HARRY POTTER: DUELIST OF DESTINY

Inspired by Last Day of the Wizard written by

OrigamiCake

Harry Potter wakes to a world not his own—one of strange skies, unfamiliar rules, and powers that hum with something ancient and watching.

He doesn't know why he's here.
He only knows he's not alone.

A Harry Potter x Yu-Gi-Oh! GX crossover.

Chapter 2: Crossing the Threshold

"God, that was harsh..." Harry muttered to himself, his hands still trembling slightly from the intensity of the battle. His mind raced, unable to shake the sensation that something deep inside him had just snapped into place. He glanced around at the crowd of students, still buzzing with excitement. It had been a victory, but it felt... different.

A strange thought tugged at the back of his mind: Why'd it feel like I just duelled in some dramatic show of magic?

Harry shook his head, trying to dispel the feeling. Magic. That was what it used to be, wasn't it? He'd fought with spells, charms, and hexes for so long that this odd world felt almost like an imitation. It was hard to grasp. Hard to let go of what he'd always known.

Focus, Harry. You've got to focus.

He turned his attention to his Duel Disk, the metallic device clicking quietly as it powered down completely. He felt a brief surge of relief as the hum of the Duel Disk ceased, the pressure of the duel finally lifting. But that nagging feeling, like something had shifted deep inside him, lingered.

With a deep breath, Harry began to recall the cards resting in his Graveyard. His fingers brushed against them, the cool, smooth surface of the cards giving him a strange sense of comfort. He took them into his hands, carefully inspecting what he had left.

One of the cards—a card he hadn't even had a chance to play—caught his attention. A deep unease settled in his stomach as his gaze lingered on it. His heart skipped a beat. He knew that card. Or, at least, he knew of it.

It reminded him too much of... No. He quickly shut down the thought, pushing it to the back of his mind like a bad memory he didn't want to confront. The memories of another life, of another world—his world. His fingers tightened around the card, but with a quiet exhale, he slipped it into the bottom of his deck, as if burying it where it couldn't cause any more problems.

But then there was the other card. The one that brought a faint smile to his face.

"Mirror of Erised" he whispered to himself, a chuckle escaping his lips before he could stop it.

Of course. It was a Trap Card. And yet, it felt oddly fitting. It was like a small piece of his old life had found its way here, into this new reality. The mirror didn't show you what was in front of you—it showed you what you truly desired, what you longed for. And after everything he had gone through, all the battles, the heartache, the impossible choices—well, Harry supposed it made sense. What did he desire now?

With a gentle sigh, he slid the card back into the deck, the motion both calming and heavy. He let the moment linger just a bit longer, feeling a strange peace settle within him. The world around him could change. But some things, the deep parts of him, would always remain.

As he did, he noticed the crowd of students still murmuring with interest. The whispers were louder now, filled with awe and curiosity, eyes darting toward him. It wasn't just the duel that had caught their attention; it was him. Harry. He was different. His deck, his monsters—they felt... alive. Brimming with emotion. With meaning.

Harry's gaze drifted over to the card of his fusion monster, Fluffy the Three-Headed Fiend, a terrifying yet loyal creature that had come to his side during the duel. The students were still talking about it, their voices filled with admiration. Harry felt a small sense of pride in what he had accomplished. He had done it—summoned something incredible. Something that had a real connection to him. Even without his magic, even without the familiar feeling of his wand in hand, he had created something powerful. And it had felt right.

"Not bad, Harry... that is your name, right?" A voice cut through his thoughts, light and cheerful, but carrying with it a note of genuine admiration. Harry looked up, blinking as he saw Jaden Yuki walking toward him, his trademark grin stretching across his face.

"That was one heck of a duel. Fluffy? That's a monster I wouldn't want to mess with." Jaden's voice had the usual carefree tone, but there was something in his eyes that showed a quiet respect. He held out his hand, a gesture of camaraderie and acknowledgement.

Harry hesitated for just a second before reaching out and shaking Jaden's hand. The handshake was firm, friendly. And then, with a bit of a struggle, Jaden lifted Harry to his feet, his grin widening.

"You did great. You've got some serious skills, man," Jaden said, his voice bright with a mix of praise and a hint of something like amusement. "You're going to fit right in here."

Suddenly, a low growl interrupted his thoughts—his stomach grumbled audibly, much louder than he anticipated. He glanced down, embarrassed, and scratched the back of his head.

"Hungry?" Jaden asked with an easy grin, motioning toward a nearby vendor hawking bars of chocolate. "I've got a ton of these things. Best thing on this island. Come on."

Harry hesitated for a second, then nodded. The thought of food... any food was more interesting to him.

A Few Hours Later…

The warm breeze tugged at Harry's blazer as he leaned against the rail of the boat, gazing out toward Duel Academy. It loomed ahead, like something from a dream. Its towers rose high above the ocean, reflecting the sunlight off gleaming surfaces, their spires piercing the cloudless sky. The school seemed like something from another world—distant, surreal, and yet oddly inviting.

"So, what do you think?" Jaden asked, appearing at Harry's side, his energy as boundless as ever. "Pretty cool, huh?"

Harry let out a breath, still not quite used to this world. Duel Academy, a place where magic—or whatever it was—wasn't conjured by wands and potions, but by the cards you held in your hands.

"It's big," Harry replied, still staring out at the horizon. "Feels like a place for… people who belong here."

Jaden chuckled, his grin widening. "Well, guess what? You're one of them now. You've got a Slifer Red Blazer. That means you've got just as much right to be here as anyone else." He paused, eyeing Harry's thoughtful expression before adding, "But don't let the red jacket fool you. This place? It's not about what you wear—it's about what you can do with your deck."

Jaden casually adjusted his own red blazer, a playful gleam in his eyes, before giving a laugh and bouncing off toward the blue-haired boy from earlier. "Catch you later, Harry!" he called over his shoulder, waving enthusiastically as he walked away.

Harry blinked, still processing everything. The carefree nature of Jaden's words hung in the air, as did the idea that this world had a new kind of magic—one that he had to learn to harness.

And then, as Jaden disappeared into the crowd, Harry remembered. The blue-haired boy. That kid's name... He really needed to figure that out.

Harry glanced at the Duel Disk on his arm, the flashing lights dimming as he adjusted it into a more comfortable position. It wasn't magic in the way he had known it. But maybe, just maybe, this was a new kind of magic. The connection to his deck felt different than anything he had experienced before. He still didn't quite understand it, but there was a strange comfort in knowing that he wasn't alone in it.

"I'm still trying to figure it all out..." Harry said, his voice low and to himself now.

Harry's fingers brushed the edge of his Duel Disk again, feeling the cool metal against his skin. Maybe this was his destiny now. No wands, no charms, but something else entirely. Something he could control.

MEANWHILE

"You sure this is a good idea, boss?" the cloaked figure asked, voice low, arms folded beside a humming monitor that bathed the room in flickering blue.

The man in the chair didn't look up.

He sat reclined in velvet, surrounded by curtains and a shifting shadow that moved without a flame. A single wine glass—untouched—rested beside a neat stack of shimmering Duel Monsters cards. His white-gloved fingers steepled beneath his chin.

"Those cards he played…" the cloaked figure began again, hesitantly.

"—are beautiful," the man finished, his tone almost reverent. "And utterly unlike anything I've seen."

He leaned forward slightly, just enough to catch a glint of light beneath silvery bangs.

"They don't belong to any set, official or otherwise. No registry, no prototype batch, no leak or blueprint. They are original. Untamed."

He smiled as the monitor displayed a still image: Harry Potter. Behind him, Fluffy the Three-Headed Fiend, its three heads snarling, alive in ink and light.

"They weren't designed," the man continued softly, fingers brushing the rim of his glass. "They were born. Each one brimming with intent, emotion... even a past."

The cloaked figure remained silent now.

Another flicker. The image shifted to Harry holding the Mirror of Erised.

"And that Trap... magnificent," the man mused. "It's Fascinating."

The man in the chair didn't stir as he glanced at the monitor, the flickering light casting shadows across his face. He took a slow sip from his glass, his fingers never leaving the rim as the image of Harry Potter, standing at the edge of the ship, flashed across the screen.

Without breaking his focus, he reached out, tapping a button on the console beside him. The screen shifted again, showing a darkened room, and the figure of a man who stood confidently, his presence commanding the air around him.

"Yes?" A new voice crackled through the connection, cool and collected, though there was an unmistakable edge of curiosity in his tone.

The man in the chair did not show himself, only his shadow seeming to stretch unnaturally across the room. His voice, however, was clear—low, calculated, and laced with a strange sense of anticipation.

"There's something… different about the boy. Something in the cards he plays," the figure said, his voice smooth like velvet, yet carrying an unsettling weight. "I need you to… observe. Investigate him, see if he truly understands what he's holding."

A brief silence hung between them before the other voice responded, his tone both intrigued and cautious. "And what am I looking for exactly?"

The figure's lips curled into a slight, unseen smile. "Everything."

The line went silent again, leaving only the hum of distant machinery in the background.

He stood slowly, the shadows peeling back just enough to reveal the faint gleam of a ring on his gloved hand. The monitor's glow dimmed behind him.

"I must know what else that boy is hiding in his deck," he said, voice rising with delight. "There's magic at play here—not the kind this world understands."

He turned, cloak sweeping behind him like a stage curtain.

"Prepare a jet!" he said, barely able to contain the grin in his voice.

The monitor behind him crackled. Then dimmed into silence.

-END-

-Cards Not Used in Duel but mentioned-

Mirror of Erised

-Continuous Trap-

"When an opponent's monster declares an attack, activate this card."

"The attacking monster is placed in a trance-like state, unable to attack, change its battle position to Defense (to reflect this), or activate its effects for as long as this card remains on the field."

"The monster remains in this trance until Mirror of Erised leaves the field."

"During each of your Standby Phases, you may pay 500 Life Points to keep this effect active."

"If 'Mirror of Erised' is destroyed, return all monsters that were in a trance-like state to their original battle positions."