Chemical Chemical is a small series of cards named after and formed from things like elements and minerals , like hydrogen . The trump card of the series is " Water Dragon " . They were used by Bastion Misawa in the " Yu - Gi - Oh ! GX " anime , though one member of this series , " Hyozanryu " , was first used by Seto Kaiba in the second series anime . All monsters of this series are Effect Monster s , except for the Normal Monster " Hyozanryu " . Utilizing Water Dragon . While Water Dragon has potential in a lot of decks , it should be used to full effect for its ATK reducing ability . Note that , due to its habit of affecting your own monsters as well , cards such as DNA Surgery and DNA Transplant should be avoided , otherwise it would render the entire deck pointless ( Water Dragon would reduce your own monsters ' ATK to 0 as well , making monsters on both sides of the field unable to destroy anything by battle , which has some use however as Stall ) . While Water Dragon itself has quite an impressive array of statistics and effects , the same cannot be said about its two / three " components " . While Hydrogeddon can search out copies of itself by destroying opposing monsters , there is a limit to how many it can search out ( namely , you can only include a maximum of 3 ) . Therefore , it might be wise to include Pot of Avarice to help replenish them after the first or second Summoning of Water Dragon . Aqua Chorus and Symbol of Heritage can immensely help , as you will likely try to swarm the field with these cards , and Symbol of Heritage can also serve to Special Summon them should Pot of Avarice not be an option to you . Miracle Jurassic Egg and Babycerasaurus can also assist in searching out Hydrogeddon and Oxygeddon , as they ' re both Dinosaur - type monsters . Water Dragon ' s second effect allows it to Summon back the monsters used for its Summon . Thus , you only need to return Bonding - H2O to your hand to re - Summon it . In addition , Water Dragon can be Special Summoned from your graveyard as well . Therefore , Spell Reclamation will be a worthy card , to prolong the life of your Water Dragon . A few protection cards are also suggested , such as Waboku and Negate Attack , to ensure your monsters survive the remainder of your opponent ' s turn . Also , this can be very useful for many duelists , especially since only one Water Dragon is needed in a deck , freeing up space for other cards ( which can also be filled with deck - thinners to speed up the process as well ) . Because Water Dragon ' s effect can only affect monsters face - up , it will be wise to include Light of Intervention . This card serves two purposes : to allow Water Dragon ' s effect to go through , and to eliminate any nasty surprises your opponent will inevitably plan . However , this can be a double - edged sword , as some decks rely on face - up , defense - position monsters . Despite that , Light of Intervention is needed if you wish to use Scroll of Bewitchment , which can immensely help , as it can change the Attribute of any monster you equip to . It should go without saying that this can help you to get rid of a particularly powerful opponent when you declare " FIRE " . As it only affects the target monster , it wont cause Water Dragon ' s effect to go out of control . Fairy of the Spring can also help return a few Scrolls of Bewitchment ( Since you will only use one per turn and it will be destroyed before the battle phase ends , so the drawback of Fairy of the Springs is non - existent ) . Because of Water Dragon ' s considerably high ATK , you should focus on attacking monsters whose ATK is reduced to 0 by its effects , as it would effectively allow Water Dragon to attack directly . With its impressive 2800 ATK , this should allow you to win after about 3 attacks . Cards that can help this out are the three aforementioned cards ( you can include up to 3 scrolls and 3 Fairies of the Spring , giving you a total of 6 chances at a FIRE monster . ) , Volcanic Queen and Lava Golem , and Final Attack Orders to ensure your opponent ' s monsters stay in ATK mode . Lava Golem can be especially devastating in this respect , as you can simply leave it on the field to torment your opponent . Mask of Restrict can also come in handy , as you have no tribute monsters in your deck , forcing your opponent to attack your monsters if they wish to get rid of Lava Golem . In Addition , Lava Golem and Volcanic Queen can help rid the field of annoying / powerful opposing monsters , as they use the opponent ' s monsters as tribute . Lava Golem , in particular , is extremely useful as it can control your opponent ' s monsters if they swarm the field and can be used in the aforementioned way to torture your opponent . Volcanic Queen , on the other hand , can be used to quickly get rid of singular threats , such as Yubel . However , it runs the risk of your opponent turning its effect on you , by sacrificing a card to do damage to your lifepoints , so it ' s best to destroy it with Water Dragon as soon as possible . Because this deck focuses on destroying opposing FIRE monsters , Royal Decree should be included to prevent your opponent from springing the ever - popular Sakuretsu Armor on your dragon . You can try having Des Counterblow on the field and attacking your opponent directly with Water Dragon to Summon 2 Hydrogeddon and 1 Oxygeddon and attack directly with those for a total of 7800 damage . Usually , by the time you get a field like that , your opponent should have lost at least 200 LP already The Main point of this deck is to inflict massive damage with Water Dragon through attacking FIRE or Pyro - type monsters . However , due to Water Dragon having 2800 ATK , most equip cards are somewhat useless , as are field cards . This is mainly due to the fact that you still need 3 attacks to claim a victory and , unless you can boost Water Dragon ' s ATK beyond 4000 , it will always take 3 hits . Megamorph is not recommended , as it will halve Water Dragon ' s ATK after the first attack . Twin Swords of Flashing Light - Tryce , on the other hand , can help . If you can get 2 FIRE monsters , or a single FIRE monster and no other monsters on your opponent ' s field , Twin Swords of Flashing Light can greatly cut your efforts ( While it lowers Water Dragon ' s ATK to 2300 , it will allow it to attack twice , bringing the grand total up to 4600 damage per turn . ) Another good strategy would be to use Destiny HERO - Diamond Dude ' s effect to throw out Bonding H2O and Summon Water Dragon with out having to send Hydrogeddon and Oxygeddon from the field . Advantages . Due to the Special Summoning nature of this deck , you can include Mask of Restrict to considerably hamper the efforts of your opponent , as many decks rely on Tribute Summoning their top cards ( this is especially true for Monarch Decks , which will be rendered useless due to this ) . As well , because of the focus on attacking FIRE monsters ( whose ATKs will be reduced to 0 ) , this deck can completely bypass stalling monsters , such as Marshmallon , and allow Water Dragon to make a pseudo - direct attack . Note that while Water Dragon ' s effect would theoretically make it devastating against Volcanic Decks , keep in mind that Volcanic Decks are aimed at monster destruction , so Water Dragon ' s flexible revival might not be able to keep up . However , given you only need about 3 attacks with Water Dragon to win the duel , it is debatable which is better . However , you can tip the scales in your favor by including a few Dust Tornado es , as Blaze Accelerator is a continuous spell card and , therefore , requires being on the field after activation to be used . You can also use one of the Lightsworn s to try and get Water Dragon in the Graveyard , assuming you have everything you need in your hand . Disadvantages . The main difficulty of this deck is getting Hydrogeddon and Oxygeddon onto the field . You also need to have Bonding H2O in your hand . This can be avoided by using Destiny Hero - Diamond Dude ' s effect and cards that place it at the top of the deck . While high - drawing cards can help , as well as Double Summon , it can be annoying since your opponent will more than likely be tempted to use Lightning Vortex against your monsters . Also , getting the specific cards into your hand and on the field will be difficult and , considering Water Dragon itself is a dead draw , you should include a few Magical Mallet s to put back the cards you don ' t need and try to get the ones you do . Another drawback is the limitations of Water Dragon ' s effect to Special Summon its components . While it will activate should Water Dragon be destroyed by any means , it will not if Water Dragon is returned to your hand ( which will effectively set you back to square one ) . Hence Light of Intervention and Solemn Judgment might help . In the same vein , this deck is also weak against Macro Cosmos Decks , as they can simply remove Hydrogeddon and Oxygeddon from play , crippling this deck ' s usefulness .