Disclaimer:

I solemnly swear that the literature and works of the Harry Potter Verse belong to JK Rowling, Bloomberg and Warner Bros. The only thing I own are the one-shot ideas that popped into my head and whatever OCs I would create for them. This is a work of pure fiction made solely for fun, constructive reviews will be welcomed, flames will be ignored. Any references to characters in real-life or fiction are purely coincidental. If I could make money out of my ideas, it would be nice...

Mischief Managed Damn It!

Title: The Potter who became Unrivaled in Reality after Training in Another World (Working Title)

Posted Date: May 1 2023

Tags: OP Harry, Isekai Fantasy World AU

Common HP Plot Tags: WBWL, Bad Potters, Bad Sirius Black, Manipulative Dumbledore, Multiple Lordships, Harry x Multi

Possible Challenge(s): Alternate School created to rival Hogwarts, some HP characters come from different world.

Not to be used: Harry going to Dursleys, Harry becoming a "Yes Dumbledore" man, Harry going to Hogwarts for education

The young boy sat himself gently on the ground, hissing from the pain shooting through his body and the broken arm. He was alone in a small corridor of a house that he just entered, and he could tell that he would need some healing to be done.

But he was safe, that was what was important. And was it not a sad thing to think that way for an eight-year-old? With a sigh, Harry Potter leaned his head back against the wall and thought of all that had happened.

Before all of this, the Potters were a happy family. Neither child was overly favored by either of their parents. He had a godfather, Remus Lupin or Uncle Moony, looking after him, while Uncle Padfoot or Sirius Black was the godfather for his brother. He also had grandparents looking over them so that helped.

But now, after the events of the year 2000, ever since the fateful night when the Dark Lord Voldemort attacked Godric's Hollow, and killed their nanny along with mortally wounding Remus, everything had changed.

When the "Great" Albus Dumbledore proclaimed that Damien Potter was the Boy-Who-Lived, Harry soon found himself a secondary thought to his parents and his honorary uncle, and shortly after that, he essentially become a piece of furniture that was in the household, seen but ignored at best, or in the event he was actually acknowledged, looked upon with derision if he were to "interrupt" their bonding with Damien. Whatever bouts of magic he did was attributed to Damien, and whatever grades he got was forgotten in the face of Damien's achievements, whatever minor they would be. He would have hoped that Sirius Black would remember him, except the man was too busy teaching Damien pranks that more than not would be directed at Harry, with whatever complaints ignored.

Remus Lupin unfortunately passed away shortly after the attack due to complications in the recovery process, not helped that people were still leery about helping werewolves. On the day of his will reading to which he was invited by name, Remus was genuinely happy to be chosen as Harry's godfather and enjoyed looking after him, and granting him much of his accumulated fortune and books while bequeathing the remainder to James, Sirius, and a few others on the list. In a separate meeting with Lupin's account manager, Harry was surprised that he was named the primary beneficiary of his vault and granted certain items that could help him with his current situation. There was also a personal letter that had talked of the man's regrets in the short period that he hung on after the attack as he watched his friends digress to the current state, and he hoped these measures would help Harry.

Only his grandparents Fleamont and Euphemia were there for him, along with Arcturus Black whom Harry saw as a second grandfather. Even the house-elves were there to cheer him up when his parents were out and about to bask in the limelight of his brother, and it said something that Tippy, his personal elf that normally had good restraint, let out some choice vocabulary at their actions that got the Potter elders looking shocked and Arcturus looking mildly impressed at the combination of words. His loneliness got temporarily lifted when a new member of the family came when he was five, in the form of a little girl named Camillia Anne Potter. Harry grew attached to her as he took care of her needs with aid from the elves, a sad fact that even her birth seemed to be barely considered on their radar.

Harry kept up his studies in both magic and muggle studies, having the bad feeling that things were going to get bad really quickly. Not helped when the wizard Dumbledore had been coming around a few times with those twinkling eyes that sent chills down his spine the few times he laid eyes on Harry. And there were increasing numbers of arguments between Fleamont and James on how the latter was not performing his duties as the future head of the family or how he was letting someone else dictate family matters that were private.

Then things fell apart.

Euphemia passed away around his seventh birthday, falling to an illness that came about despite having treatment from a failed attack by the Death Eaters. Fleamont was heartbroken at that, with Harry and Arcturus trying to cheer him up. James appeared to be coming out of it when attending the funeral, only to go back to showing off Damien with increased energy. Then a year later, Fleamont passed away in his sleep, leaving Harry's heart aching at the loss of the one who had taken care of him. Even his little sister knew something was wrong and tried to comfort him despite being too young to understand.

Arcturus set up the funeral, something that should have been done by James if not for Damien monopolizing his time and Dumbledore having come about to try something. Harry was in the room adjacent to the guest room when he overheard Dumbledore supposedly giving condolences before trying to get funding for some group called the Order of the Phoenix and asking about his thoughts on moving him and his sister elsewhere to focus on Damien, an act that got Harry angry and Arcturus downright pissed who proceeded to tear a new one into Dumbledore, James and Sirius when the last tried to support the other two. Harry for one could not take much of it anymore and just went with Arcturus back to his home, bringing along Camillia for her safety since he could not trust Lily to do the right thing.

Shortly after the funeral, the goblins sent a letter to him to attend Fleamont's will reading, the first of a three-part reading of his final will to handle the estate and the fortune. That one was private between Harry, the goblin named Sharpclaw who handled the accounts for the Potters, and Arcturus, and the readings were something that surprised the two humans greatly. The second was done again with him, Arcturus, and a select few that was meant to aid Harry in what was to come on the third and final part of the will reading, the more public reading with the different people called to attend the will reading. It was meant to be private with the odd addition of the ICW officer and reporter, yet James in his arrogance called in the Minister, Dumbledore and the reporters from the Daily Prophet to pay witness to his new role as head of the Potters.

Boy, did he make a big mistake on that?

Right in front of the press and the ministry officials, and verified by the goblins, Fleamont Potter quite bluntly denounced James for acting so foolish to the point that the Potter Family Magic had rejected him harshly, and while he bequeathed James and his family a sizeable amount of money to live properly alongside the current manor they were in, Fleamont declared Harry to be his true future heir of the lordship and granted him the entire family fortune along with the small house that he brought Harry over for vacations. He also included instructions to ensure that no one but Harry was allowed to go to the vaults to get the money, and Arcturus Black was to have the custody of Harry and his sister since there was proof of the Potters abusing Harry in different manners.

As expected from that announcement, it was complete pandemonium with people trying to deny the accusations. The goblins took great pleasure in reminding James Potter and the others to remain quiet, along with the proof that Fleamont had been tested for spells, potions and general health before making the will so that no one could contest it, done in an ICW approved facility with different Healers to help the proceedings, along with Unspeakable certified memories from both Fleamont and Harry to facilitate the custody transfer. The goblins and the ICW official in attendance also made it clear that anyone attempting to create bills to take away Harry's inheritance would be considered persona-non-grata to Gringotts and will have their fortunes taken as penalty along with other punishments.

Harry was just glad that grandfather Arcturus was next to him to shield him and his sister from both the loud noises by the people, the questioning of the news crew, and the glares from the Potters. Yet it was the odd calculating look on Dumbledore that admittedly scared him the most.

The boy held back in the bank to settle the last of the paperwork before he left with Arcturus to prepare for his relocation, with Tippy and his sister's elf going along to help with that and to watch over his sister since Fleamont had helped to transfer the contract to the children. After all was done, that was when Arcturus brought Harry to the Potter MAnor one last time to settle his matter.

And that was when the dragon manure hit the windows.

James Potter was there with Sirius Black in waiting, with their apparent master standing a few feet behind them with a "disappointed in you" expression. James wasted no time in yelling at Harry to hand over the lordship and inheritance to him and Damien, only to be rebuffed by Arcturus who forced him back with a quick flick of the wand. While Sirius looked after James, Albus Dumbledore took the chance to play the disappointed mentor and claiming that Damien needed the heirship and inheritance for what was to come, and that Harry and Camillia should either listen to James or to come under Albus's care where he would ensure that no one would disturb. Arcturus interrupted his speech by telling him where to stick his words in a place where the sun would not shine, and that Fleamont made it clear that Harry and Camillia were under his care, and it was useless to play innocent when the proof was taken and verified.

By that point, Harry's belongings were packed and the two turned to make their way when James lost his temper and fired off a spell that was aimed for Harry's back but instead hit his backpack. That still carried enough force to dislocate his shoulder, break the arm and send Harry flying out of the door and to the courtyard where he hit the ground hard. It was just lucky that Harry got the portkey from the goblins to get to the new house that he inherited as he could see James and Dumbledore coming forward to attack and likely subdue the two of them. With bloody fingers, Harry activated the portkey and passed out on arrival, only coming around recently and likely for a few hours given the relative darkness of the room he landed in with some moonlight shining through the sole window. Harry had pushed to move himself outside of the room he was in to see where he was, catching a glimpse of the courtyard before he slumped over from the pain, almost passing out again but willing himself to stay focused on his situation.

Why?

Why do his parents ignore him so much?

Why could his brother get away with all the crap that James and Sirius allowed to be performed on him?

Why have his other relations abandoned him?

Why do all the people just cater to every word of his brother while ignoring his cries for help?!

Why did he have to have all those who cared for him die or suffer for those people?!

Why could he not have a family that cared for him!

WHY!

"Crash!"

The vases nearest to him went flying towards the opposite wall and broke into pieces from the impact, while the furniture started to creak and crack from the torrent of magic that was coming out of him. The sounds though did knock Harry out of his funk and forced him to calm down. That then brought shame to him as he thought of his grandfathers scolding him for losing control. He just wanted to curl up and just stay there, but he really should clean up the place until he could summon Tippy from the main house. With a sigh, Harry slowly got up and made his way to the closest vase that had flown into what looked to be a study room to pick up the piece. He placed his shoulder to brace himself as he bent to pick up one of the bigger pieces when he heard a click and found himself falling down on a flight of stairs before getting the wind knocked out of him when he hit the floor.

"Ow~" Harry groaned at both the pain and his luck. It took him a while to push himself up and look around him, his eyes adjusted to the dark room thanks to the moonlight that was shining through a few of the windows in the far end of the room and reflecting off what appeared to be mirrors and armours scattered about the room. And what a room of wonders it was?

There were paintings that looked like they were done by the most revered of painters in history, statues that reminded him of those from Venice, clothes and armor that appeared to be from all over the world, weapons of various types and every other knit-knack that drew his eye. Harry paused in front of what might be a Rubric Cube if it were done by a jeweler, having different colored gemstones in place of the regular squares, floating on a small pedestal with a card stating that it was from a friend written in his grandfather's handwriting.

"This must be the room where Grandpa stored the souvenirs he brought from those places he visited." Harry muttered remembering the different gifts that Fleamont had granted him a few times outside of his birthday and other holidays. He went further into the room, noting the odd feeling of magic that came off from them. Granted he was still young, but the objects felt more powerful to him than he thought. A brief flash of light drew his eyes to something at the end of the room, and he blinked at the oddity.

"A pair of doors?" Harry moved closer while using one of the mirrors to get more moonlight to that part of the room. Now that he was closer, Harry noted the doors were made of stone and iron with intricate designs of a tree spanning the full height of the doors, with a griffin with wings spread wide and claws out on the left door, and a chimera with jaws wide open on the right. The overall look made the doors look out of place like they belonged to an old castle instead of this room, and he felt strangely drawn to it. He placed his hands on the doors and after a brief moment of hesitation, pushed as hard as he could to open them, his eyes wincing slightly from the pain of his broken arm and the light that came from the gaps of the doors opening.

After his eyes adjusted, Harry peered through the doors and noted the new room that was on the other side. The difference between the two rooms were evident from the start; unlike the modern look of the house that he inherited, this room appeared to belong to a typical cabin in the woods with wood paneling and simple furniture. It was immaculately clean, and there were windows letting in moonlight.

Wait a minute.

Harry looked back into the room he came from before turning around to the other windows. He moved forward to look out of said windows and blinked at the sight of plants and trees growing outside. He was supposed to be underground based on his position when he fell into that storage room, so how did he go outside?

Did he pass through a portal somewhere, or was this still underground with the windows spelled magically to show another part of the estate?

All thoughts of that got interrupted when a sudden shrilling sound went through his ears for a few seconds before it died out. Harry grabbed his head from the suddenness and shook it briefly to clear his ears before looking up. "What was that?" As though in response, a few sparkles of light sprouted in front of him before a blue screen window appeared in front of him with text on it.

Hello. Who are you?

"WWWWAAAAHHH!"

It would be later in life that he could laugh about it, but at the moment, Harry was glad that no one was around to hear him shriek at a high voice or see him fall back into a rack of clothes that dropped on him, the metal pole hitting his head. "Ow!" Harry groaned as he rubbed his head where he could feel a bump forming, before looking up at the blue screen window that was still in the air. "What is that?" At that question, the text on the screen wiped itself away and then new text came about.

New Owner Detected.

Owner's status being added and structured.

Aligning skills to the owner based on current status and age.

You have obtained [Appraisal] Skill.

You have obtained [Language] Skill.

You have obtained [Seeker] Skill.

You have obtained the Title of [Otherworlder].

Information collection complete.

Welcome to the Other World, Harry James Potter.

"What on earth?" Harry blinked as he looked at the blue transparent screen. "Did I knock my head when falling down?"

No, you did not gain any head injuries or suffer any concussion from falling into the room or that hit from the clothes rack. There are however bruises and cuts on your back, along with the broken arm that requires immediate attention.

Harry slowly placed a hand to his head, slowly taking a breath to contain himself. Clearly he was getting overwhelmed by all that had happened and with his injuries, his mind must be getting very unsettled.

No, you are not going crazy from injuries or adrenaline.

"Not helping!" Harry took another deep breath before letting it out. He looked to the door where he entered and stood up to step out briefly to check his surroundings. "It is the same room." He then looked closer at the door and checked the general design. "Is this door a magical portal to another place on the planet?" A window popped up in front of him at that query.

Name: [Gateway to Another World]

Rank: Legendary

Durability: Indestructible.

A magical portal that opens up to another world, irrespective of time and location. No one knows how or why this door exists, even the Ancient Gods have the barest knowledge of its existence. The owner of these doors can obtain abilities to command certain functions pertaining to the user's class set. These can only be used by one user at a time in life, and the [Room] is the only fixed point for the user to go and relax before entering the world.

"Okay, this is weird." Harry scratched his head while looking at the text. "Is this what the [Appraisal] Skill is for? For that matter, why is this being displayed like a video game?"

Display of information and skills are done based on the current forms of information gathering from the host's world. In the past, the display would have been done as a floating scroll, book, spirit guardian and more. The "Heads Up Gaming Window" as you might call it, is based on the modern interpretation of displaying information to prospective owners of the Gateway.

"That explains it." Harry shook his head. "Bear with me on this, I have a very bad day. You are telling me that this gateway is an actual portal to a totally different world to the one I come from. This is like those fantasy stories such as the Chronicles of Narnia?"

Correct, much like the fantasy novel, you have a doorway to a world of wonders as one might say.

+1 WIT Point for calmly assessing the situation.

"Good lord, my life is now a video game." Harry had to palm his face while leaning against the nearest table in the room. A soft rustle drew his attention to the folded parchment that was on the desk. He reached out to open it up to reveal a set of symbols that he could not read. A smaller window appeared at the corner of the eye to show the translation and his breathing hitched for a second at the words. His eyes started to get blurry as he read the translated text.

My dearest grandson Harry,

Should you be reading this letter, it means that I have passed away, unable to show you the wonders of the world you have just taken a step into. It also means to my regret that James has done something so terrible after my passing that you were forced to use the portkey to come to the house I had left for you as part of your inheritance.

It is not your fault, my dear Nepos. I must take the blame for my son's behavior in his early years at Hogwarts and not being able to stop the progress. My beloved Euphemia had hopes that his behavior had ceased when we were attacked by the Death Eaters in the manor, and indeed it seemed to be the case that was further enforced with his marriage to your birth mother and your birth, only for his behavior to return with a vengeance when both you and your brother were attacked by Voldemort, and that blasted Dumbledore bestowed Damien that thrice-be-damned title, driving a wrench into our family. My beloved would pass away with a broken heart at the sight of a man who had no signs of her once loved son. I myself could not help but despair at the possibility of the Potter Family being ruined by one I have the misfortune of being related to, one I had brought into this world by my own hands. I had tried to be firmer on James, but that appeared to drive him closer into the grasps of Dumbledore who would indulge his behavior, and in the process, have another child indoctrinated into his ideals.

And that is why I tried to make amends with you, the child that was neglected by his own parents, abandoned by my own son. I could see how their actions and inactions have been harming you, and I did not want you to suffer more than needed. I made sure that you would not be caught unaware of your family history like your siblings are; I made sure that you understood the true value of our family legacy as your family went about wasting it; and I made sure that you would not forget our strengths and weaknesses like James did. I am also glad to see that your sister Camillia is too young for them to bring into their fold, even if it is a little callous given that she too is being neglected. At least you are being a better protector for her than them.

I could see a spark in you that was ready to come forth like a blazing flame, just waiting for the right moment to come forth. I could see potential to be the protector of all that is good, potential that could bring about the third coming of magic. But more importantly, I saw the heart that could endure against all that seek to hurt you, the heart that could take in those who seek the same companionship. I saw in you what used to be in my son before he threw that away in his pursuit for fame and fortune.

And that is why I am writing this here in the event that my will is being blocked by the Ministry or Dumbledore, although that should not be the case given that I went to Gringotts to file the will and got in touch with my old friend from the ICW.

I, Fleamont Linfred Potter, of sound mind, body, soul and magic, hereby declare that Harry James Potter is my true heir and future lord of the Ancient and Noble House of Potter. I place the entirety of the Potter Family Fortune under his care, to which he will access the full worth upon his maturity. I declare, should the need arise, my heir be allowed to change his name to protect the Potter family from enemies within and outwards with the grounds that he keeps the Potter Family alive. I declare that Arcturus Black, my companion of old, will be the custodian of Harry James Potter and Camillia Anne Potter, until such time that Harry is ready to take care of his sister or until both reach their majority.

I also accuse James Charlus Potter, Lily Potter nee Evans and Damien Alecron Potter, of harming my grandson through abuse, my granddaughter through neglect, and of harming the Potter Line with their actions. With mother magic as my witness, they are henceforth placed under probation until such time they prove that they had changed, or until the time my heir reaches his maturity and obtains the lordship, upon which he will perform the rites to test their worth and if found wanting, disown them of the family magic.

This may not be as helpful as I want it to be, but I hope it will serve you well.

In regards to the hidden room you have found and the gateway to the alternate world, I have prepared a set of instruction guides for you to look through as you take your first steps towards independence. This new world should be a way for you to get stronger and to take on what's to come in the future. It certainly aided me in my time, yet I believe I had only scratched the surface of what could be discovered out there. If all is not lost, my friend Arcturus should be around to aid you with this as he has entered this world before with me in our youth. We pledged to keep this a secret from all who seeked to obtain power beyond measure and to protect True Magic from being abused, a pledge that was apparently necessary based on the actions of James and his medley crew in the years that came, and Dumbledore who seeks to pillage our history, wealth, and family magic for his ill-thought 'Greater Good'. Funny that he would say the same words as the man who nearly destroyed our world before he was struck down by Dumbledore.

Above all else Harry, Dumbledore must not be allowed to know of this secret, I fear what would happen if he managed to get even a glimpse of this. This alternate world that you will likely experience has a type of force that bows to no one, something akin to the Gods of old, and the powers that come forth this world is something that could only be described as legendary, for all of their capabilities to bring about ruin if abused.

I pray, as I write this out, that you would not get this letter, but if so, know that I love you dearly, and I hope that you can forgive this old man for his mistakes. I am glad that I was alive long enough to hold you in my hands, and in turn, I am happy to leave the Potter Legacy in yours. Remember my advice to you, and never lose your heart to the cruelties of the magical world.

Your grandfather in life and blood,

Fleamont Linfred Potter

Lord of the Ancient and Noble House of Potter

Facta ex animo, non verba, probant.

By this point, the floor beneath Harry was stained with tear drops that had leaked out of his eyes. Harry held on to the parchment letter tightly as he dropped to his knees, his physical pains forgotten in favor of the pain that was wrecking his heart as memories of his grandfather resurfaced with startling clarity. How the man looked out for him when his own parents did not do so, how he protected him from his own brother, and how the man still cared even after death. Harry could not do anything else but to cry himself to sleep on the floor itself, but he vowed that he would do what his grandfather would want him to do.

That much he had to do to repay the man who had done so much for him in life.