new books, behind the desk. Sirius had asked Kreacher to remove any portrait, so he could hang what he wanted in their place. Harry didn't think he needed to add anything. Truth to be told, he hadn't anything to hang on the walls. Maybe his firebolt over the chimney?

He was flabbergasted. His suite was big enough to fit a flat in it. He never thought this shady dirty house could hide something like that. Sirius told him that he just discovered that Kreacher couldn't clean it properly for a decade, but it would change now. Last night, Harry had slept with Ron, so Kreacher had time to prepare the suite. Sirius had his own next to him, clad in Gryffindor's colours. The elf seemed very sour when he was asked to do it, but he complied without even insulting him. Sirius had frowned at that. When Harry asked him why, Sirius explained that they weren't very friendly to each other, due to too many bad memories in this place. Harry could understand growing with bad memories. He shrugged, and told him that they could make better ones. The smile his godfather gave him lift up his spirit, after a whole month at the Dursley's, full of nightmares, hunger and fear about the present and future of the world. For the first time in his life, he felt home. Hogwarts had been his home for the past four years, but it was not the same. Here, he had a home, a home freely given to him, and him alone. Sirius didn't ask anything in return. He told him that he would speak about things with him, and then Harry would do what he wanted with them.

Mrs Weasley didn't want him to learn anything, saying he was a child. So, Sirius, tired of arguing with a troll, just answered all of his questions at night. He loved him for that. Finally, someone wasn't treating him like he was a toddler, while also praising him when he dealt with situations they should have been taking care of themselves, as they were the adults.

He was there for over a week now, and it felt good. He spent most of his time with Ron, Hermione and Ginny. They felt bad, leaving Ginny alone. The twins were mostly doing their own thing. Molly was beyond furious that Sirius had given them full access to a potion lab for their experiments, but she had no say, as it wasn't her house and they were of age. They had a suite in the fifth floor too, the last one available.

A book had appeared on his desk that morning. He was engrossed in it. It described the role of the Houses, how they earned their titles, and how they shaped the wizarding world. It was very well written and interesting. History hadn't been his cup of tea since he set foot in Hogwarts, but this book showed there was more to learn that Goblin rebellions. A lot more.

ooooOOOoooo

Kreacher was happy. He could clean the house. Finally! Molly Elizabeth Weasley was still cooking, his master had explained to him that she needed something to occupy herself. Kreacher reluctantly agreed. If she was to stay here, she had to be useful. She could use the kitchen, and the whole first and second floor. She had access to her underaged children's rooms, but nothing more. She couldn't get to the potion's labs, in fact she didn't even know where they were. Master Sirius Orion Black, Harry James Charlus Fleamont Potter, Hermione Jean Granger, Frederic Gideon Weasley and George Fabian Weasley quarters were out of her reach. She was furious about it. Kreacher loved it, and never missed a chance to mumble about cleaning them when his path crossed hers. His master had forbidden him to use derogatory words in his guest's presence, but there were other ways to show his displeasure. The Weasley's twins had seen through his strategies, and given him pointers. He liked those. They were mischievous, but they didn't outreach their welcome, and never disrespected his master and heir. They were true Slytherin, actually, hiding in the Gryffindor's den to better outsmart them.

Master Harry was reading the books he put in his suite, and asking questions about it to master Sirius. That his friends also read them bogged him, but they weren't really family secrets, and if it was what it took so he learned how to be a proper heir, Kreacher would do with it.

He hoped his master would start to use his status to exterminate Regulus' killer.

ooooOOOoooo

September first had come and gone. The young were at Hogwarts, and their parents were back at their house. Kreacher was happy to see Molly Elizabeth Weasley and her spineless husband leave. Remus John Lupin, Nymphadora Vulpecula Tonks, William Arthur Weasley, Charles Septimus Weasley, Fleur Isabelle Delacour, Marielle Rosemary Wren and Angus Marwen McGonagall were now permanent residents. His master had opened his house to old friends, family, and allies in the coming war. He was getting healthy, and training to fight with his guests. Albus Percival Wulfric Brian Dumbledore, who asked if it was necessary, couldn't drink any beverage without a bitter aftertaste afterward.

Sirius swore this house hated blood traitors and he couldn't do anything about it, when those little unfortunate events kept occurring for those treating his master badly. He never acknowledged they were Kreacher's doing, but he never forbade him either. Yes, his master could be sneaky when he wanted. Like a true Black.

One evening, his master and permanent guests were working on subduing Fiendfyre in the basement. Kreacher felt the cursed magic from where he was in the house. He popped next to master, to observe what was happening. Not ten second later, he popped back with his most precious possession, his only possession.

"Master can destroy this?" He asked, hopeful. His beloved master Regulus had asked him to destroy it with every means necessary. He felt the cursed fire magic, they were the closest thing he ever encountered that could potentially fulfil his beloved master last order.

"What is that? And why do you want it destroyed?" Master Sirius asked. That there was no intended malice in his words was a testament to the evolution of their relationship over the last months.

"It is a Horcrux. Master Regulus asked me to." Kreacher answered, to the point. He was impatient to see it burn.

"Holy shit!" guest William Arthur Weasley exclaimed, snuffing out the Fiendfyre in the middle of the room.

"Putain de merde!" shouted guest Fleur Isabelle Delacour.

"Fuck!" yelled guest Angus Marwen McGonagall.

Master let go of the locket hanging from his hands. It reeked with black magic, and seeing the reactions of two curse breakers and a prodigy in runes, was all the information he needed to be wary.

"What is a Horcrux?" master asked, and at the same time guest Angus Marwen McGonagall demanded "Whose?"

"Master Regulus told me it had a piece of Tom Marvolo Riddle's soul in it. Regulus wanted to destroy it, and he died!" Kreacher broke down. He started to cry and to bang his head on the floor. His beloved Master Regulus had forbidden him to show it, and talk about it to anyone, but he had also ordered him to destroy it with any means necessary. Master Sirius was a mean to destroy it. The conflicting instructions were wreaking havoc in his magic and psyche.

"Kreacher, I order you to tell me everything you know about this locket, and about Tom Marvolo Riddle." Master Sirius said, with his most commanding voice. "This is your Lord's order, it supersedes every other order ever given to you!"

Kreacher opened his eyes. Blood was pouring from his forehead, mixing with his tears, staining his otherwise immaculate pillowcase.

His inner magic calmed down, settled by his master speech. Tears kept escaping his eyes though. He has lived for so long, with a secret so big it ate at his soul and his body, unable to fulfil his beloved master dying wish.

He spilled the whole story in details. Regulus entering the Dark Lord service. His discovery of what it really entailed, the violence, the gore, and his horrors at what he was witnessing and forced to do. Regulus had confided a lot in the little elf, the only being who wouldn't denounce him to the Dark Lord or laugh at his face.

Kreacher talked about the Dark Lords need for an elf, and Regulus offer of him. He described the cave, and the awful beverage that made him see horrific things. His escape, because master Regulus had ordered him to come back home. His slow recovery, and Regulus's fury at his Lord for the casual attempted murder of his elf. He detailed master Regulus researches, his discoveries of the Dark Lord's origins and his quest to be immortal. He told about Regulus' doubts, seeing so many purebloods die serving or opposing a half blood. Then, they went back to the cave and Regulus discovered what Tom Marvolo Riddle had hidden there. Regulus went mad. He forced Kreacher to make him drink the potion, the awful potion, even when master was screaming and begging to be released from its torture. He ordered Kreacher to put a fake locket in place of the original one, and to flee. Kreacher saw master be taken down the lake by Inferis, and felt his life and magic disappearing. He had tried so hard to destroy the Locket ever since, but he couldn't.

"Holly shit." Master Sirius murmured when Kreacher, still crying but not bleeding anymore, stopped talking.

"We will destroy it." He swore to the elf. "For Regulus and for everyone Voldemort had ever killed."

Kreacher nodded.

"I want to kill Tom Marvolo Riddle." Kreacher spoke. "But I can't. I can help you. Magic doesn't forbid an elf to help its master." He said fiercely.

"You will." Master Sirius answered.

"We need to be sure he has only one." Guest Angus Marwen McGonagall suggested. "If I recall correctly, in 786 in central Africa, a dark lord made two and his enemy tried to kill him, but they hadn't realised he still had one hidden after they destroyed the first. The guy managed to come back and he wiped out twenty thousand magicals before someone managed to imprisoned him and extract how he did it."

"You can have more than one?" guest William Arthur Weasley asked, his face white.

"Hell" commented guest Nymphadora Vulpecula Tonks.

"Do you know how to see if he had another?" Master Sirius said.

"No. But I can research." Guest Angus Marwen McGonagall's face was hard.

ooooOOOoooo

Guest Angus Marwen McGonagall had read countless books, learned about the foulest magics ever invented, deciphered so many private journals, and contacted many, many people he knew all over the world. He had no luck in finding how to track down the number of Horcruxes one made. So far, only one ever tried to do more in recorded History, but Voldemort was twisted enough to think he could do it.

Master Sirius and his seven guests were using every spare time they had to this sole purpose. They researched, and researched, and trained for combat. Alastor Alexander Moody, Amelia Susan Bones, Peter Patrick Parker, Antonia Arabella McKinnon, Elizabeth Apolline Siobhan O'Reilly were brought into the secret.

They only took a break for the duration of the winter holidays, to celebrate with the children. Learning about the deeds of one Dolores Jane Umbridge modified Kreacher's most hated top 3 again. Molly Elizabeth Weasley only ranked fourth now. Tom Marvolo Riddle, Dolores Jane Umbridge and Albus Percival Brian Dumbledore trumped her. He would see them exterminated.

He would have to talk to the Hogwarts elves. The trick with the sour drinks was a good one, after all. A string of little misfortunes should be good for that toad and the headmaster. They were enemies of his Lord, both trying to undermine him and his heir.

Sometime in April, Kreacher was daydreaming about all of the misadventures his Lords enemies had to experience. Unfortunately, Albus Percival Wulfric Brian Dumbledore was out of his reach. He found a like-minded elf, formerly servant of the Malfoy House, who was more than enthusiastic to make Miss Umbridge's life miserable.

Then, without even realising it, he had the most brilliant idea of his life. Maybe he could ask other elves if they had been in contact with the Horcruxes magic? Surely, they would know! It was so evil, no elf could pass next to it without feeling it! So many houses had dark object in them, but Horcruxes felt so wrong and evil they stood above everything else he ever encountered. And the Blacks were dark, pitch black dark.

Master Sirius agreed that it was a good idea.

In one month, elves all over the world brought them one hundred and twenty-six Horcruxes. Kreacher only had to tell a few that the Locket had been responsible for his master's death, and in a way, it had been, for them to spread the world and bring them the harmful object, their own masters not knowing it. They were sworn to protect their masters, after all.

There were a lot of bodyless souls roaming the world apparently, who did not know how to become corporeal again when they lost their body. Master Sirius and his guest devised a way to know the name of the Horcrux maker. They became expert at Fiendfyre casting, burning them one after the other.

Now, in a corner of the basement, on a mouldy shelf, were the Locket, a cup, a diadem, and a journal with a hole in the middle.

Four. Tom Marvolo Riddle had made four of them. Master Sirius and his guests' opinions were that he went for the number seven, the most magical number. Kreacher had been told everything, so if something happened to them, he could pass the information to trusted people.

In June, master Harry had tried to run to the Ministry with his friends to save Arthur and Molly Weasley, who were supposedly kidnapped by Tom Marvolo Riddle. Kreacher had wasted no time to warn master Sirius, and they avoided a disaster when some Order members showed up there before the teenagers. Thestrals, really. They would have been much faster if they had used a secret passage to Hogsmeade and taken the public floo. But their stupidity had been welcomed that day. The underground cells of 12, Grimmauld Place were filled with some of the most trusted of Lord Voldemort's servants. Only Master Sirius and his guests had any inkling to what happened that day, being the ones who dealt with the situation in secret.

It was a shame to see Bellatrix Druella Lestrange, nee Black, imprisoned. But she had betrayed her House, trying to kill her Lord and serving an enemy of the House. He gave her extra serving at diner though.

Master Harry spent one hour at the Dursley home that summer, before being whisked away by master Sirius and three of his guests, angering Albus Percival Wulfric Dumbledore who could do nothing about it. Master Harry stayed in the fifth floor, out of reach from his hands, for the whole summer. Kreacher cooked for him, Molly Elizabeth Weasley having regained temporary control over the main kitchen.

In July, they learned that Tom Marvolo Riddle's snake had the same evil Horcrux magic, and Kreacher realised that master Harry wore it too.

Master Sirius became crazy. Master Harry was tainted, and they had no idea how to remove it! Killing him was not an option.

When Albus Percival Wulfric Brian Dumbledore showed up at an Order meeting, faintly smelling like the evil magic too, and with a withering hand, master Sirius and his fellow Horcrux destroyers confronted him. Kreacher was not happy with his answers. He begged his master to kill him, but master Sirius said they still needed him.

Dobby stole the halved ring though. Kreacher felt the resurrection stone's pull to revive his beloved master Regulus, but he didn't fall for it. All lies, that magic was all lies. As were the whispers of grandeur and righteousness coming from the wand of Albus Percival Wulfric Brian Dumbledore. They perverted the soul, they were no better than the Horcruxes, worse even. They hid their deed, slowly eroding their wearers mind, eating at their souls, taking their body's life force. He warned his master Sirius about them, and master Harry too. They were no good, and must be destroyed entirely.

Finally, they decided to kill master Harry Potter. They made his heart stop for two full minutes, capturing the lingering piece of Tom Marvolo Riddle soul in a pot chamber with a clever ritual. Then, they restarted his heart again, and the Boy-Who-Lived lived again.

Kreacher was happy. Soon, the first enemy of his Lord would be destroyed. Dolores Jane Umbridge had an unfortunate accident the day before, when she fell in her office and broke her neck. Albus Percival Wulfric Brian Dumbledore would be gone soon too, the curse on his arm progressing slowly but steadily. A pity that the ingredients in Severus Tobias Snape store weren't as potent as he thought, and his restorative potions were weak.

Kreacher couldn't kill any wizard, his magic prohibited it. But waxing floors and restocking potions lab? That, he could do.

In October, Dobby, who still had access to Malfoy Manor, filled every nook and cranny of his former masters' home with a muggle product that master Sirius gave him. He also filled the numerous vases and exposed objects, the unused wardrobes and cupboards, the basement, the soles of Death Eater shoes, everything he could think of.

It had been a lot of product. He didn't know what it was, but master Sirius assured him that it was to make the greatest prank on Lord Voldemort.

At Halloween, two tons of muggle explosive were detonated somewhere in Wiltshire, annihilating an entire manor, its grounds and all his inhabitants. Twenty seconds before, eight wizards and witches were gathered in a basement in London, using Fiendfyre to destroy a Locket, a cup, a diadem, a snake, a journal, a ring adorned with a strange rock, and a white wand formerly wielded by one Albus Percival Wulfric Dumbledore. As he drew his last breath, nothing was left of all those objects, not even a pile of ashes.

On November first, the wizarding world woke with the news that Lord Voldemort had, literally, been blasted of the surface of the Earth along one hundred of his supporters, and that Albus Dumbledore had passed away in his sleep, knowing that he was no longer needed.

All Harry Potter had done to end his parent's murderer was to give his godfather some money so he could go shopping. A substantial amount, to be true, but he didn't care. His godfather needed it, so he happily gave it to him. He never knew that it was the exact amount, to the pound, to pay for two tons of a very potent muggle explosive. Master Sirius and his fellow Horcrux destroyers would take this secret to their grave.

Molly Elizabeth Weasley should have never tried to mistreat his beloved master Sirius. She was now permanently banned from every property of the Black House. No one spat on House Black without consequences.