Yu-Gi-Oh! - Episode 198

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"Sinister Secrets - Part 3"
EnglishSinister Secrets - Part 3
Japanese name
RōmajiKei Shī Guran Puri Shūketsu
TranslatedKC Grand Prix Ends
Japanese OP"OVERLAP"
Japanese ED"EYE'S"
English OP & ED"Yu-Gi-Oh! Theme"
Air dates
JapaneseMarch 31, 2004
EnglishOctober 8, 2005
Yu-Gi-Oh! episodes (season 5)
Previous"Sinister Secrets, Part 2"
Next"Tomb of the Nameless Pharaoh"

"Sinister Secrets - Part 3", known as "KC Grand Prix Ends" in the Japanese version, is the one-hundred and ninety-eighth episode of the Yu-Gi-Oh! anime. It first aired in Japan on March 31, 2004, and in the US on October 8, 2005.

The Duel between Leon von Schroeder and Yami Yugi continues. Zigfried is amused at Yami Yugi's claim that he will destroy "Golden Castle of Stromberg". Meanwhile, Kaiba has his own battle to fight: stopping the virus that has spread through his system.


As the final Duel of the KC Grand Championship continues, Zigfried reveals one of the effects of "Golden Castle of Stromberg": it forces both parties to battle, and when the opponent's monster is destroyed, the opponent shall suffer battle damage equal to half that monster's ATK points.

Meanwhile, Kaiba and Mokuba reach the control center and begin working on halting the virus program. Mokuba vows that he won't let Ziegfried get away with betraying his brother's trust.

Another effect of "Golden Castle of Stromberg" is soon revealed: the maintenance cost of this Field Spell Card forces the card's controller to send half of their Deck to the Graveyard. However, Zigfried has edited it so that the opponent had to pay the cost instead of the controller.

Elsewhere around the world, Duel Disk systems begin to malfunction as a result of the virus.

Yami Yugi barely survives an attack which would've cost him the Duel, and Special Summons an Effect Monster with an effect of destroying all of the opponent's cards. Unfortunately, it too fails, since Zigfried foresaw that possibility. However, Yami was aiming for something else: he's used all but 1 card in his Deck. Since the cost rounds down, he can only discard 0 cards, which is not actually considered paying the Field Spell Card's maintenance cost. "Golden Castle of Stromberg" is destroyed.

The virus is finally halted, and Kaiba realizes Yami Yugi found the weakness of the card. He orders for all systems to be linked to the backup ones and reboot it.

Despite getting rid of the Field Spell Card, Zigfried points out that almost all of the gaming data in KaibaCorp has been deleted thanks to the virus. He also points out that Yami Yugi has only one card left in his Deck and when he becomes unable to draw a card from his Deck, Leon wins by default. Leon does not want to defeat Yami Yugi due to what his brother did, so he tries to surrender the Duel, but Yami convinces they should continue the Duel now that the "Golden Castle" is gone. Even though Leon manages to Tribute Summon a very powerful monster, Yami Yugi, by Special Summoning "Dark Magician" and using a combo of "Necromancy" and "Diffusion Wave-Motion", is able to win the duel.

Yami Yugi consoles Leon: he fought his best and didn't give up until the very end. He tells him that he's a "true Duelist". Leon breaks down into tears. Zigfried, being the sore loser he is, claims that the virus program has already managed what he sought. Kaiba comes in and claims that he's already restored the main computer to normal.

Leon tries to reason with him: he tells him that he knew the whole thing was pointless. Zigfried collapses and mutters that, in the end, he can't win over Kaiba. Kaiba claims not just him, nobody can. Leon tries to explain what he's learned: if you give up, all's over. But if he keeps on moving forward with high spirits, someday, he can accomplish something. He wants to help him, and pleads of him to share his pains with him. Yami Yugi and Yugi are glad that things are finally resolved.

Yami Yugi's victory is announced worldwide as Weevil Underwood and Rex Raptor curse in Tokyo (as they wanted to be the ones to defeat Yami), and Mai Valentine looks on from another location.

Mokuba arranges for Yugi and co. to return to Japan with a KC plane. When Duke comments that he'd like to meet Serenity, both Joey and Tristan hold him in place and tell him off. The Professor tells Solomon "not to do anything reckless". Solomon plays strong, but his waist ache comes back. Rebecca tells Yugi that they must have a new Duel in the future.

Featured Duel: Yami Yugi vs. Leon von Schroeder[edit]

Duel continues from previous episode.

Yami Yugi has 2200 Life Points remaining and controls "Dark Magician Girl" (1000/1700) in Attack Position.

Leon has 2100 Life Points remaining and controls "Iron Hans" (1200/800) and "Cinderella" in Attack Position, "Pumpkin Carriage" (0/800) in Defense Position, and "Glass Slippers" (equipped to "Dark Magician Girl") and "Golden Castle of Stromberg".

Turn 10: Yami Yugi
Yami Yugi draws (Yugi's Deck: 29 → 28). The fourth effect of "Golden Castle of Stromberg" activates, forcing "Dark Magician Girl" to attack. "Dark Magician Girl" attacks Leon's "Pumpkin Carriage", but the fifth effect of "Golden Castle of Stromberg" then activates, destroying "Dark Magician Girl" and inflicting damage to Yami Yugi equal to half his monster's ATK (Yami 2200 → 1700). Since "Dark Magician Girl" was destroyed, the last effect of "Glass Slippers" activates, equipping itself to "Cinderella". The third effect of "Cinderella" activates when it is equipped with "Glass Slippers" from another monster, increasing her ATK by 1000 ("Cinderella": 300 → 1300/600). Yami Yugi Sets a card.

Turn 11: Leon von Schroeder
Leon draws. On Leon's Standby Phase, the Maintenance Cost of "Golden Castle of Stromberg" requires him to send half the cards in his Deck to the Graveyard. However, the last effect of "Golden Castle of Stromberg" transfers the cost to Yami Yugi (Yami Yugi's Deck: 28 → 14). Leon uses the effect of "Golden Castle of Stromberg" to Special Summon "Forest Wolf" from his hand (1800/300) in Attack Position.[Notes 1]

The third effect of "Golden Castle of Stromberg" then forces "Cinderella" to attack. "Cinderella" attacks directly (Yami 1700 → 400). The third effect of "Golden Castle of Stromberg" then forces "Forest Wolf" to attack. "Forest Wolf" attacks directly, but Yami Yugi activates his face-down "Dark Magic Retribution" to Special Summon "Dark Magician Girl" (2000/1700) from the Graveyard in Attack Position. "Dark Magician Girl" then intercepts the attack and destroys "Forest Wolf" (Leon 2100 → 1900). On Leon's End Phase, the last effect of "Dark Magic Retribution" destroys "Dark Magician Girl".

Turn 12: Yami Yugi
Yami Yugi draws (Yugi's Deck: 14 → 13). Since it has been three turns since "Spinning Wheel Spindle" was activated, "Queen's Knight" is Special Summoned from Yami Yugi's Graveyard to his side of the field (1500/1600) in Attack Position. Yami Yugi Sets two cards. He then activates "Card of Sanctity" to force both players to draw until they both have 6 cards in their hands, letting Yami Yugi draw six cards while Leon draws two cards (Yugi's Deck: 13 → 7). Yami Yugi's hand at this point contains "King's Knight", "Multiply", "Emergency Provisions", "Royal Straight", "Chain Destruction", and "Time Travel".

Yami Yugi Normal Summons "King's Knight" (1600/1400) in Attack Position. Since Yami Yugi Summoned "King's Knight" while he had "Queen's Knight" on his side of the field, the effect of "King's Knight" activates, Special Summoning "Jack's Knight" (1900/1000) from Yami Yugi's Deck in Attack Position (Yami Yugi's Deck: 7 → 6).

Yami Yugi then activates "Royal Straight" to Tribute "Queen's Knight", "King's Knight" and "Jack's Knight" and Special Summon "Royal Straight Slasher" from his Graveyard (2400/1350) in Attack Position. Yami Yugi then activates the effect of "Royal Straight Slasher" to send "Kuriboh" (Level 1), "Old Vindictive Magician" (Level 2), "Giant Soldier of Stone" (Level 3), "Big Shield Gardna" (Level 4) and "Curse of Dragon" (Level 5) from his Deck to the Graveyard and destroy all cards Leon controls (Yami Yugi's Deck: 6 → 1). "Iron Hans", "Cinderella", "Pumpkin Carriage", and "Glass Slippers" are destroyed, but "Golden Castle of Stromberg" remains on the field because it cannot be destroyed by other card effects. Yami Yugi then activates "Time Travel" to remove his "Royal Straight Slasher" from play until Leon's next Standby Phase.

Turn 13: Leon von Schroeder
Leon draws. On Leon's Standby Phase, the Maintenance Cost of "Golden Castle of Stromberg" requires him to send half the cards in his Deck to the Graveyard. However, the last effect of "Golden Castle of Stromberg" transfers the cost to Yami Yugi. However, Yami Yugi reveals he cannot pay the cost with only one card left in his Deck, so "Golden Castle of Stromberg" is destroyed. At the same time, "Royal Straight Slasher" returns to Yami Yugi's side of the field (2400/1350) in Attack Position via the effect of "Time Travel".

Leon, at this point, tries to surrender, but Yami Yugi convinces him not to. Leon activates "Monster Reborn", Special Summoning "Cinderella" from his Graveyard (300/600) in Attack Position. Since "Cinderella" was Summoned, its effect activates, Special Summoning "Pumpkin Carriage" from Leon's Graveyard (0/300) in Defense Position. Leon then Tributes "Cinderella" and "Pumpkin Carriage" in order to Tribute Summon "Hexe Trude" (2600/2100) in Attack Position. "Hexe Trude" attacks and destroys "Royal Straight Slasher" (Yami Yugi 400 → 200). Since "Hexe Trude" destroyed a monster by battle, its effect activates, increasing its ATK by 400 ("Hexe Trude": 2600 → 3000/2100).

Turn 14: Yami Yugi
Yami Yugi draws "Monster Reborn" (Yugi's Deck: 1 → 0). His hand now contains "Monster Reborn", "Emergency Provisions" "Multiply", and "Chain Destruction". Yami Yugi then Sets a card. He then activates "Emergency Provisions" to send his Set card ("Chain Destruction") to the Graveyard and gain 1000 Life Points (Yami 200 → 1200). Yami Yugi then activates "Monster Reborn" to Special Summon "Dark Magician" (2500/2100) from his Graveyard in Attack Position.

Yami Yugi then activates his face-down "Necromancy" to Special Summon "Little Red Riding Hood" (800/1200), "Forest Hunter"(1200/800), "Iron Hans"(1200/800) and "Iron Knight" (1700 → 700/700) from Leon's Graveyard to his side of the field in Defense Position. If any of these Summoned monsters are destroyed, all of Leon's monsters will lose 600 ATK for each one destroyed until the End Phase.

Yami Yugi then activates his face-down "Diffusion Wave-Motion" to pay 1000 Life Points (Yami 1200 → 200) and allow his "Dark Magician" to attack all of Leon's monsters once each. "Dark Magician" attacks and destroys Leon's "Little Red Riding Hood", "Forest Hunter", "Iron Hans" and "Iron Knight" ("Hexe Trude": 3000 → 600/2100). "Dark Magician" then attacks and destroys "Hexe Trude" (Leon 1900 → 0).

Yami Yugi's Deck depletion[edit]


  • When Yugi activates the effect of "Royal Straight Slasher", the shot of him drawing six cards from the effect of "Card of Sanctity" is reused (with the cards on his duel disk changed appropriately). At that point, Yugi's Deck contains only 6 cards. While drawing his entire deck to choose the 5 monsters is appropriate, cards are still shown in the Deck slot of the duel disk. In addition, by viewing his entire deck, Yugi would have known for certain that the last remaining card in his deck is Monster Reborn (and consequently that he has a game-winning combo ready). However, he looks surprised when he draws it on the following turn.
  • During the scene when "King’s Knight", "Queen’s Knight" and "Jack’s Knight" put their swords together, all three monsters’ ATK are shown; the ATK of "King’s Knight" is incorrectly shown as 1900 when it is really 1600. This was corrected in the dub.

Differences in Adaptations[edit]

  • The dress of "Hexe Trude" was made less revealing in the dub.
  • Cut from the dub is a bit of two kids dueling in a park, using duel disks. One kid orders his "Ruiz" ("Beaver Warrior") to attack, but the hologram starts to flutter with static. The other kid's "Gremlin" ("Feral Imp") does the same, and the kid says something's wrong.

Featured cards[edit]

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


  1. This is an error, as the written Japanese lore of "Golden Castle of Stromberg" states its controller can only Special Summon a random Level 4 or below monster from the Deck.
  2. a b c d e This card was sent from Yugi's Deck to the Graveyard to activate the effect of "Royal Straight Slasher".
  3. a b This card was seen in Yugi's hand.