Yu - Gi - Oh ! - Episode 197 " Sinister Secrets , Part 2 " is the one - hundred and ninety - seventh episode of the " Yu - Gi - Oh ! " anime . It first aired in Japan on March 24 , 2004 and in the United States on October 8 , 2005 . Summary . Leon manages to gain the upper - hand in the Duel and explains that he found consolation in fairy tales when no - one would mind him , and was fascinated by them . He wrote a letter to Pegasus and asked him to produce " Fairy - tale - themed " cards . Yami Yugi makes a comeback by using " Mirror Force " , but Leon quickly Special Summon s two of the destroyed monsters . Rebecca remarks that Leon ' s strategy is strong , and that she is unable to see any flaws on it . Yami Yugi then uses a combo to quickly Summon " Dark Magician Girl " , which is one of Leon ' s favorite monsters . Leon draws and activates the Field Spell Card given to him by Ziegfried , " Golden Castle of Stromberg " . When he does , his Duel Disk frizzles , which catches the attention of Seto Kaiba , Professor Hawkins and Solomon Moto . Solomon and the Professor admit knowing about the card , but weren ' t expecting it to show up in such a place . Duke has a hunch , which is confirmed : " Golden Castle of Stromberg " was a single - print rare card made by Pegasus for test purposes and prestige only . It was the reward in a tournament ( named " Fall Cup Duel Project " in the Japanese version ) several years ago , and was never meant to be released or played in tournaments . Seto notes that with the influences of the Schroeder family , getting it must ' ve been easy . Mokuba adds that , since the card holds such a status , the " Solid Vision System " should have never accepted it . However , he realizes something , which Seto confirms : the Duel Computer ' s Limiter has been tampered with so that it ' s recognized as a legal card . Kaiba demands to know if that was Zigfried ' s true goal , which Zigfried responds to by shrugging . Zigfried smugly thinks to himself that Kaiba can ' t escape his trap . After finding out his card is illegal , Leon looks unsure . Zigfried tries to assure him by claiming that , since the card is on the field , it ' s now legal and winning is what matters for their family . Yami Yugi accuses Zigfried of staining both the Duel and the " souls of us Duelists " , saying he doesn ' t have the qualification to be a Duelist . Zigfried disregards the accusation , seeing Duel Monsters as being a mere game . Yami Yugi claims that he ' s stained the sanctity of the entire tournament : the Duelists who took part in this tournament and everyone who came to cheer , the fans of Duels scattered around the world and the heart of Leon , who was fighting for his sake . Zigfried sees it as " playing the hero " and tells Yami Yugi that he ' s " not mature enough " . Leon tells Zigfried that it ' d seem he doesn ' t believe in him after all , and that ' s why he ' s doing this . Leon refuses to play foul , so he activates " Mystical Space Typhoon " to destroy it . However , since " Golden Castle of Stromberg " cannot be destroyed by Spell and Trap Cards , it fails . Solomon and the Professor catch on : the card ' s text data has been rewritten . Suddenly , a nearby TV screen frizzles . Zigfried asks Kaiba to remove the limiter if he thinks it really bothers him so much , as the card itself is a switch . Upon its activation , a virus program is engaged . Kaiba orders from the anti - virus program to be engaged , but Zigfried deems it to be too late : all programs will be erased at a great speed , and all of the Duel monsters data will be gone . Leon , taken aback , tries to surrender the Duel , but Zigfried claims that it won ' t halt the virus . There ' s only one way to stop it : destroy the Golden Castle ! Yami Yugi encourages Leon to keep on , and he promises to find a way to destroy it . He rallies for him to show Zigfried " the glory of Duelists " and claims that they ' ll get rid of this infamous trap . Featured Duel : Yami Yugi vs . Leon von Schroeder . " Duel continues from previous episode . " Yami Yugi has 4000 Life Points remaining and controls " Obnoxious Celtic Guardian " ( 1400 / 1200 ) in Attack Position . Leon has 3700 Life Points remaining and controls " Forest Hunter " ( 1200 / 800 ) , " Iron Hans " ( 1200 / 800 ) , and " Iron Knight " ( 700 / 700 ) in Attack Position . Turn 5 : Leon von Schroeder Leon activate s " Iron Cage " to destroy " Iron Hans " ( " Iron Knight " : 700 → 1700 / 700 ) . " Iron Knight " attack s and destroy s " Obnoxious Celtic Guardian " ( Yami Yugi 4000 → 3700 ) . " Forest Hunter " attacks directly ( Yami Yugi 3700 → 2500 ) . Turn 6 : Yami Yugi Yami Yugi draws " Mirror Force " ( Yugi ' s Deck : 33 → 32 ) . He Normal Summon s " Queen ' s Knight " ( 1500 / 1600 ) in Attack Position . " Queen ' s Knight " attacks and destroys " Forest Hunter " ( Leon 3700 → 3400 ) . Yami Yugi Set s one card . Turn 7 : Leon von Schroeder Leon draws . On Leon ' s Standby Phase , the second effect of " Iron Cage " Special Summon s the destroyed " Iron Hans " from his Graveyard ( 1200 / 800 ) in Attack Position and destroys itself ( " Iron Knight " : 1700 → 700 / 700 ) . The effect of " Iron Hans " activates , Special Summoning one " Iron Knight " from Leon ' s Deck ( 1700 → 700 / 700 ) in Attack Position . Leon activates " Spinning Wheel Spindle " to destroy " Queen ' s Knight " . Three turns after the activation of " Spinning Wheel Spindle " , " Queen ' s Knight " will be returned to Yami Yugi ' s side of the field . " Iron Hans " attacks directly , but Yami Yugi activates his face - down " Mirror Force " to destroy all of Leon ' s Attack Position monsters . Leon then activates " Water of Life " to revive " Iron Hans " ( 1200 / 800 ) in Attack Position . The effect of " Iron Hans " then activates , Special Summoning one " Iron Knight " from Leon ' s Deck ( 1700 → 700 / 700 ) in Attack Position . Turn 8 : Yami Yugi Yami Yugi draws " Pot of Greed " ( Yugi ' s Deck : 32 → 31 ) and subsequently activates it to draw two cards ( Yugi ' s Deck : 31 → 29 ) . One of the cards he draws is " Watapon " , so Yami Yugi Special Summon " Watapon " from his hand ( 200 / 300 ) in Attack Position . Yami Yugi then Tribute s " Watapon " to Tribute Summon " Dark Magician Girl " ( 2000 / 1700 ) in Attack Position . " Dark Magician Girl " attacks and destroys " Iron Knight " ( Leon 3400 → 2100 ) . Turn 9 : Leon von Schroeder Leon draws " Pot of Greed " and subsequently activates it to draw two cards . He then switches " Iron Hans " to Defense Position . Leon then activates " Golden Castle of Stromberg " . Leon then activates the first effect of " Golden Castle of Stromberg " to Special Summon " Cinderella " from his Deck ( 300 / 600 ) in Attack Position . Since " Cinderella " was summoned , its effect activates , Special Summoning one " Pumpkin Carriage " ( 0 / 800 ) from Leon ' s Deck in Defense Position . The second effect of " Cinderella " then activates , allowing Leon to activate one " Glass Slippers " from his Deck and equip " Glass Slippers " to " Cinderella " . " Cinderella " attacks directly via the effect of " Pumpkin Carriage " ( Yami 2500 → 2200 ) . Since " Cinderella " inflicted Battle Damage through a direct attack , the first effect of " Glass Slippers " activates , equipping itself to Yami Yugi ' s " Dark Magician Girl " and decreasing its ATK by 1000 ( " Dark Magician Girl " : 2000 → 1000 / 1700 ) . Upon discovering that " Golden Castle of Stromberg " is an illegal card that his brother made legal through hacking , Leon activates " Mystical Space Typhoon " to destroy it . However , the fifth effect of " Golden Castle of Stromberg " prevents its destruction by other card effects . " Duel concludes next episode . " Featured cards . The following cards appeared in this episode . Cards in italics debuted here .