Author Notes:

Hello and welcome to my first story,

I've been thinking about making this for awhile now but have not had the time to actually sit down and write. As this is the start of my first ever story I would implore you all to read with an open mind and be kind when commenting please and thank you.

This story will be a Harry Potter x Lucifer crossover (Based on the Lucifer television show), I do not own Harry Potter, nor do I own the rights to Lucifer, those belong to J. K. Rowling and the creators and writers of Lucifer. Once more this is my first time writing and would like to do this more. So again, I do not own anything except my own ideas.

P.S. There will be slight language and some slight violent scenes (crime scenes) but nothing in too much detail. You have officially been warned.

Chapter 1: Discovery

'It's been a month since Sirius had fallen through the Veil in the Department of Mysteries, and month since that silly fool Dumbledore spilled the prophecy and I'm still kept locked up here like some rabid animal,' thought a distraught raven haired, emerald green eyed 15-year-old Harry Potter fiercely. He had just lost his godfather, the closest parent-like figure in his life. He was sent back to his magic hating relatives, the Dursleys for the summer holiday again, with nothing more then a pat on the head, a well-done, and an "I'm sorry." To make matters worse, his two best friends, Ron Weasley and Hermione Granger, weren't talking to him either; he knew that they were injured at the Department of Mysteries, but a whole month, that annoyed him. Harry also knew the he was being constantly watched at all times. That really made him mad.

"Huh, would have thought that they would be more discreet, what with Moody always yelling 'Constant Vigilance!'" Harry quietly mutters to himself. "Fat load of crud that did," he says even louder.

"Boy, get down here now!" his uncle yells from downstairs.

'What does that waste of space need now,' Harry thinks as he slowly rises and looks around his too small room. His first and most loyal friend, Hedwig, sits on her owl perch looking at him curiously, then looks away. "Coming, Uncle," he shouts back downstairs.

Harry leaves his room and slowly walks down the stairs where he sees both his uncle Vernon and his aunt Petunia sitting at the kitchen table, waiting for him with a letter envelope on the table in front of them.

"It's about bloody time boy!" his uncle exclaims loudly.

"Well I'm here now Uncle, what do you need me to do for you," Harry asks him with a slight uncaring tone.

"Don't you dare take that tone with me boy, your freak friends don't scare me," snarls uncle Vernon.

Seeing her husband and nephew begin to get ready for an argument, she decides to end the confrontation before it gets to out of hand. "Vernon, dear, how about you go and take Dudley to the shops?" she asks/orders her husband in a stern voice.

Harry is slightly confused at how his aunt has just spoken to his uncle, and as he looks at his uncle he sees that his uncle is just as shocked as he is at what his wife just said.

"B…But Pet, he…he might try something, you know, freakish," his uncle weakly tries to argue. Petunia just looks at Vernon with a raised eyebrow. Vernon looks down at the table, mumbles something that no one could hear, then gets up and leaves the kitchen. Harry hears some rustling as well as some muffled voices, then a door opens and closes. Harry is now nervous and slightly worried; he wants to know what his aunt is up to and what the letter is.

"Harry, sit down please," his aunt softly tells him, this shocks him. 'Why is she being nice to me? What does she want?' Harry begins thinking of the different possibilities about what she is doing. He disregarded it as being the Imperius Curse, as her eyes are not glazed over.

Harry slowly sits down at the table across from his aunt. "What is going on, Aunt Petunia?"

Petunia sighs loudly. "I know I've never been the…best aunt in the world. I now know how wrong I was to treat you like that, and what pain I've put you through, and I can't say how sorry I am."

Harry is in shock. 'She's never apologised to me before, this is very strange,' he thinks. "Then why keep me at all? If you hated me, why not just send me to an orphanage? Just why?" He raises his voice to a yell by the end of his small rant and is breathing heavier, all his pent-up emotions since Sirius' death are clawing inside him to be let out. Harry takes a few deep breaths and gets his emotions back in check. He looks up to see his Aunt Petunia looking at him with a look of shock and sadness.

"I was of two minds. You see, when your mother first showed signs of magic, I was amazed at first, it was beautiful and mesmerizing," she began to explain, "but then I began to feel jealous, she received that letter to that school and I didn't. I was mad that she got the gift of magic and I didn't. When she left on September 1st, I sent a letter to the headmaster, asking if I could be with my sister, but I was told no. I started to hate them, they were taking my sister away and I hated them. When she graduated we barely spoke." For the first time, Harry sees his aunt show emotion towards his mother.

"What happened next?" he asks her quietly.

Harry almost immediately notices a change in her posture and facial features. "You showed up on our door step, all bundled up with nothing but a note briefly describing the events that took place that night. Your Professor Dumbledore," she practically spat the name, "practically ordered us to take you in or else he would make us pay dearly," she says. Harry now looks confused.

"What do you mean? Professor Dumbledore would never do that!" Harry exclaims loudly.

Petunia looks at Harry with a shocked expression. "D…didn't Sirius explain this to you?"

Harry immediately stiffens and feels his heart clench in sadness. "H…he's dead," Harry says with tears in his eyes.

"Oh Harry, I'm so sorry, I didn't know." Petunia's eyes are wide as saucers.

Harry's eyes narrow. "Why do you care?" he snarls.

Harry notices that his aunt is not looking at him anymore, but rather at the envelope on the table in front of her. When he takes a closer look at it, he notices the writing telling who the letter was addressed to.

To Harry. J. Potter

My godson.

Harry's heart leaps into his throat as the tears he has been trying to hold back begin to stream down his face. "What is this? Why do you have a letter for me?"

Petunia sighs sadly. "A dog showed up one day while you were at your school, and we brought him in," she began. "Imagine my surprise when, that night while your uncle was asleep, the dog transformed and introduced himself as Sirius Black. He explained to me that things were not as they seemed, and told me some things that he said are in the letter. He gave me the letter and asked me to give it to you if anything happened to him. I'm so sorry Harry, he seemed like a nice man."

Harry's tears have not subsided, in fact they have started to fall faster down his cheeks. His aunt slowly gets up and grabs a box of tissues, then sits back down at the table and slides both the letter and tissues across to Harry.

"Here you go dear, I…I'll leave you to read that in peace," she says, as she gets back up and slowly leaves the kitchen, not looking back.

Harry shakily reaches for the letter. As he picks the letter up and feels the parchment, he ghosts his hand over the few words on the envelope and feels a sense of dread and sadness wash over him. 'Why would Sirius give my magic hating relatives a letter when he could have owled it to me?' thought Harry, forgetting for a brief moment that owls were restricted by Umbridge. Harry flips the letter over, quickly breaks the wax seal, pulls the letter out, and begins to read.

Dear Harry

If you are reading this letter, that means I have died before I could tell you the lies I've discovered. I am so sorry for you having to read this letter, but it seems like my days are getting fewer and fewer. I'm sad that we will not get the chance to do the things that a godfather is supposed to do with their godchild, but just know that I will be with your parents and that I'm proud of you, and so are they.

Now, enough of this talk of death, I have a reason for writing this letter and I beg you to keep an open mind, and to at least and to check the claims yourself, please, for me. Now, I need to tell you that the Order is not as good as they seem, at least not anymore. Dumbledore has begun to order them to make sure you learn nothing, and has told your friends not to talk with you during the summer. I am sorry to say, but both Ron and Hermione are paid by Dumbledore to be your friends, and to keep you from exceling in your classes. Not only that, but Ginny has been tasked with dosing you with love and loyalty potions, with the help of Snape and Mrs. Weasley by Dumbledore's order. Now, this will be more difficult to tell you: Dumbledore has been lying. He has been manipulating you and keeping you away from your past. Go to Gringotts and speak with Griphook. Ask for him to take you to Ragnok, he will ask you to identify yourself. Tell him your name and then say, "The Marauders' heir has returned." They'll know what to do after that. Just trust them, and everything will work out.

Now I must go, or else someone from the Order will find out. Remember, Harry, that I love you and always will. Now go and be free and enjoy your life.

Sincerely

Sirius. O. Black

A.K.A. Padfoot

Harry is sobbing uncontrollably when he finishes reading the letter. He can't believe it, he just can't. 'Why would they do that? Just why?' he thinks. After a few moments, his sobs die down, and he wipes his eyes. He stands up, grabs the note, and slowly leaves the kitchen, noticing that he has been in there for more than two hours. Upon exiting the kitchen, he notices that his aunt has left. 'Probably to get something for dinner,' he thinks. When he reaches his room and enters, Hedwig has left to go hunting, and there is a small note from Dumbledore on his bed. When he picks it up and opens the note, it says only a few words that spark his anger.

Stay inside, do not leave.

For the Greater Good

A. Dumbledore

Harry angrily crumples the note in his hand and flings himself onto his bed. 'So, I'm being kept a prisoner. Well, maybe its time to change a few things,' Harry furiously thinks to himself. He begins to think up a plan to get to Gringotts, and to discover the truth.