This'll be after the events of the Cursed Child but it'll have some elements from the movies as well.
I own only my original characters, nothing else.
Azkaban. Just uttering the name can send shivers down your spine. That place held the most vile and evil witches and wizards in the world. And now... for the past three years... the daughter of the late Dark Wizard Lord Voldemort, Delphini Riddle, had been imprisoned there for usage of the Unforgivable Curses and attempting to alter time.
For three years she has suffered there. Suffered the agony of starvation and madness. While the prison wasn't as bad as it had been before when the vile creatures, the Dementors, guarded the prison, the aftermath of their presence lingered still, twenty-five years.
She was not the only one in Azkaban, as to be expected. Her fellow inmates included the remaining Death Eaters, the followers of Voldemort, those who had survived the Second Wizarding War. One former prisoner in particular she seemed to have been vaguely intrigued of was her stepfather, Rodolphus Lestrange, her mother, Bellatrix Lestrange's husband. It was he that had told her of her heritage and it led her to trying to alter the timeline and save her father.
Throughout this time, Delphini thought of nothing but her vengeance against the man who killed her father... Harry Potter. And next would be his son, Albus Severus Potter and his friend and her cousin, Scorpius Malfoy.
For three years now, she has stayed, scratching writing into the walls, counting how long she had been there, or leaving threats against the Potter family, saying that she would return.
Only thing that is in her way... was finding a way out of the inescapable prison. While she knew that Sirius Black had been able to escape, she wasn't an Animagus like he was.
"...Harry... Potter...," she muttered only to herself.
"Oi, Riddle!!," a prison guard yelled and he slid a tray with very little food on it under the door. "Supper!!"
After the Second Wizarding War, the Ministry purges Azkaban of Dementors and hires Aurors to guard Azkaban instead of them. The guards regularly rotated from the mainland and since the new system was introduced, there has never been any breakout.
Delphini immediately began to engorge herself, glaring at the door.
'I will not die here,' she thought to herself.
Unknown to anyone, that as the rain poured down hard, a young man approached the edge of the mainland. He wore a black hooded overcoat with the hood up, a normal white t-shirt with writing on it, (https/www.ebay.co.uk/itm/Mens-Stylish-Slim-Fit-Hooded-Canvas-Peacoat-), black jeans and black military boots.
He then simply waved his wand... and revealed the dreaded prison to himself. Once the triangle shaped building was visible, he Disapparated and ended up on the roof of it.
He simply stood there for a few moments as he pulled his wand out once more. At first glance it was nothing special about it, only the bottom looked like the head of a phoenix and the entire wand was pale colored like a bone.
The boy simply began to casually walked downstairs, using magic to dry himself off. Soon enough the guards began charging at him when they detected magic being casted and they realized the prison had become exposed.
"Hey!! Drop your wand now and get on your knees. We've got you outnumbered," one guard yelled as the prisoners began to come up to the cell doors to see what the commotion was.
"Yes... yes, it would seem that way," the man said, not dropping his wand and began turning around to see there were at least seven guards pointing their wands at him. "However... you're quite outmatched."
"This is your last warning, kid..."
"No, my fellow wizard... it's your last warning."
Delphini now got up to see the guards were in front of her cell.
"Take him dow- Ahh!!," he yelled before the man released a huge blast of fire magic and vaporized them, destroying the cell behind them, but not Delphini's.
"Tsk tsk tsk... so ignorant. So stupid," he said and looked around. "Fear not my brothers and sisters!! None of you shall be harmed, no... all of you... shall be freed from this place."
He began to walk over to where the guards were, and saw that one had dropped his keys. He grabbed them and threw them into cell with a prisoner in it.
The prisoner got himself out and began to unlock the other cells as the man came to Delphini's.
The door was then opened and he lit the tip of the wand with a Lumos charm and now was face to face with the heir of Slytherin herself.
Delphini could see now see the man's face in the light. He was only a few years older than herself, slightly long black hair and a short beard, both of which were turning white in some areas, but the most unique features of his face... were his eyes. The left one was of a piercing blue color and the other was a very pale blue color.
"Delphini Riddle... what pleasure to make your acquaintance," he said, unlocking her chains and helping her stand on her feet. "Now hold on tight. We shall be getting out of here."
"Who are you?," she asked.
"I'll introduce myself when we are safe. We must go, the other guards are coming."
They both then Disapparated back to where he started... and watched as a great shadow rushed over to Azkaban... and destroyed the rock island it had been built upon. The two watched as the symbol of terror came crumbling down and turned into dust.
"What was that?," Delphini asked, not at all affected by all the wizard that had just been killed.
"To reach one's potential, one must let the past die, even if that means it must die by your own hands," he explained.
He looked to see that she was soaking wet from the rain and he took her hand once more and Disapparated to a far off place in the mountains of Austria.
"Where are we now?"
"Nurmengard Castle. Perhaps you've heard of it?"
"Yes. Gellert Grindelwald lived here once," she said as he used magic to dry her tattered clothes.
"Come, let's get you into better clothes and get some proper food."
"I don't think so."
She then kicked him in the gut and grabbed his wand, threatening to kill him.
"Now then... who are you?," she demanded.
"Hahaha...," he chuckled as he got up. "My name is Jason. Jason Grindelwald."
This made her go wide eyed when he said this.
"Grindelwald?"
"Indeed. That wand by the way... is a gift for you. Have a look at it."
She then got a good long look and realized what it was. It was her father's wand.
"Where did you get this?," she asked coldly.
"I found it when I was searching the Hogwarts school grounds. Seems your father threw it away when he took the Elder Wand from Dumbledore's grave."
"...Why are you doing this? What's your gain from helping me?"
"...We're the same you and I," he answered and he began to walk closer to her. "We both how it feels. The feeling of having no one, the feeling of wanting to be loved, that longing to be with your parents."
She said nothing this and kept her wand at the ready.
"No doubt you wish to kill me now. So many ways you could do it."
She kept her wand pointed at him, the curse she wanted at the tip of her tongue. Then he gently pushed the wand out of his face, and she lowered it.
"...But what good would it do? All it would do is rob you of possibly the only person who could ever truly understand you for what really you are."
"And what am I, exactly?," she asked, playing along with this game of his.
"You are a daughter who wishes that she could've known her parents, just as I am a son who wishes the same. A witch and wizard who merely wish to live the way we want with no one stop us from doing so."
She was silent for a few moments as she thought on what he had said and soon enough... she calmed down.
"Very well then, I will hear you. But you never answered my last question. What's your gain from breaking me out of prison?"
He smirked slightly and motioned his hand to move a lock of Delphini's silver hair out of her face, but she grabbed it out of instinct but let go when she realized what he was doing.
"It's probably best that we wait for my follower to return before we go into detail. They won't be long. Until then, let's get you cleaned up and properly dressed."
He offered his arm like a gentleman and she smirked at the gesture before taking it. He led her to nearby room, and showed her the bathroom.
"I had it arranged for clothes of various sizes for you to be placed here, as I did not know your size," he said. "I shall leave you to clean yourself up. Is there anything else you need?"
"...Perhaps that proper food you mentioned before," she said as her stomach growled ever so slightly.
"We must take it slowly as they seem to have slowly starved you intentionally."
She nodded and he left the room so as to have some food ready. Just as he left, he caught a glimpse of her, and saw her augurey tattoo on her back and neck. As she washed herself, she began to think on her host.
"A Grindelwald...," she muttered to herself.
Potter Residence
Albus Severus Potter, along with his best friend, Scorpius Malfoy, has just graduated from Hogwarts School of Witchcraft and Wizardry.
Now, they sought to become Aurors, they had already spoken to Albus' father, the famous Harry Potter, the department's head, who said he'd get them a position, especially since that so many Aurors had been either killed or gone missing whilst hunting this new dark wizard, which rumors are saying is the Death Eater, Rudolfus Lestrange.
For now however, Albus was staying with his parents and sister until he was officially an adult as he was still only seventeen.
He laid in bed, thinking what had happened in his fourth year, when he and Scorpius traveled through time to the death of Cedric Diggory, a friend of Harry's, at the hands of Lord Voldemort. Then to his grandparents' deaths. Ultimately, Delphini's plans failed and she was now in Azkaban.
Suddenly, there was a loud noise downstairs, as if someone had just Apparated into the house.
He quickly got up, along with his little sister, Lily Luna Potter, and his mother, Ginny Potter.
"Albus?!," a voice was heard.
They quickly went downstairs to see it was just Harry and Albus and Lily's older brother, James.
"Dad, what is it?," Albus asked.
"Ginny, can you bring Lily back upstairs?"
She nodded and led their youngest child upstairs, much to her dismay.
"...Azkaban Prison is gone."
"Gone?"
"Destroyed," James clarified. "By who is unknown."
"Did anyone survive?," he asked.
"We don't know," Harry answered. "There were some who were not amongst the dead, thought. Unfortunately... Delphini Riddle was one of these missing people, along with several guards."
Albus' eyes widened greatly at this news.
"That's not good. Any idea where she might be?"
"No. As we have just received the news. If she's alive, there's no telling where she could be."
Nurmengard
Delphini began to explore the castle, now cleaned up. She now wore a black long sleeve shirt and black pants, black heeled boot and over it all she wore a light, dark charcoal grey colored, gothic style long coat. Her hair was now clean and back to its silver color and blue tips were restored and in a ponytail.
She still had her wand in her hand as she walked around. Then she encountered a girl, about the age of seventeen, long black hair and brown eyes. She wore mainly dark red and black clothing and her wand was also black and square shaped almost at the handle. But what Delphini found strange was how timid she seemed, and yet sensed a dark power within her.
The girl saw her and shyly waved.
"Just who might you be?," Delphi asked, drawing closer.
"She... is an associate of mine," Jason said, walking up to her. "Amelia, this is our guest, Delphini Riddle. Delphini, this is Amelia Barebone. She... is the one who destroyed Azkaban."
Delphi looked at the child as she looked down a little.
"...Well then, I thank you for that. It was awful being imprisoned there."
"...You're welcome," she said softly.
"Amelia... is it done?"
"Yes, it is."
"Well done, then," he said. "Why don't you go to bed? We'll talk more in the morning."
She nodded and suddenly but slowly turned into what appeared to be some sort of sentient smoke or shadows and she went up through the ceiling and passed through it easily.
"...She's an Obscurus," Delphini concluded and Grindelwald nodded. "How is she still alive?"
"That is a very good question... for another time. Let's get you something to eat."
"You said you'd tell me why you helped me."
He said nothing until they came to the kitchen and prepared her something.
"...My grandfather was defeated by Albus Dumbledore in 1945. He was sentenced to life in prison. A prison he himself built to house his enemies in. The very structure we stand in now. It wasn't until your father visited him that he finally died... by his hand, no less. Everyone else died soon afterwards without their precious leader."
She continued to listen as she ate her first proper meal in a few years.
"The place was abandoned for twenty-two years before I came a few years ago. I brought it back to its former glory while Amelia attended Ilvermorny School of Witchcraft and Wizardry. I still haven't answered your question, though. We have both suffered for sins and crimes that we did not commit. Now that... is quite unfair, don't you agree?"
"...Yes, I agree. But I take pride in what my mother and father did."
"As I take pride in my grandfather's deeds, minus the death. Death... is never something to celebrate, no matter who's death it is."
She stopped for moment before she shrugged slightly in agreement.
"Our families both fought and died for causes that they believed in. They had a grand vision for the future... just as I do."
"And what might that be?," she questioned.
"...You saw that look that Amelia had, yes?," Jason asked, and she nodded. "She was forced to hid her powers from the world cause she was being raised by No-Majs, abusive ones no less. She was kept alive by the Obscurus within her. I met her six years ago when she was eleven. I was so... horrified by the conditions she lived in... I killed the No-Majs and took her in as my daughter. Or sister, it never truly mattered, she was grateful all the same. I sent her to Ilvermorny, and I would teach her how to better control the Obscurus. But... she had to hid who she was, because she was afraid of all those around her.
...No more. It's time for the world to know we exist."
"I agree. But there's a problem."
"...Harry Potter...," they both said at the same time.
"But not just him, but also his son, Albus. They must be eliminated, or turned to our cause."
Delphini immediately leans across the small table and puts her face close to Jason's face.
"Leave any Potter we encounter to me... you leave their deaths to me... and I shall follow you until the end," she promised and he smiled slightly at this.
Hope this was good. Sorry if I'm inaccurate with the personalities of any of the characters in this story as I haven't read or seen the play of Cursed Child. I'll be borrowing some scenes from the two Fantastic Beasts movies, but I hope you like what I do. The story will focus mainly on the bad guys but I'll talk about the Harry and the others a lot as well. Until the next chapter is up, see ya later.