Traveling in reverse through the Yu-Gi-Oh! world with the MD system

The shark forcefully pulled out the card from the top of the deck, glanced at its appearance, and then slammed it onto its D-card panel.

"Excellent! I Normal Summon [Lantern Shark] from my hand!"

As the shark, its head and belly covered in hard armor, and even its belly flashing with bright lights, appeared on the field, it spoke again:

"When [Lantern Shark] is successfully Normal or Special Summoned, you can Special Summon Level 3 to Level 5 WATER monsters from your hand in Defense Position!"

As he spoke, the shark picked up one of the two cards remaining in his hand.

"What I'm summoning is this [Killer Frilled Shark]!"

Another card fell, and a monster that was entirely yellow, slender, and more like an eel or other fish than a shark appeared on the shark's field.

However, its small, sharp teeth and blade-like fins are quite intimidating. But...

"A Level 3 monster? But Shark, your [Lantern Shark] is a Level 4 monster, right? It can't be Xyz Summoned like that, can it?"

Seeing Yuma's confusion, the shark simply smiled coldly:

"No, Yuma, you're wrong! When [Lantern Shark] is Xyz Summoned as a Water-type Xyz Monster, its level can be used as Level 3 or Level 5!"

and……"

Picking up his last card, the shark slammed it onto his D deck.

"I have one last card here, [Sticky Shark]! When you have a Fish-Type, Sea Dragon-Type, or Aqua-Type monster Normal or Special Summoned to your field, you can Special Summon this card from your hand!"

Having exhausted its last hand of cards, the shark immediately raised its hand and began a new chant:

"Now, I'm stacking my Level 3 [Killer Frilled Shark], [Sticky Shark], and [Lantern Shark] on my field! I'm building a stacking network of three monsters! Xyz Summon!"

Show yourself! [Trident Sea Dragon God]!

The three monsters transformed into Xyz Material, immediately opening the Xyz Summoning portal and disappearing into it. Then, a male mermaid, seemingly with legs and a robust physique, clad in blue armor and wielding a trident, descended from the Xyz Summoning portal, bringing waves with him onto the shark's field.

But this monster's attack power...

"1800 points? That's alright, it shouldn't be enough to defeat [General Lala].

Seeing that the [Tri-Blade Sea Dragon God] only had 1800 attack power, Yuma couldn't help but breathe a sigh of relief. Now, the [General Shalala]'s attack power of 3800 was the guarantee that it would not be destroyed by the shark.

However, the shark doesn't think so:

"Yuma! This turn, I'm going to defeat all your monsters!"

"Shark, if you can do it, then give it a try!"

Upon hearing Yuma's response, the shark's lips immediately curled into a smile:

"Then, the effect of [Tri-Blade Sea Dragon God] activates! Once per turn, remove 1 Xyz Material, and you can target 1 face-up monster on the field, negate its effects until the end of this turn, and reduce its ATK by 800!"

Having said that, the shark pointed its finger at [General Shua Lala].

"And the monster I've chosen is, of course, [General Shalala]!"

"not good!"

Upon hearing this effect, Yuma's face immediately turned pale. He had never heard of a monster like this in the hands of the shark, and this effect was also a fatal blow to [General Shalala].

The next second, [Trident Sea Dragon God] raised the trident in his hand, and a wave of sea, under its control, wrapped around [General Shuala].

[General Shua Lala's] attack power also plummeted from 3800 points to a mere 1200 points in that instant.

"Then, let's fight, Yuma!"

Just as [General Shuala's] attack power decreased, the shark continued pointing at [General Shuala] and saying,

"[Trident Sea Dragon God], attack [General Shua Lala]!"

Seeing that the shark intended to defeat [General Shalala], and thinking that as long as [General Shalala] recovered its attack power in the next turn, it would definitely be able to defeat [Trident Sea Dragon God] again, Yuma immediately opened his back row face-down card:

"Then I activate a trap card, [half damage, doesn't break]..."

However, this time, before Yuma could even explain the effect of his invincible [Halving], the shark's last face-down card was revealed:

"Don't even think about it! Yuma, do you think I'm unprepared? I've seen your [Halving Unbreakable] many times before! I'm launching a counter-trap [Deep Sea King's Declaration]!"

As the card was turned over, the shark said menacingly,

"This card can only be activated when your opponent activates a Trap Card during the Battle Phase! Negate the activation of that Trap Card and destroy it!"

"What!?"

Immediately afterward, to Yuma's astonishment, a violent vortex of waves burst forth from the card, shattering the [Halving Unbreakable] card he had just opened.

Meanwhile, the [Three-Blade Halberd Sea Dragon God], riding the waves, successfully thrust his three-bladed halberd into the chest of [General Shuala].

However, General Shuala, whose chest was pierced by the three-bladed halberd of the [Three-Blade Sea Dragon God], did not shatter on the spot. Instead, his body was gradually swallowed up by a dark crack that appeared behind him.

"This is……"

Seeing this strange phenomenon, Yuma couldn't help but ask a question, and the shark bluntly told him the reason.

"This is another effect of [Tri-Blade Sea Dragon God]! Monsters destroyed by battle by this card will not be sent to the Graveyard, but will be banished!"

After checking the graveyard, Yuma found that, as Shark had said, there were only a few Xyz Materials and the [I Am I Am the Emperor] as an Equip Card in the graveyard, but there was no trace of [Swap Lala General].

Then, the shark turned its dangerous gaze toward [Mech Ninja Red Shadow]:

"Then next, [Sea Bite Dragon Shark], attack [Mech Ninja Red Shadow]! [Deep Sea Bite]!"

[Sea Bite Dragon Shark] opened its mouth, and a blue energy condensed in its mouth. Then, as [Sea Bite Dragon Shark] shook its head, the blue energy instantly transformed into sharp teeth and bit down on [Mech Ninja Red Shadow].

The shark watched as Yuma's LP, after being attacked by the [Trident Sea Dragon God], dropped from 3400 points to 3000 points with that bite, and immediately clenched its fist in excitement:

"Excellent! At this moment, I activate the effect of [Sea Bite Dragon Shark Dragon] (original)! When this card attacks and destroys a monster on your opponent's field and sends it to the Graveyard, you can remove 1 Xyz Material, reduce that monster's original ATK by 1000, and Special Summon it to your opponent's field in face-up Attack Position!"

Then, during the Battle Phase after that, [Sea Bite Shark] can only attack the monster Special Summoned by this effect once!

However, [Sea Bite Shark] remained standing still, without making any move, which made the shark frown.

"Why……"

"Because [Mech Ninja Red Shadow] wasn't destroyed in the battle just now!"

Upon hearing Yuma's sudden voice, Shark immediately looked up and saw [Mech Ninja Red Shadow] appear on Yuma's field in a hand seal posture amidst a sudden burst of smoke.

However, of its original two overload materials, only one remains.

"[Mech Ninja Red Shadow] (original) effect: If this card is to be destroyed, you can remove 1 Xyz Material to negate that destruction!"