Ancient Gear " Ancient Gear " , known as " Antique Gear " ( アンティーク ・ ギア " Antīku Gia " ) in the " OCG " , is an archetype of Machine monsters used by Vellian Crowler in " Yu - Gi - Oh ! GX " , Rudolph Heitmann in " Yu - Gi - Oh ! 5D ' s " and Duel Academy students ' personnel , such as Yuri , Dennis McField , Jean - Michel Roget and the Obelisk Force members , in " Yu - Gi - Oh ! ARC - V " . All members of this archetype are EARTH monsters , except for the DARK " Chaos Ancient Gear Giant " . Design . The humanoid " Ancient Gears " bear a striking similarity to Ancient Greek soldiers , and so their creation may be linked to the Antikythera mechanism . True to their name , all " Ancient Gear " monsters resemble armored robots of varying designs with their bodies featuring unions of cogwheels and gears , joining several parts of their bodies together . The backgrounds of most of the Main Deck monsters features gears . Their name " Ancient Gear " is likely a reference to the old age of the mechanism that governs their functioning , which normally would require an external force to move them but interestingly enough they seem to be self - sufficient . This implies that contrary to their apparent antiquity , that they may be far more advanced than they look . When they are used as Fusion Material by Duel Academy members in " Yu - Gi - Oh ! ARC - V " , their Summon Chant mentions that they carry " ancient spirits " or other similar terms . This seems to imply that the " Ancient Gear " monsters may be old machines possessed by spirits , which could explain their functioning despite their old workings . This could also be the reason behind their glowing eyes . Playing style . " Ancient Gear " Decks focus on either Tribute Summon s or Fusion Summon s . The signature feature of the " Ancient Gear " monsters is to prevent the activation of Spell / Trap cards during their attack . This allows " Ancient Gear " monsters to attack without fear of being stopped by any Spell / Trap Cards . Due to the prevalence of monster effect s that can be activated during the Battle , newer monsters also prevent their activation . ( They aren ' t immune to Spell / Trap Cards , however . ) A number of cards allow " Ancient Gear " monsters to be Summoned from the Deck , such as " Spell Gear " , " Ancient Gear Catapult " , " Geartown " and " Machine Duplication " . Cards such as " Geartown " and " Ancient Gear Castle " allows ease of Tribute Summoning " Ancient Gear " monsters . " Catapult " is best used to destroy " Geartown " or " Ancient Gear Fortress " in order to fuel the swarm . Since " Catapult " ignores the Summoning conditions , it can also Special Summon " Ancient Gear Beast " or " Ancient Gear Golem ( - Ultimate Pound ) " . For their supports , " Geartown " and " Ancient Gear Castle " ease Tribute Summon , and the latter boosts the ATK . " Ancient Gear Fortress " and " Ancient Gear Hydra " provide a shield to " Ancient Gear " cards , and " Ancient Gear Reborn " can easily revive those monsters from the GY as well as strengthen them slightly . " Ancient Gear Wyvern " and " Ancient Gear Workshop " can allow for hand recovery . For Fusion Summon s , " Ancient Gear Hunting Hound " is simply " Polymerization " . The series starts off with " Ancient Gear Howitzer " , which can inflict damage and summon more " Ancient Gear " monsters while ignoring the Summoning conditions when destroyed by battle . " Megaton Ancient Gear Golem " can allow for multiple attacks ( should the right monsters be used as Fusion Material ) , and can then evolve into " Ultimate Ancient Gear Golem " for more damage , and finally , the only non - EARTH monster , " Chaos Ancient Gear Giant " , for total eradication . The deck further encourages the use of " Ancient Gear Golem " with their signature Fusion card " Ancient Gear Fusion " , which can almost instantly bring out any of the " Ancient Gear " Fusion Monsters if " Golem " is on the field . Other cards . This deck has synergy with " Gadget " archetype , as " Ancient Gear Gadjiltron Chimera " and " Ancient Gear Gadjiltron Dragon " can be used in combination with the " Gadget " monsters to unleash their effects . Both " Ancient Gear Reactor Dragon " and " Ancient Gear Hydra " also gain effects upon Tributing either " Ancient Gear " or " Gadget " monsters while still functional even just Special Summoned . The relationship is further strenghthened by " Ancient Gear Gadget " , a monster that is of both archetype at the time , with the monster itself can act in place of any " Gadget " monsters in the card pool . " Gold Gadget " and " Silver Gadget " can be used due to their ability to float and eventually Summon " Gadget " , which upon Tributing can provide " Reactor Dragon " and " Hydra " with their full effects . " Gold " and " Silver Gadget " can also be used in conjunction with " Ancient Gear Wyvern " in order to search a card and at the same time Xyz Summon " Gear Gigant X " for further searching . Other cards can work well with the Deck are Pendulum Cards , specially the " Metalfoes " archetype . This is mostly because the Pendulum monsters can be placed on a Pendulum Zone , making them valid targets for " Catapult " , also " Metalfoes " themselves can destroy " Geartown " or " Fortress " if needed , and can also destroy " Gold " and " Silver Gadget " with minimal drawbacks while at the same time fueling their main strategy . Moreover since they can enable Pendulum Summons they can greatly facilitate the Tribute Summon of " Reactor Dragon " or " Hydra " and if " Gold and Silver Gadget " are Special Summoned this way , they can be destroyed so the player can search both " Metalfoes " cards and " Ancient Gear Gadget " . However , the use of " Wyvern " prevents the use of " Metalfoes " cards . The New Master Rules , however , hardly affect the deck itself ( excluding non " Ancient Gear " teched in ) . As the player could focus on Tribute Summon " Golem " or " Reactor Dragon " , which is as strong as Extra Deck Monster . Also , the deck would only need one of their Fusion Monster at a time . Weaknesses . Cards like " Acid Rain " , " Magnetic Mosquito " , and " System Down " have the potential to shut down an " Ancient Gear " Deck completely . Although these cards can be hard to counter , " Imperial Iron Wall " , " Starlight Road " , " The Huge Revolution is Over " and other Spell / Trap negation cards can prevent them activating . Finally , being Machine Monsters , they can be used as Fusion Materials for an opponent ' s " Chimeratech Fortress Dragon " .