Yu - Gi - Oh ! Duelist - Duel 019 " I Won ' t Lose ! " is the nineteenth chapter of " Yu - Gi - Oh ! Duelist " in the English version and the seventy - eighth chapter of " Yu - Gi - Oh ! " in the Japanese version . It was first printed in Japanese in the " Weekly Shōnen Jump " magazine . It was reprinted in volume 2 of " Yu - Gi - Oh ! Duelist " and volume 6 of the bunkoban . Summary . " Two - Headed King Rex " has just stomped on Jonouchi ' s " Baby Dragon " destroy ing it . Mai laughs and asks if he was going to try the same combo he tried against her and invites him to try aging " Baby Dragon " after he scrapes it off of the foot of " King Rex " . Jonouchi worries , now that his plan has been ruined , but Anzu and Honda say that he can still win . Ryuzaki tells Jonouchi to hurry up and play his next card . Jonouchi worries that " Two - HeSword Arm of Dragon | ader King Rex " is strong . However he has a stronger card in his hand . He Summons " Battle Steer " , which has 1800 ATK and gets it to attack " Two - Header King Rex " , which Jonouchi believes to have 1600 ATK . However , " Two - Headed King Rex " was powered - up by the Wasteland making its ATK 2080 . " King Rex " also destroys " Battle Steer " with his " Dinosaur Foot Stomp " attack , dropping Jonouchi ' s Life Points to 1720 . Since Jonouchi ' s field is Grassland , it should power up Warrior s , so Jonouchi Summons " Axe Raider " . Its ATK rises from 1700 to 2210 , enough to beat " King Rex " . Jonouchi ends his turn . However Ryuzaki Summons " Sword Dragon " , whose ATK goes from 1750 to 2275 , due to its Field Power Source . It slices " Axe Raider " in two with its " Dino Tail Sword " attack , dropping Jonouchi ' s Life Points to 1145 . Ryuzaki laughs , telling Jonouchi to give it up and comments that he will have to take earth back to the ice ages before he can beat his Dinosaur cards . Jonouchi starts to think that he is not good enough to beat Ryuzaki . He looks at Yugi , thinking that he needs his help . However he slaps himself in the face and reminds himself that he cannot ask Yugi for help all the time . He promises himself that he will win on his own and begins his turn . The cards in Jonouchi ' s hand are " Time Wizard " , " Swamp Battleguard " , " Rock Ogre Grotto # 1 " and an unnamed . He thinks that none of these are good enough to beat Ryuzaki ' s Dinosaurs . He knows that " Time Wizard " has the power to control time , taking it backwards or forwards , but he does not any way of using it , except for the combo he used it in against Mai . He wonders if it has some other hidden power and plays it face - down on the board , hoping it might come in useful later . Mai concludes that the card Jonouchi set must have been " Time Wizard " and suspects that he does not even know how to use it . She informs Ryuzaki what card Jonouchi played , but Ryuzaki has already figured it out and also suspects that Jonouchi doesn ' t know how to use it . Yugi starts to think about the " Time Wizard " and Mai admits to herself that it is a powerful card that even she lost to when she let her guard down . Jonouchi plays " Rock Ogre Grotto # 1 " in Defense Mode . Ryuzaki Summons " Megasaurus " and uses it to destroy " rock Ogre Grotto # 1 " with its " Charge " attack . Something causes Jonouchi to lose 5 Life Points , dropping him to 1140 . Jonouchi Summons " Swamp Battleguard " in Attack Mode , but it is destroyed by " Sword Dragon " , lowering his Life Points to 665 . Ryuzaki laughs and ask Jonouchi if he gives up yet . Bakura thinks that with the Field Power on their side , Ryuzaki ' s Dinosaurs are just too tough for Jonouchi to fight and Anzu asks Yugi if there is a way for Jonouchi to win . Yugi considers " Time Wizard " , but notes that it is risky and wonders if Jonouchi can figure it out . Bakura , Anzu and Honda plead with him to tell Jonouchi how to win , but Yugi wants to respect Jonouchi ' s wish to not receive any help . They remind him that if Jonouchi loses , he will not be able to save Shizuka and add that that is more important than protecting Jonouchi ' s honor right now . Yugi gives in and decides to tell Jonouchi . However , Dark Yugi interrupts him . He explains that if they rescue Jonouchi this time , he will truly lose to himself . With some persuasion , Yugi agrees . Dark Yugi then directs his attention to Jonouchi ' s eyes and comments that they are not the eyes of someone who has given up . Jonouchi begins his turn and Summons " Flame Swordsman " , whose ATK rises to 2340 in the Grassland . Ryuzaki and Mai are somewhat impressed that he played a decent card . " Flame Swordsman " and " Megasaurus " then battle with the same ATK . Mai suspects " Flame Swordsman " will be destroyed after being charged at by a thousand pound dinosaur . However " Flame Swordsman " uses its " " Tôki Enzan Ken " " attack , slicing " Megasaurus " in two and reducing Ryuzaki ' s Life Points to 1460 . Mai realizes that Dinosaurs are weak against Fire , but credits Jonouchi ' s move to beginner ' s luck . Jonouchi ' s friends congratulate him and Jonouchi thinks that he will win on his own . Featured Duels . Katsuya Jonouchi vs . Dinosaur Ryuzaki . " . . . Continued from the previous chapter . " " Continued next chapter . . . " Featured cards . The following cards were used in this chapter . Cards in italics debuted here . Anime adaption . The middle of the eleventh episode of the " Yu - Gi - Oh ! " anime is based on this chapter . A number of changes were made including :