Katsuya Jonouchi and Dinosaur Ryuzaki ' s Duel ( manga ) Katsuya Jonouchi and Dinosaur Ryuzaki faced each other in a game of " Duel Monsters " in the preliminary stage of the Duelist Kingdom tournament , in the " Yu - Gi - Oh ! " manga . Events . Prior . Dinosaur Ryuzaki had previously lost a Duel to Mai Kujaku on the journey to Duelist Kingdom and wanted to beat her in a rematch to make up for his humiliation . Mai was also annoyed by one of her own defeats , having lost to Katsuya Jonouchi . When Ryuzaki confronted Mai , she had no interest in facing him a second time . However since she thought it would be immature to challenge Jonouchi to another Duel , she offered to Duel Ryuzaki again , if he first defeated Jonouchi . Her logic being that if Ryuzaki won and she defeated him , it would be equivalent to her beating both of them . She added the condition that Ryuzaki was to be her slave until the two of them Dueled . Although , Ryuzaki was not happy with that . The two of them tracked down Jonouchi and his friends . Mai said that she let Jonouchi win last time and that now she wanted him to Duel her slave . She introduced Ryuzaki , whom Jonouchi and Dark Yugi recognized as the runner - up of the Japanese nationals . Jonouchi accepted the Duel and Dark Yugi thought to himself that he would guide Jonouchi to victory . However Jonouchi then asked that Dark Yugi not give him any advice , as he wanted to be able to win on his own . Anzu Mazaki , Hiroto Honda and Ryo Bakura thought that this was a bad idea . However Dark Yugi understood and was happy to stay out of it , so he returned control of his body to Yugi Mutou . The players wagered two Star Chip s each . Jonouchi ' s field consisted mostly of Grassland and Ryuzaki ' s consisted mostly of Wasteland . Jonouchi was worried about Ryuzaki being a strong player , but had faith in his " Baby Dragon " and " Time Wizard " combo , which he used to defeat Mai . The Duel . 1st turn : Jonouchi Excited , by having drawn both " Baby Dragon " and " Time Wizard " in his opening hand , Jonouchi felt his victory was assured . Jonouchi Summoned " Baby Dragon " in Defense Mode . He mentally urged Ryuzaki to play whatever monster he wanted , as he planned on aging it with " Time Wizard " next turn . Ryuzaki Summoned " Two - Headed King Rex " in Attack Mode in the Wasteland , granting it a Field Power Source ( " Two - Headed King Rex " : 1600 → 2080 ATK ) . " Two - Headed King Rex " attacked and destroyed " Baby Dragon " . Ryuzaki laughed that Jonouchi could not just put out a card and expect his opponent to let him use a combo . Mai laughed and told Jonouchi to just try and age " Baby Dragon " after scraping it off the foot of " King Rex " . 3rd turn : Jonouchi Jonouchi Summoned " Battle Steer " and got it to attack " Two - Headed King Rex " , unaware of the Field Power Source " Two - Headed King Rex " had received . Consequently " Battle Steer " was destroyed ( Jonouchi : 2000 → 1720 Life Points ) . Jonouchi Summoned " Axe Raider " in the Grassland ( " Axe Raider " : 1700 → 2210 ATK ) . 4th turn : Ryuzaki Ryuzaki Summoned " Sword Dragon " in the Wasteland ( " Sword Dragon " : 1750 → 2275 ATK ) . " Sword Dragon " attacked and destroyed " Axe Raider " ( Jonouchi : 1720 → 1145 Life Points ) . 5th turn : Jonouchi Jonouchi began to think that he was not good enough to beat Ryuzaki and considered asking Yugi for help . However he reminded himself that he cannot always rely on Yugi and promised that he would win this Duel by himself . Jonouchi looked at the cards in his hand ; " Time Wizard " , " Swamp Battleguard " , " Rock Ogre Grotto # 1 " and another . He thought that none of them could defeat Ryuzaki ' s dinosaurs , but knew that " Time Wizard " had some powers he was unaware of , so he Set it in his Spell & Trap Card Zone , hoping it might come in useful . Mai deduced what card Jonouchi had just Set and informed Ryuzaki . However Ryuzaki had also figured it out and was not worried , as he knew Jonouchi did not know how to use the card . Jonouchi Summoned " Rock Ogre Grotto # 1 " in Defense Mode . 6th turn : Ryuzaki Ryuzaki Summoned " Megasaurus " in the Wasteland ( " Megasaurus " : 1800 → 2340 ATK ) and used it to attack and destroy " Rock Ogre Grotto # 1 " ( Jonouchi : 1145 → 1140 Life Points ) . 7th turn : Jonouchi Jonouchi Summoned " Swamp Battleguard " in Attack Mode . 8th turn : Ryuzaki " Sword Dragon " attacked and destroyed " Swamp Battleguard " ( Jonouchi : 1140 → 665 Life Points ) . Jonouchi ' s friends started to wonder if Jonouchi had any chance of winning . Anzu asked Yugi if there was anything Jonouchi could do . He explained that Jonouchi had a chance if he would " Time Wizard " , but it was risky and he was not sure if Jonouchi would even figure it out . Anzu , Bakura and Honda tried talking Yugi into telling Jonouchi what to do , but he wanted to honor Jonouchi ' s request to not get any help . By reminding him that Jonouchi would not be able to save Shizuka if he lost , Yugi decided to help . However Dark Yugi stopped him and explained that Jonouchi was fighting a battle with himself and would lose if he needed help . He also noted the confidence in Jonouchi ' s eyes , saying that they were not the eyes of someone about to give up . 9th turn : Jonouchi Jonouchi Summoned " Flame Swordsman " in the Grassland ( " Flame Swordsman " : 1800 → 2340 ATK ) . " Flame Swordsman " attacked " Megasaurus " . Due to Fire monsters having an advantage over Dinosaur s ( " Megasaurus " : 2340 → 1800 ATK ) , " Megasaurus " was destroyed ( Ryuzaki : 2000 → 1460 Life Points ) . Jonouchi told Ryuzaki to say hello to his strongest monster , who was going to take out his lizards one at a time . Ryuzaki growled , commented that Dinosaurs are not lizards and got mad at Jonouchi for harming his Deck . Jonouchi ' s friends celebrated and thought he had a chance of winning . However Mai called it a lucky shot and claimed that Jonouchi did not stand a chance against her slave . Anzu reminded her that Jonouchi had beaten her a few hours ago , but Mai wrote it off as luck , and said that Jonouchi had cheated because he had gotten help from Yugi . 10th turn : Ryuzaki Ryuzaki worried a bit about the " Flame Swordsman " , but knew his " Red - Eyes Black Dragon " could defeat it and hoped to draw it . However he drew something else this turn and Summoned " Uraby " . 11th turn : Jonouchi Jonouchi got " Flame Swordsman " to attack " Two - Headed King Rex " ( " Two - Headed King Rex " : 2080 → 1600 ATK ) , destroying it ( Ryuzaki : 1460 → 720 Life Points ) . Mai got mad at Ryuzaki for letting Jonouchi do so well and told him that as her slave he should fight with the pride of serving Mai Kujaku . Annoyed by her arrogance , he looked forward to beating her after Jonouchi . Yugi started to worry that Jonouchi might be getting too confident and was certain that Ryuzaki would soon Summon a monster stronger than " Flame Swordsman " . 12 turn : Ryuzaki Ryuzaki failed to draw " Red - Eyes Black Dragon " again . Instead he Summoned " Crawling Dragon # 2 " in Defense Mode . 13th turn : Jonouchi " Flame Swordsman " attacked and destroyed " Crawling Dragon # 2 " . Jonouchi taunted Ryuzaki , asking if his cards were going extinct . 14 turn : Ryuzaki Ryuzaki finally drew " Red - Eyes Black Dragon " and Summoned it . Jonouchi was surprised by its power and Yugi recognized it as a legendary rare card that collectors pay hundreds of thousands of yen for . " Red - Eyes Black Dragon " attacked and destroyed " Flame Swordsman " ( Jonouchi : 665 → 65 Life Points ) . Jonouchi and his friends began to worry and Anzu asked Yugi if there was a way Jonouchi could still win . Yugi knew that the " Time Roulette " effect of " Time Wizard " could help Jonouchi win , but it only had a one - in - three chance of success . Honoring Jonouchi ' s wishes , he did not tell Jonouchi about this . 15th turn : Jonouchi Conscious that Jonouchi had " Time Wizard " , without knowing how to use it , Ryuzaki imposed a wager , wherein the winner would take both " Red - Eyes Black Dragon " and " Time Wizard " . He knew that " Time Wizard " had beaten Mai before and hoped to be able to use it against her later . Jonouchi had forgotten that he had Set " Time Wizard " until Ryuzaki mentioned that . Tempted by the monetary value of " Red - Eyes Black Dragon " , he accepted . Mai was unhappy with the bet , but Ryuzaki insisted that he was not her slave . Seeing such a fuss being made over " Time Wizard " , Jonouchi realized that it must be powerful and with no other options , he decided to play it , without knowing exactly how it worked . First he Summoned a monster in Defense Mode . He then flipped the " Time Wizard " , which spun its " Roulette of Time " . The roulette stopped pointing at a win symbol , causing Ryuzaki ' s monsters no age thousands of years , turning them into fossils ( Ryuzaki : 720 → 0 Life Points ) . Aftermath . Jonouchi ' s friends and Mai all cheered for Jonouchi . Anzu looked over at Mai , who embarrassingly let out an " oops " . Having lost , Ryuzaki handed " Red - Eyes Black Dragon " and 2 of his Star Chips to Jonouchi .