How come the Ace of Cups isn't considered the Holy Grail?

Ereshkigal places the cards retrieved from the Duel Disk into the Graveyard.

"I send the Level 8 [Dead King's Evil Eye] from my deck to the graveyard! Then I activate the Continuous Spell Card [Call of the Mummy] from my hand and activate its effect!"

"Once per turn, during my Main Phase, I can Special Summon 1 Zombie Monster from my hand!"

The upright cards followed Ereshkigal, emitting a series of calls, eventually summoning a dragon with ghostly blue flames burning on its back and a card in its mouth.

"I Special Summon [Spectral Wyvern of the Blazing Inferno] from my hand!"

【Fire Wyvern and Ghost Wyvern】

【4 stars】

[Undead/Dark]

[Attack power: 1700]

"If this card is Normal or Special Summoned, I can add 1 [Spectral Fusion] from my Deck to my hand!"

Because of the D-wheel's autopilot mode, Ereshkigal could confidently let go of the handlebars and take the card from the Ghost Wyvern's mouth.

Then she took out a card from her hand and placed it in the monster zone of the Duel Disk.

"I Normal Summon [Singing Zombies] from my hand!"

[Singing Zombies Together]

【3 stars】

[Undead/Dark]

[Attack power: 1300]

"Activate the monster effect of [Singing Zombie]! Discard one card from your hand, then target [Singing Zombie] on the field and increase its Level by 1!"

[Singing Zombies Together]

[3 stars → 4 stars]

In the lake, a figure resembling Ma Mian from the mythical ox-headed and horse-faced demons flashed by, the axe blade in its hand hooking up the phantom of the [Evil Eye of the Necromancer King] that had previously sunk into the lake.

Ereshkigal: "Activate the monster effect of [Horse-Headed Demon] which was just sent to the Graveyard, banish this card, and Special Summon [Dead King's Evil Eye] from the Graveyard in Attack Position!"

The phantom gradually solidified as it landed beside Ereshkigal. Its enormous body, with even part of its tail still in the lake, gave off an even more dangerous feeling than Ereshkigal's previous massive Garula spirit shell.

[The Evil Eye of the Necromancer King]

【8 stars】

[Undead/Dark]

[Attack power: 2800]

"At this very moment! Activate another effect of the field spell [Lure Δ]!"

From the crimson lake, a shadow that looked exactly like the [Evil Eye of the Necromancer King] emerged from the bottom of the lake.

Ereshkigal's explanation followed immediately.

"This effect can only be activated if there is a Zombie-Type monster on the field. Special Summon 1 [Δ Token] to my field!"

[Δ derivative]

【5 stars】

[Undead/Dark]

[Defense: 0]

"It's not over yet! Now, let's activate the second effect of [Singing Zombies]!" Ereshkigal continued, "Target it and send [Banshe of the Corpse World] from your deck to the graveyard. This card's Level increases by 1!"

[Singing Zombies Together]

[4 stars → 5 stars]

"Then comes the effect of [Banshe of the Corpse Realm], who was just sent to the graveyard!"

Ereshkigal retrieved the card of [Banshee of the Corpse World], which had just been sent to the graveyard, and a phantom image of a white-haired girl in a white dress appeared on the field.

She simply waved her hand, and countless blue spheres, seemingly souls, flew out from her body and scattered into every corner of this world.

"I banish this card from my graveyard and activate one 'Undead World' from my Deck!"

The underworld returns.

Surrounded by numerous souls, the world that belonged only to the dead returned, and the newly formed lake dried up.

Deathly energy filled every corner of the world, and countless souls in the audience became active. Fujimaru Ritsuka also felt that familiar, chilling feeling wrap around her again.

She instinctively hugged her arms, as if she could feel the same low temperature she had experienced in the underworld.

"Senior, are you okay?"

Mashu was the first to notice that something was wrong with Fujimaru Ritsuka beside her and quickly asked her with concern.

Unfortunately, she is currently in a semi-Servant state, only wearing a suit of armor, otherwise she could have taken off her coat and draped it over Fujimaru Ritsuka.

“It’s nothing, Mashu.” Holding her arms, which had become cold, Fujimaru Ritsuka shook her head. “I just have a really bad feeling about this place.”

"Well, after all, just from the name 'Undying World,' you can tell it's not a place suitable for the living."

Merlin, who was sitting in the back, came closer.

“We are all heroic spirits now, belonging to the ranks of the dead, so we don’t feel anything special. It’s only natural that you, Fujimaru, as a living person, would feel uncomfortable in this environment!”

"is that so……"

Fujimaru Ritsuka understood and stopped dwelling on the issue, turning her attention back to the arena.

At this moment, Ereshkigal raised the last card in his hand.

That was the [Ghost Fusion - Ghost Fusion] that she retrieved using the Ghost Wyvern.

"I activate the Spell Card [Spectral Fusion] from my hand! I use [Spectral Wyvern of Blazing Inferno] and [Δ Token] on my field as Fusion Materials!"

"The summoning condition is two undead monsters!"

Ereshkigal stretched his hand forward with his five fingers spread, as if he were trying to grasp something, and said loudly.

"Responding to the call of the mistress of the underworld, come from the depths of the underworld! Fusion Summon!"

"Level 8! [Netherworld Dragon's Death]!"

Before the pitch-black vortex of fusion, seven stone doors that felt familiar to You Du fell one after another, with a huge dragon claw reaching out first, followed by a cold, eerie, and oppressive aura.

Its massive body was covered in purplish-red dragon scales, making it look like exposed flesh and blood restrained by white bones, giving the dragon's body a set of bone armor.

[The Underworld Dragon Dies]

【8 stars】

[Dragon Race → Undead Race/Darkness]

[Attack power: 3000]

"Ugh...this dragon looks really unsettling..."

Ishtar gave a disdainful look at the figure of [Dragon of the Underworld] on the broadcast screen.

"But it does fit Ereshkigal's temperament quite well. That guy has been in the underworld for so many years, he's probably been pickled in the aura of the underworld, just like this dragon!"

Perhaps because she has now regained her divine status and restored her body size, Ishtar seems to have become much bolder.

However, this was also because she knew that Ereshkigal in the arena couldn't hear her. Otherwise, even if she regained her body size and divine status, she would only relive her experience of her first descent into the underworld.

Anna glanced at Ishtar, who was sitting next to her for some reason, and silently pulled down her hood.

Before Ereshkigal had finished her turn, after summoning [Dragon of the Underworld], she immediately turned it and the [Singing Zombie] on the field into two dark purple orbs of light.

"Connection confirmed! ←→! Summoning condition: 2 Undead Monsters!"

"Open! The path to the underworld!"

Two beams of light flew into the circuit that opened in the air, illuminating the two arrows on the left and right respectively. Ereshkigal took a card from the Extra Deck and placed it on the left Extra Monster Zone.

"Connection Summoning! L-ink2!"

"【The Wandering Ghost Ship】!"

A faint sound of waves arose, and a dilapidated wooden ship, with iron spikes covering its bow and perfectly resembling a ghost ship from a movie, appeared out of nowhere.

Just as a ferry riding a D-wheel can create roads out of thin air, this ship also created oceans out of thin air for navigation.

The Wandering Ghost Ship

【L-ink2】

[Undead/Water]

[Attack power: 0]

Using a monster with 3000 attack power and a monster with 1300 attack power as materials, just to summon a monster with 0 attack power?

Others might find this unbelievable, but You Du immediately became alert.

This ship's attack power is actually 0!

"Activate the monster effect of [Wandering Ghost Ship]!"

I target the Level 8 "Dragon of the Underworld" in my Graveyard, and place "Wandering Ghost Ship" as a Continuous Spell Card in the Spell & Trap Zone to Special Summon "Dragon of the Underworld"!

The [Dragon of the Underworld], which had just been sent to the graveyard as material, was brought out by the Ghost Ship, which then went to Ereshkigal's back row.

"This is the end of my turn!"

Having used up all his cards, Ereshkigal chose to end his turn.

"Alright, it's your turn, Heroic Spirit!"

Field Spells include [Undead World], [Necromancer's Eye], and [Underworld Dragon's Death], as well as [Wandering Ghost Ship], a Continuous Spell Card with an unknown effect...

Yudu's gaze swept across the cards on the field in Ereshkigal.

"My turn, draw a card!"

Yuuto drew a card and then played it without hesitation.

"I activate the Continuous Spell [Synchronization Dilemma] from my hand!"

A green card, as tall as a person, stood up beside Youdu.

"Based on its effect, I can send 1 'Synchronizer' monster from my hand and face-up monsters on the field to the Graveyard, and then Special Summon 1 monster from my hand!"

"I send the Tuner monster [Stardust Synchron] from my hand to the Graveyard to Special Summon [Doppelganger Warrior]!"

Adjust the monster?

Is it a Synchro Monster deck?

Ereshkigal guessed to himself.

A soldier in black, carrying a rifle, appeared on the field of the voyage, hovering near the ground and moving at the same speed as the voyage's D-wheel.

【Doppelganger Warrior】

【2 stars】

[Warrior Race → Undead/Dark Race]

[Attack power: 800]

The overwhelming death energy immediately enveloped the [Doppelganger Warrior] upon his appearance, transforming him into a skeleton soldier. This scene left the audience members somewhat puzzled.

"The race of monsters at the swimming pool... has changed?"

Fujimaru Ritsuka frowned as she looked at the [Doppelganger Warrior], which had become an undead creature. Its distinct features quickly reminded her of the [Undead World].

At that moment, Ereshkigal also snorted.

"Hmph, have you felt the terror of the underworld? Heroic spirits, this is a world that belongs only to the dead, and no living being is allowed to exist here!"

While the "Undying World" is on the field, all monsters on both players' fields and in their Graveyards become Zombie-type!

Knowing the effects of the [Undying World] beforehand, Yuwatari wasn't particularly surprised. He simply picked up the [Doppelganger Warrior] from the field and placed it in the graveyard.

"Activate the monster effect of [Stardust Synchron] in my Graveyard! Tribute [Doppelganger] on my field to Special Summon this card!"

The black soldiers left the field, and in their place stood a small mechanical dragon that looked like a juvenile Stardust Dragon.