Yu-Gi-Oh! - Episode 098

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Yu-Gi-Oh! - Episode 098

未知なる挑戦者 巨大機動要塞浮上!


Michinaru Chōsensha Kyodai Kidō Yōsai Fujō!

Japanese translation

The Unknown Challenger - The Giant Mobile Fortress Surfaces!


A Virtual Nightmare

Episode number


Japanese air date

March 12 2002

English air date

November 1 2003

Japanese opening


Japanese ending


Episode listing Yu-Gi-Oh! episode listing (season 3)
Previous Showdown in the Shadows, Part 2
Next Isolated in Cyber Space, Part 1

A Virtual Nightmare, known as The Unknown Challenger - The Giant Mobile Fortress Surfaces! in the Japanese version, is the 98th episode of the Yu-Gi-Oh! television series. It is the Season 3 premiere, as well as the beginning of the Virtual World arc.

Before the Battle City semi-finals can commence, Seto Kaiba's blimp is suddenly commandeered by a mysterious boy named Noah, who seems to know Seto personally and reveals that he has forged an alliance with Seto's old foes, the Big Five.


The KaibaCorp blimp is en route to KaibaCorp Island (Alcatraz in the Japanese Version) when it suddenly changes course after the autopilot is hacked. A mysterious boy calling himself Noah communicates through a video message, claiming to be in control and appearing to know a lot about Kaiba despite Kaiba never having met him. The blimp docks in a fortress emerging from the ocean and is locked down by magnetic anchors.

Noah forces the gang (Kaiba, Mokuba, Yugi, Joey, Téa, Tristan, Duke and Serenity) into the fortress. There they encounter some old foes — KaibaCorp's former Board of Directors, The Big Five, who inform them that after they were defeated in Duel Monsters by Kaiba and Yugi, their bodies had been destroyed and their minds trapped in cyberspace (at the end of the Legendary Heroes mini-arc). Noah had later hacked into KaibaCorp's mainframe and uploaded The Big Five's minds into his own Virtual World so they could team up and take revenge on Kaiba.

Now, they propose a challenge to Yugi, Kaiba and the rest of the group: A Duel Monsters tournament within the virtual world. If any of them lose a Duel to one of The Big Five, the winner will gain control of their body and escape to the real world while the loser's mind will be trapped in the virtual world.

For the tournament The Big Five introduce a new set of rules where each duelist will have a Deck Master. The group are briefly sent to a preview of the virtual world so they can watch a virtual Duel between Kaiba and "Total Defense Shogun" using the Deck Master system. The Big Five explain the rule of an automatic loss if the Deck Master you choose is destroyed. And, to even the odds in their favor, The Big Five declare that they will be Dueling everyone currently present before them.

Featured Duel: Simulated Seto Kaiba vs. Total Defense Shogun

Deck Masters

Simulated Seto Kaiba: "Blue-Eyes White Dragon"
Total Defense Shogun: Itself

Turn 1: Simulated Kaiba
Simulated Kaiba Normal Summons "Lord of D." (1200/1100) in Attack Position. He then activates "The Flute of Summoning Dragon" to Special Summon 2 "Blue-Eyes White Dragons" to the field (3000/2500 for both) in Attack Position. Next Simulated Kaiba moves his Deck Master to the field (3000/2500) and places it in Attack Position. Simulated Kaiba then activates "Polymerization" to fuse his 3 "Blue-Eyes White Dragons" together and Fusion Summon "Blue-Eyes Ultimate Dragon" (4500/3800) in Attack Position. The latter monster now becomes Simulated Kaiba's new Deck Master. Due to the Deck Master ability of Simulated Kaiba's Deck Master, it can attack in the turn it is summoned.

"Blue-Eyes Ultimate Dragon" attacks directly, but "Total Defense Shogun" activates its own Deck Master ability, paying 1000 Life Points (Total Defense Shogun 4000 → 3000) to negate the attack and destroy the monster who targeted it in battle (In this case, "Blue-Eyes Ultimate Dragon").[Notes 1] Since his "Blue-Eyes Ultimate Dragon" Deck Master was destroyed, Simulated Kaiba automatically loses the Duel.

Featured cards

The following cards appeared in this episode. Cards in italics debuted here.

Simulated Seto Kaiba
Total Defense Shogun


  • This episode is technically the first time a Zero Turn Kill was shown in the anime.


  1. The mention of paying Life Points is removed from the English dub.

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