CardDimension Neptunia! Let's Duel!

by SSJC J

Dreaming to be the next duel king, Julio Shinku meets a duel spirit but turns out she's actually a goddess. When dark forces attack he must take up the call to action. With unique cards, a dragon duel spirit and a couple of friends he and his new friends will take them all down! Maybe! We'll see I guess. Rated T just to be safe. Pairing: Decided.

1. Chapter 1

Prologue: First duel

What is going on guys? I welcome you to the first Yu-Gi-Oh x Neptunia fic on this site. I'll reveal my motivations to this story and what I plan to do at the end. I hope you enjoy.

Bold=Author

Italics=Thinking/description

Regular=Speaking

Disclaimer: I don't own Yu-Gi-Oh or Hyperdimension Neptunia only my OCs and the overall story behind this fic.

3rd person

Duel monsters. What started as a simple card game became something much more. To some it's just a game to others a way of life. Very few know the monsters that they use in a duel are real or used to be and those who do know have very strong bonds with the cards though few can see their spirits. For Julio Shinku his bond with his cards have made him unique and while not the strongest duelist he more than proves his strength.

In a room we find him sitting with several stacks of cards on his desk ranging from small to huge. He looked at each card and either but them in another stack or a smaller one which was his deck.

Our protagonist was a rather short teen standing about 5'2 at the age of seventeen and rather skinny with spiky black hair akin to that of a certain shonen hero but was shorter and not as wild along brown eyes that were almost red. He had a decent looking face with a small scar over his right eyebrow but was covered by a descending spike. He wore a short sleeved red shirt and blue jeans and black socks.

The room itself was medium sized with red walls and brown carpeting and a television with a game system. In the far right of his room was his computer setup. He had a few dressers that were black but looked old. His bed towards the left of his room had red sheets and matching pillows on it a small black rabbit slept. He had no closet so he kept all his clothes in his drawers and his shoes by the door.

"All right that's enough deck building for now." He said getting up and stretching as he put his deck in a deck box. He turned to the rabbit who had woken up and let out a squeak. He chuckled before patting his lap. "Come on Thump."

The rabbit jumped off the bed and made his way to Julio's lap where he curled up and looked up at him. Julio chuckled before rubbing the rabbits head to his happiness. Julio began to sort the cards into smaller piles before placing them in a case carefully. At that moment his Duel Tablet or D-Tablet rang. He answered and saw his best friend.

"Julio you do remember what we're doing today right?" She said coldly and he blinked before realizing what it was.

"*Bleep*!" Was heard as he swore loudly. "I forgot! I'll meet you there!"

"You better or Dan will be pissed." She said before hanging up. Julio shot up but not before gently lifting Thumper up and placing him on his bed. Thumper knew how to leave the room and go outside to the back of his house should he have to use the bathroom so Julio wasn't worried. Julio put on white sneakers and grabbed his black hoodie before grabbing his D-Tablet and deck just in case along with his deck. He raced out of his room and grabbed a helmet before entering a garage where a D-Wheel sat ready to ride. He started it up and placed his helmet on his head.

"Mom. Heading out!" He yelled to his mother who was in the kitchen.
"Okay be back by ten or call if your gonna be late." She called to him as he drove off.

Julio's D-Wheel looked akin to that of Yugo's from Arc-V but where it was white it was red and all the other colors were a jet black. He was grateful for the gift from his dad who used to be a turbo duelist or a Riding duelist as they're called now. It was his sixteenth birthday gift but he wasn't able to ride it till he got his license a few months later. He quickly entered a special zone for D-Wheels and began to head to the main part of the city where the mall was. Julio lived in a city called Union City since there was an enormous diversity in ethnic groups and many opportunities in it. The city was known for strong duelists growing up in it that grew up to become pro duelists with one becoming the reigning duel king but we'll meet him later. Julio took an exit that led close to the mall. He managed to get here quickly and enter a parking lot for D-Wheels and parked it and taking his helmet off revealing his massive helmet hair but he fixed it via shaking his head. He placed his helmet in a special compartment before turning off his runner and sprinting towards the entrance. He went to the food court where he heard his name called he turned his head to find two people boy and a girl waving him over.
"Sorry!" He said as he ran to them and bowed in shame.

"It's alright we know what to expect from you." The boy said. This is Dan Mirai and is currently seventeen. He stood about 5'9 much taller than Julio something that infuriated the teen at times. He was well built and had brown hair slicked to the right side of his face and blue eyes and tan skin. He wore a blue button up shirt that was unbuttoned and black shirt with jeans and brown boots. He had a deck holder clipped to his belt and his D-Tablet on his right was Julio's male best friend and rival. They had met when they were junior high and the two dueled resulting in a very narrow defeat for Dan. Since then they always had a very even record in terms of wins and losses. "So we called you ten minutes early."

"Oh. Thanks." Julio said sitting down. He turned to the pale girl who's name is Kila Vulpin and she is sixteen. She was his height but better built. She had long red hair framing her pretty face and went to her large chest that caught the eye of several guys out of attraction and girls out of jealousy along with. Her eyes were a amber color that was almost gold and were brought out by her gold eyeliner. She wore white jacket over a black shirt that had a picture of Dark Magician Girl her favorite monster and a white skirt that went to her knees and black boots that fell just under the skirt. She and Julio had known each other since they were two and as a result were close to the point many called them a couple but they always reject the idea. "Your idea?"
"Naturally." She said causing Dan to scowl. "So we ready?"

The two guys nodded and got up ready to do some shopping. For what? Cards obviously since they were entered in the Duel cup that started up during the middle of summer. Julio especially need the new cards since his deck was far from incredible and he didn't have any sort of archetype he focused on. They walked into the card store where they were greeted by a worker.

"Julio! Kila! And Dan." A man behind the counter said. He was tall maybe 6'3 and had caramel skin and coffee brown hair which matched his eyes. He wore a collared white shirt with a name tag that said manager and black pants and brown loafers. This is Terrence Brute and the manager of the card shop. He was always kind to the three and was always ready to hold certain cards for them and give them news. "My favorite customers."

"Sup Terrence." Julio said waving his hand.

"Hi." Kila said simply.

"Been a while huh?" Dan said since they hadn't come by in a week.
"Yeah but I know yo just finished those exams at the academy." Terrence said. It was true they went to the Duel Academy in town and were the top three in their grade which was part of the reason they were in the tournament. "Here to boost your decks for the tourney?"

"Yep." Kila said simply. "I need some new cards to help bring spellcasters to my hand."

"I need a new tuner." Dan said.
"I need some support in general." Julio said with his hands behind his head.
"Well Kila here check these out." Terrence said pushing some cards to her. "Dan." He said placing several tuners out that Dan began to look over. "Julio my dude let me see your deck."
He handed it over and Terrence checked it over before handing it back.
"There's not much I can do without completely changing it." He said apologetically.

"I figured." Julio sighed.

"It's already really good anyway." Terrence pointed out.

"Yeah but you heard about that loss to Jason didn't you." Julio said sitting on a seat. "He wrecked me."

"Oh yeah." Terrence said sighing. "Poor Dark."

"Don't remind me." Julio said pulling out his ace card and staring at it. "Poor guy was humiliated back there."

"Yeah by a Kuriboh no less." Dan said getting an elbow to the gut from Kila who gave a evil glare. Julio sighed as he put his deck into his deck box.

"Oh is little Shinku sad." A taunting voice said causing Julio to turn to a unwelcome face.

"Kent." Julio said coolly. The guy stood at Dan's height but was skinnier and had a nasty smirk on his face. He was Julio's age and had red hair that went to his cheeks and blue eyes. He wore blue pants and a black shirt with a white fancy coat with expensive shoes. This is Kent Dunn he was the rich guy who many believed had gotten in based on money but he soon proved otherwise beating left and right before Julio beat him and badly at that. Ever since then the two had a hateful relationship though Julio tried to fix that multiple times but Kent made it difficult at times. "What do you want?"
"I saw you moping and remembered your loss to Jason and by a Kuriboh." He laughed causing Julio to growl and Kila to place a hand on his shoulder causing Kent to smirk. "Well hell lovely Kila."

"*Bleep* off." She said in response glaring at him causing Kent to scowl.
"What did you say you little bitch?" This caused Julio shoot to his feet and Dan to glare at him.

"Okay. Duel arena NOW!" Julio said enraged. He didn't like hearing girls called that even if he didn't know them. He sure as hell wasn't gonna like it if his closest friend was called one.

"Good I was gonna challenge you anyway." Kent said walking out with Julio following. The two went into a small arena for duelists and went on either side of a field. Kila and Dan along with Terrence went into the stands to watch along with other onlookers that knew them and heard the fight.

Julio activated his D-Tablet and placed his deck into it along with his extra deck in the extra deck with Kent doing the same. The sent out angular blades from their tablets Julio's a red angular blade while Kent's was blue. They drew five cards and glared at each other.

"LET'S DUEL!" The two yelled as a large screen showed their pictures and life points

DUEL START
JULIO LP: 4000 HAND: 5

KENT LP: 4000 HAND 5

TURN 1

~Yugioh GX Fervent Duel~

"I'll go first." Kent said before summoning a monster. "I summon Armed Dragon LV3!"

A small orange and silver dragon with a two large arms and spikes appeared thanks to the solid vision.

Armed Dragon LV3

ATK:1200 DEF:900

Level: 3 Wind

Dragon/Effect

"I set a card face down and end my turn." Kent said setting a card causing it to appear face down on the field.

JULIO LP: 4000 HAND: 5 + 1

KENT LP: 4000 HAND 3

TURN 2

"My turn I draw!" Julio said drawing a card. He looked at his hand before summoning a monster to the field. "I summon Dark Blade!"

A knight with two large swords and black and silver armor appeared his cape swishing behind him. He saluted before entering a combat stance.

Dark Blade

ATK:1800 DEF:1500

Level: 4 Dark

Warrior/Normal

"Dark Blade attack his Armed Dragon!" Julio declared and the knight shot forward and slashed the dragon.
"I activate my trap: Waboku." Kent said revealing the face down to be a card with purple borders and a picture of three women in blue robes who blocked the attack. "With it I take no damage and my monsters can't be destroyed by battle."

Wabuko

Trap card/Normal

"Fine." Julio said before setting two cards face down. "I set two and end my turn."

JULIO LP: 4000 HAND: 3

KENT LP: 4000 HAND: 3 + 1

TURN 3

"I draw and at this moment moment Armed Dragon LV 3's effect activates and I send him to the Graveyard in order to special summon Armed Dragon LV 5 from my deck." Kent declared sending the small dragon to the grave to reveal a larger one with red instead of orange and drills on its knees and several spikes on its stomach and chest.

Armed Dragon LV 5

ATK: 2400 DEF: 1700

Level: 5 Wind

Dragon/Effect

"Now I activate the card I just drew Level Up! with it I'll-" He began but was cut off.

Level Up!

Spell/Normal

"I activate my trap Joint Future!" Julio declared revealing the trap card. It showed several reels of film colliding.

Joint Future

Trap/Normal

"With it I can send a card from my hand to the grave and negate the activation of a spell or trap you activated and return it to the deck." Julio declared discarding the card forcing Kent to place the card into his deck causing it to shuffle. "The card I discarded was Card of Compensation. When it's sent from my hand to the Grave I draw two." He then proceeded to draw two from his deck.

Card of Compensation

Spell/Normal

"Fine. But that won't save your Dark Blade. Armed Dragon attack!" He declared causing the dragon to send spikes towards Dark Blade only for Julio to smirk.
"I activate my face down Rising Energy!" Julio declared activation the trap revealing it to have a man surrounded by a red aura.

Rising Energy

Trap/Normal

"With it I send a card from my hand and target a monster and it gains 1500 ATK points." Julio said sending a card from his hand. "Of course I'm targeting Dark Blade."

Dark Blade ATK: 1800 + 1500= 3300

"Counter attack." Julio declared as Dark Blade avoided the attacks and slashed the dragon's chest causing it to explode.

KENT LP: 4000-900=3100

"Grrr. Fine I activate Level Modulation." He said activating a spell card with the art having a hand and two dice. "With it I special summon LV monster to the field regardless of summoning conditions and you draw two cards. And I'll bring back Armed Dragon LV 5." The dragon reappeared and Julio drew two. "I set a card and end my turn."

JULIO LP: 4000 HAND: 5 + 1

KENT LP: 3100 HAND: 1

TURN 4

"Mu turn draw!" Julio said drawing a card. "I activate Pot of Greed. I draw two." Julio said revealing the classic spell as he drew two.

Pot of Greed

Spell/Normal

"Now I activate Double summon!" He said revealing the spell card with the image of a lion like monster and a man casting some kind of spell. "With it I can normal summon twice this turn."

Double Summon

Spell/Normal

"I summon Queen's Knight!" He said summoning a female knight with long hair and red and silver armor.

Queen's Knight

ATK: 1500 DEF: 1600

Level: 4 LIGHT
Warrior/Normal

"I now build the Overlay Network!" Julio declared as a large portal formed in front of him. "I overlay my level 4 Dark Blade and level 4 Queen's Knight."

The two monsters turned into a purple and yellow spirit and flew into the portal. A monster then appeared.

"I XYZ summon Rank 4: Comics Hero King Arthur!" A large knight with gold and white armor appeared with an enormous sword matching his color scheme he also had two glowing orbs of light circling him. He saluted Julio before entering a stance.
Comics Hero King Arthur

ATK: 2400 DEF: 1200

Rank: 4 Earth

Warrior/XYZ/Effect

"Battle. I attack your dragon with Arthur." He declared as the knight shot forward and slashed the dragon who retaliated and collided it's claws with the knight causing an explosion.

"What does this accomplish?" Kent asked with a smirk.

"Easy Arthur's effect activates by removing an overlay unit I can negate his destruction by battle and he gains 500 ATK and you take 500 points of damage." Julio explained o Kent's shock as the smoke cleared revealing Arthur perfectly fine and one less orb circling him as a glow surrounded Kent causing him to grunt as he took damage.

Comics Hero King Arthur ATK: 2400 + 500= 2900

KENT LP: 3100 - 500= 2600

"Next I set a monster thanks to Double Summon and set two cards face down and that's it for me." Julio declared setting the cards.

JULIO LP: 4000 HAND: 2

KENT LP: 2600 HAND: 1 + 1

TURN 5

"Wow Julio's kicking his ass." Terrence said smirking. "His deck's great what is he worried about?"

"Yeah for now but he's right his deck needs to evolve." Dan commented. "Plus Kent's not even going all out yet after all he's gotten stronger since their last duel."

"My turn draw!" Kent said as a wind spread across the field and Julio narrowed his eyes. Kent looked at the card and played it. "I activate Pot of Greed. I draw two."

~Yugioh GX OST The Rival Counterattack~

He looked at the two cards and smirked as he activated his face down. "Go Call of the Haunted revive Armed Dragon LV 5!"

The card showed a graveyard and spirits rising from the graves. And out rose Armed Dragon LV 5.

Call of the Haunted

Trap/Continuous

"Now I activate Level Up!" He said revealing the spell causing Julio to grit his teeth. "Come forth Armed Dragon LV 7 from my deck!"

This dragon was much bigger and had more spikes on his body and enormous claws on his hands.

Armed Dragon LV 7

ATK: 2800 DEF:1000

Level: 7 Wind

Dragon/Effect

"Don't worry because I'm tributing him for Armed Dragon LV 10!" The dragon exploded as much larger and standing on its hind legs at full height before letting out a roar. It had even more spikes on its body and two large scythe like wings.

Armed Dragon LV 10

ATK: 3000 DEF: 2000

Level: 10 Wind

Dragon/Effect

"I activate his effect by sending a card from from my hand and destroy all face up monsters on your field." He declared sending a card from his hand causing his dragon to send a storm of spikes at Arthur who exploded.

"I activate my trap." Julio declared. "Threatening Roar and prevent you from attacking." The card showed a monster roaring causing another one to flinch and retreat.

Threatening Roar

Trap/Normal

"Fine. I end my turn." Kent said with a confident smirk.

JULIO LP: 4000 HAND: 2 + 1

KENT LP: 2600 Hand: 0

Turn 6

~Swing! Pendulum of Souls~

"I draw!" Julio declared glancing at the card before smirking. "It's over."

"What?" Kent said in shock.

"I summon Second Booster!" He declared causing a large jet to appear and fly down to Julio where it hovered.
Second Booster

ATK: 1000 DEF: 500

Level: 3 Fire

Machine/Effect

"Next I flip my Luster Dragon to attack mode." He said revealing a dragon with skin like gems.

Luster Dragon

ATK: 1900 DEF: 1600

Level: 4 Wind

Dragon/Normal

"Next I activate my own Call of the Haunted." He said revealing the trap. "Come back Dark Blade!"

The knight rose back up and entered a stance. "Next I build the overlay network once again!"

The two monsters flew into the portal and this time lightning began to flash.

"Formed from pitch-black darkness, to fight those foolish enough to oppose it with its treacherous fangs! Now, descend! Xyz Summon! Rank 4! Dark Rebellion Xyz Dragon!" Julio yelled as a large purple and black dragon appeared with a spear like point on his chin. "Ready Dark?"

"Indeed I heard what he called Kila he'll pay!" Dark growled in response. Oh yeah Julio and Dark share a bond strong enough they can speak to each other plus Julio had the capability to see duel spirits anyway.

Dark Rebellion Xyz Dragon

ATK: 2500 DEF: 2000

Rank: 4 Dark

Dragon/Xyz/Effect

"Alright first Second Booster's effect by sending it to the graveyard I can boost a monster's ATK by 1500!" Julio declared as the jet flew to Dark Rebellion and equipped itself to his back causing him to roar.

Dark Rebellion Xyz Dragon ATK: 2500 + 1500= 4000

"Next Dark's ability by removing two overlay units I can target one monster you control and it loses half of its attack and increases Dark Rebellion by that much. Treason Discharge!" Julio yelled as Dark sent purple lightning towards Armed Dragon and cut its attack and raised Dark's.

Dark Rebellion Xyz Dragon ATK: 4000 + 1500= 5500

Armed Dragon LV 10 ATK: 3000/2= 1500

"Battle! Dark Rebellion attacks Armed Dragon!" Dark rose up and lightning spread along his wings and soon to the spear on his chin and shot forward.
"I banish my Necro Gardna I sent to the Grave with Armed Dragon's effect to negate the attack and save my dragon." Kent said desperately as a large humanoid with long white hair and red and black armor appeared to block the attack but Julio smirked.

Necro Gardna

ATK: 600 DEF: 1300

Level: 3 Dark

Warrior/Effect

"I activate the Quick-Play spell from my hand Effect Shut it negates a monster's effect and destroys it!" Julio said playing the card from his and revealing the art to show a cage around a monster stopping it's ability.

Effect Shut

Spell/Quick-Play

"Dark Rebellion end this duel. Revolt of the lightning! Disobey!" Julio yelled as Dark slammed his fangs through Armed Dragon causing an explosion. Kent let out a yell as he flew back onto his back.

KENT LP: 2600 - 4000=0

WINNER: JULIO

"And that's what you get for insulting my friend." Julio said patting Dark before he faded away.

"Y-You demolished me." Kent said in shock.
"Course he did." Dan said walking towards Kent. "He is the number one in our year."

"Yep though it's like a coin flip between the three of us in a duel." Kila said and the two boys pondered a bit before nodding in agreement.

"I'll get you back for this." Kent said getting off and walking away.

"Now that was a duel." Terrence said with a grin. "For that duel any amount of cards you guys get is half off today."

"Hell Yeah!" The three declared before heading back to the store. Unknown to them however a small orb was watching them.
"Hmm he shows great potential." A heavenly voice said to herself. "Yes he's perfect now it's time to hope that he can help save Gamindustri. Better hope he can deal with Neptune and the others though."
AN: And that's the prologue done. Pretty long for one and we already have a duel in which Julio shows his skill and ace. Now some of you may be thinking is Zarc gonna be a thing? And the answer is NO! Dark Rebellion is just his ace and how he got Dark Rebellion will be answered in the future but I will include the other heavenly dragons later but Julio won't be getting them except for maybe the xyz ones like Raging but that remains to be seen. Now regarding Nep and the others. No they're not gonna be duelists but they are gonna be duel monsters. Thats right I'm gonna make some custom cards for them. Onto Julio's main extra deck summoning. He's not just Xyz in fact I'm making Nep and the others effect monsters and HDD synchro as for what human characters will appear I can assure you IF and Compa will appear as cards but the rest remains to be seen. How it will work remains to be seen.

Now I actually got inspiration for this from a fic with RWBY and Yu-Gi-Oh by a guy named MaxGundam1998. I found his fic very interesting and decided to give my own spin on it Nep style. Go check out his fic I highly recommend it if you enjoy Yu-Gi-Oh or RWBY.

Also yes Kila is in the fic because she's honestly my favorite OC that I've made even over Julio and I'm sure it's easy to tell what type of deck she'll be using. The timeline for this is that it's set after the true ending for Megadimension Neptunia Vii. Also leave your suggestion about who Julio should be shipped with and NO! It's not a harem this time.

Julio's deck is gonna feature warriors primarily with the exception of cards like Second Booster or Luster Dragon and obviously Dark Rebellion. He relies on cards to stall and boost his monsters and has a few cards to summon monsters more than once to help Xyz summon his monsters. Dark Rebellion is his favorite monster and his duel spirit.

MVP Of the chapter: In this section we will be going over the card that did the most work in the chapter though they will only ever be featured once. In this one we have:

Dark Rebellion Xyz Dragon. He is a rank four dragon type monster that is easy to summon and has a simple yet devastating effect. He can drain half the attack of a monster for the cost of two overlay units and gain the attack lost permanently so long as he's on the field. This is also Julio's ace.

Please leave a review with your thoughts, suggestions, ideas, and ways to improve this. Also if you have any deck suggestions go ahead and send it to me either in a review or PM and I'll see what I can do. If you want to see more let me know so I can feel motivated to update this sooner than I plan. Criticism is accepted but flames are not.

Next chapter name: Goddess awaken!