Cabba sat at the makeshift table in the training grounds of Universe 6, carefully laying out a stack of Yu-Gi-Oh! cards he had acquired from a mysterious trader during a visit to Universe 7. The intricate artwork and complex mechanics of the game fascinated him, and he couldn't wait to share it with his fellow Saiyans.

Kale watched quietly from the sidelines, curious but hesitant, while Caulifla lounged against a rock, arms crossed and an unimpressed look on her face.

"What's this supposed to be, Cabba?" Caulifla asked, raising an eyebrow. "You drag us out here for some dumb kid's game?"

"It's not dumb," Cabba defended, shuffling his deck. "It's a strategy game called Yu-Gi-Oh! It's really popular in Universe 7. You use these cards to summon monsters, set traps, and outsmart your opponent. It's about thinking ahead and—"

"Thinking ahead? Sounds boring already," Caulifla interrupted, rolling her eyes. "We're Saiyans! We fight with our fists, not some paper cards."

Kale fidgeted, glancing between the two. "Um, it does look kind of interesting... maybe we should give it a chance?"

Cabba brightened. "See? Kale's open-minded. You might like it too, Caulifla, if you just try."

Caulifla snorted. "Yeah, right. What's in it for me?"

Cabba sighed, realizing he needed to appeal to her competitive spirit. An idea struck him. "Okay, how about this: If you can beat me in a duel, I'll take you and Kale out for lunch and pay for two weeks."

Caulifla's ears perked up. "Two weeks, huh? You serious?"

"Absolutely," Cabba replied confidently. "But you have to actually learn the rules and play properly."

Caulifla smirked, stepping forward. "Fine. You're on. Let's get this over with so I can make you regret wasting my time."

Cabba began explaining the basics of the game while Kale listened intently, occasionally nodding. Caulifla, on the other hand, struggled to maintain her patience.

"So you have your Monster Cards, Spell Cards, and Trap Cards," Cabba explained. "The goal is to reduce your opponent's Life Points to zero. You can summon monsters to attack or defend, and the stronger your strategy, the better your chances of winning."

Caulifla tapped her fingers on the table. "Yeah, yeah. Get to the part where I win."

Kale leaned closer. "This one looks cool," she said, pointing to a card with a dragon on it.

Cabba smiled. "That's 'Blue-Eyes White Dragon.' It's one of the most iconic cards. Very powerful, but it requires tributes to summon."

"Tributes?" Caulifla asked, narrowing her eyes. "What's that?"

"You have to sacrifice weaker monsters to bring out stronger ones," Cabba said patiently. "It's all part of the strategy."

Caulifla groaned. "Sacrifices? Sounds like a hassle."

"Just try it," Cabba urged. "You'll get the hang of it."

After some initial grumbling and several false starts, Caulifla finally began to understand the basics of the game. Cabba decided it was time for a real duel. Kale sat nearby, watching eagerly.

"Alright, Caulifla, let's see what you've got," Cabba said as he drew his starting hand.

Caulifla smirked. "Prepare to lose, Cabba. I'm gonna wipe the floor with you."

Cabba summoned a defensive monster in his first turn, carefully setting a trap card as well. "Your move."

Caulifla grinned as she drew her card. "I summon 'Axe Raider' in attack mode and crush your weak monster!"

Cabba flipped his trap card. "Not so fast. I activate 'Mirror Force!' Your attack is reflected, destroying your monster."

Caulifla's jaw dropped. "What?! You can do that?"

"It's all about timing and reading your opponent," Cabba said, trying not to sound smug.

Caulifla growled. "Fine! I set a card and end my turn. Don't get cocky, Cabba."

The duel continued, with Cabba's strategy and experience giving him an edge. But to his surprise, Caulifla's natural instincts and aggressive tactics began to shine through. She summoned a powerful dragon, wiping out several of Cabba's monsters in one turn.

"How's that for strategy?" Caulifla said, grinning triumphantly.

Cabba chuckled. "Not bad, but this duel isn't over yet."

The match reached its climax as both players were down to their last few Life Points. Kale cheered from the sidelines, fully invested in the battle. Caulifla's eyes sparkled with excitement, completely forgetting her earlier disdain for the game.

"I activate 'Monster Reborn,' bringing back my 'Red-Eyes Black Dragon,'" Caulifla declared. "And I attack directly!"

Cabba grimaced as his Life Points hit zero. "You got me, Caulifla. Well played."

Caulifla threw her arms in the air, laughing. "Ha! I knew I'd win! Alright, Cabba, you owe me and Kale lunch for two weeks. Hope your wallet's ready!"

Cabba smiled, relieved that she had enjoyed herself. "Fair's fair. I'll keep my promise."

Kale clapped her hands. "That was so much fun! Maybe we can all play together again?"

Caulifla shrugged. "Eh, it's not bad... for a kid's game. But don't think this means I'm going easy on you next time, Cabba."

Cabba laughed. "I wouldn't expect anything less."

Meanwhile...

In the towering KaibaCorp headquarters, Seto Kaiba stood in his opulent office, glaring at his neatly arranged desk. His piercing blue eyes scanned the surface for the fifth time, growing more irritated by the second. His prized deck, the very heart of his dueling career, was nowhere to be found.

"Mokuba!" Kaiba barked, his voice echoing through the spacious room.

Moments later, Mokuba Kaiba, his younger brother, burst into the office. "What's up, Seto? Did something happen?"

Kaiba turned to Mokuba, his expression a mix of annoyance and concern. "My deck is gone. I had it here yesterday, and now it's vanished. Did you touch it?"

Mokuba's eyes widened in surprise. "No way! Why would I mess with your deck? You're always super protective of it."

Kaiba clenched his fists. "Exactly. That's why it doesn't just vanish. I don't lose things, Mokuba. Someone's stolen it, and when I find out who, they're going to regret it."

Mokuba tilted his head. "Maybe you just misplaced it? Or someone in the building accidentally moved it?"

Kaiba scoffed. "Do you think I'm the kind of man who misplaces things? No. This is deliberate. Whoever took my deck has no idea what kind of hell they've unleashed."

In Domino City, Joey Wheeler was pacing outside Yugi's game shop, running a hand through his messy blond hair. His usual carefree demeanor was replaced with frustration. Yugi, Téa, and Tristan stood nearby, watching Joey with a mix of concern and curiosity.

"I'm tellin' ya, Yug! My deck's gone! Poof! Vanished!" Joey exclaimed, throwing his hands up.

Yugi furrowed his brow. "Are you sure you didn't leave it somewhere, Joey? Maybe it's at your place?"

Joey shook his head vehemently. "No way! I always keep it in my duelin' case. It's like my second wallet, ya know? I had it yesterday, and now it's gone."

Tristan crossed his arms. "Weird. First time I've ever seen you this worked up over something other than food."

"Hey!" Joey shot back, glaring at Tristan. "This is serious! That deck's got all my best cards—Red-Eyes, Time Wizard, Baby Dragon... it's like losin' a piece of myself!"

Téa placed a reassuring hand on Joey's shoulder. "Don't worry, Joey. We'll help you find it."

Yugi nodded. "Yeah, we'll figure this out. It's strange, though. A missing deck isn't something that happens often."

Joey frowned. "Yeah, well, I'm hopin' it's just me and not some weird trend."