A/N: really wanted to write this. Hopefully this crossover gets finished. And I think it might, now that I'm focusing on it.

Disclaimer on profile for those who actually care about such things.

Young Justice: Order of the Phoenix

What's Past is Prologue

Hogwarts School of Witchcraft and Wizardry
September 1, 2006; 19:16 UTC

"Crock, Artemis!" Professor McGonagall called out. A young girl with blonde hair and Asian features came forward and sat on a rickety, old stool. A shabby pointed hat was placed on her head.

"Ah, much determination and cunning in this one, especially at such a young age. Oh, and your abilities – so impressive. Only one house is suitable for you." The Sorting Hat stiffened on her head. "Slytherin!" The hat was removed from her head as she got up off the stool. She glanced back to spot her cousin, Draco, smiling. Harry Potter and the two redheaded friends of his didn't look pleased.

Why should I care?

Hogwarts School of Witchcraft and Wizardry
September 1, 2006; 19:23 UTC

"West, Wallace!" Wally grumbled about his proper first name as he approached the stool. He had just witnessed his cousin Ron be sorted into Gryffindor, the eternal home of the Weasley family. The hat plopped down onto his head.

"Much knowledge you have, and quite the impressive range too. I know of a house that'll suit you just fine. A pity the Granger girl didn't let me do this."

"Ravenclaw!" The Weasley clan clapped for him with less enthusiasm than they did for Ron. Wally didn't mind; being an American at Hogwarts and not Ilvermorny was considered beyond bizarre. But to have two in one year? Not even the Magical World was used to such curiosities.

Worst part for Wally was that the other just happened to be at the Slytherin table.

Hogwarts School of Witchcraft and Wizardry
November 23, 2006; 14:12 UTC

"Nicholas Flamel? He's an alchemist. Worked with Dumbledore to make the Sorcerer's Stone." Wally was confused by the questions launched at him by Harry, Ron, and their newest Gryffindor friend, Hermione Granger—whom the Hat wanted in Ravenclaw, he still remembered. "Why do you ask?"

"It's nothing, cousin," Ron said. Wally narrowed his eyes, but said nothing.

"Come on Ron, Hermione. We need to get going. Hagrid is expecting us."

"You know about his pet?" The three froze at Wally's question. He smiled, watching them take a step closer.

"You know about that three headed thing?" Ron asked.

"No, you idiot. Hagrid has a dragon's egg. Why else would the big guy be looking around at books about raising dragons? It's not like he's teaching the Care of Magical Creatures."

"Not yet," Hermione said. "He knows more and cares more for the subject that the current Professor."

"Whatever you say. Now scram. I need to study."

Hogwarts School of Witchcraft and Wizardry
March 9, 2008; 6:57 UTC

Artemis knew something was up. Other than the petrified cat, a couple petrified students, and a fried ghost, something was wrong at Hogwarts. A common theory, even within Slytherin, was that Harry Potter himself was the Heir of Salazar Slytherin. The idea of the Golden Boy of Gryffindor being Slytherin's Heir was a load of shit. Her father had taught her that much.

Yet it was overhearing Wally at breakfast when she finally heard one that made sense.

"I tell you Ron, the only logical person has to be whoever has Tom Riddle's diary. I messed around with his full name, the one that Harry was able to get out of it before your dorm got ransacked, and guess what I got as an anagram." Ron stared at his cousin while Artemis listened in. "I got 'I am Lord Voldemort.'" She watched Weasley flinch. "I'm telling you. Whoever stole that diary from Harry is responsible for everything."

"So what are you going to do? March into Moaning Mrytle's bathroom and demand a name?"

Wally smiled, stood up, and walked out of the Dining Hall.

Hogwarts School of Witchcraft and Wizardry
September 12, 2008; 13:16 UTC

Over the summer, Wally discovered that his Uncle Barry and the Flash were the same person. He hadn't gotten all of the chemicals needed to do the experiment to give him super speed, but Snape's stores back at Hogwarts had exactly what he needed. He waited a month into school before attempting it in class. He mixed up the chemicals from Barry's lab with the ingredients he had to wait for.

"West. What are you doing?" Wally turned to find Snape right behind him.

"Uh, changing my life?" He pulled out an electrode and set it on the far side of his cauldron. He set the second one of the other side. "I'd suggest standing back."

There was a quick flash of electricity before his cauldron exploded. The electrified mixture soaked Wally before being banished by Snape.

The day after Madam Pomfery released him, Wally tested the effects by running across the Black Lake. It had been a success.

Hogwarts School of Witchcraft and Wizardry
December 19, 2009; 11:41 UTC

Artemis had been dreading the Yule Ball. Nobody had dared ask her after she turned down Viktor Krum.

"Hey, Beautiful." Artemis kept walking, not having the time for the usual antics of Wally West. He was surely going to rub in her face how she couldn't get a date for the Ball. It didn't matter much, given that Lisa Turpin had rejected him very publicly the night before. He kept right behind her, not taking the hint. "I have a question for you."

"And I have an answer: no." The entire school had to be aware of the animosity between the two Americans. It was stronger than that between all of Slytherin and Harry Potter.

"But I didn't even ask. And anyways, this isn't America where you can get away with going Stag. Actually, that's more Harry's sort of thing, but that's a long story. So last year."

Artemis turned on him. "What do you want, West?"

"WillyougototheYuleBallwithme?" Between his fast talk and the obnoxious amount of food he consumed, Artemis was sure there was something extremely strange about Wally, besides being an odd wizard.

"If I go, will you leave me completely alone until next year?"

"Of course, Beautiful. And thanks." They then parted, Wally aking a random turn away while Artemis continued forward.

John F. Kennedy Airport, New York City
June 19, 2010; 17:27 EDT

"I'll see you at the end of the summer, Arty." She glared at Wally, both of them having been on the same plane without their prior knowledge. She was on her way to catch a short flight to Gotham while he continued on to Central City.

"I'll see you then, Wally." She pulled her carry on suitcase out of a moleskin pouch incorporated with an Undetectable Extension Charm. "I'll try to get you an autograph of Robin." She turned away. "And, I had fun at the Yule Ball."

"I did too Artemis."

Central City
July 5, 11:53 CDT

Mary and Rudy West weren't prepared for when their son returned home, battered, bruised, and with a torn uniform. However, the greater surprise was his guest: Superboy. Ever since Mary told Rudy and Wally about her being a witch just after Wally's letter for both Ilvermorny and Hogwarts arrived, nothing as strange had ever occurred, even after he gained his powers.

"So Robin, me and Aqualad," Wally began.

"Robin, Aqualad, and I, Wally," Mrs. West said.

"You weren't there," Superboy said. "He had it right."

"Thanks Supey. But as I was saying. Robin, me and Aqualad make our way down to Level 52 in search of Project Kr. We soon find it, but we discover that Cadmus had cloned Superman, as you can see by the presence of Superboy here."

"Tell me something good came out of this," Rudy said, a cup of coffee in hand.

Wally grinned. "Batman's thinking about making us into a team."

Mount Justice
August 8, 19:50 EDT

Artemis was nervous. She had been doing the hero gig for a little over a week and here she was at Mount Justice of all places with her new mentor Green Arrow and Batman. They had brought her there so she could be introduced to the Team, the same one she had aided in fighting Amazo, going as far as to save the life of Kid Flash. The League had confirmed the installation of a zeta beam connection between Hogsmeade and the Mountain, along with a Time Turner courtesy of the Department of Mysteries, British Ministry of Magic. They went as far as saying that a similar set-up had been devised in the past, not that she believed them.

The Team shortly arrived, all in uniform. She recognized Kid Flash, Robin and Aqualad from the news. Superboy had been the one to lead her to the fight at Gotham Academy. The final member, obviously a Martian, was unfamiliar to her.

"Team, meet your newest member, Artemis."

A/N: hopefully I can get the second chapter up in a reasonable amount of time.

Edited 17 March 2016.