Engine An engine is a combination of cards that work well together , but contains too few cards to make a full Deck . If an engine focuses on raising consistency and draw power , it is called a Draw Engine . Examples . Rank 3 engine . These engines use the effect of a specific monster to quickly Xyz Summon Rank 3 monsters such as " Leviair the Sea Dragon " , " Wind - Up Zenmaines " , " Dante , Traveler of the Burning Abyss " , " M - X - Saber Invoker " , and " Totem Bird " ( if using WIND monsters . There are three notable variants . " Tour Guide From the Underworld " is used to Summon Level 3 Fiend - Type monster from the Deck . This engine was largely replaced by " Speedroid Terrortop " and " Speedroid Taketomborg " , which could achieve the same purpose without wasting a Normal Summon . After " Terrortop ' s " Limiting , the " Predaplant Ophrys Scorpio " and " Predaplant Darlingtonia Cobra " engine became more prominent ; while it uses up the Normal Summon , once per Duel it can also search out a " Fusion " or " Polymerization " Spell Card . Plant engine . It consists of " Glow - Up Bulb " , " Spore " , " Lonefire Blossom " , " Dandylion " , " Debris Dragon " and " One for One " and allows for fast Synchro Summoning . Diva engine . The Diva Engine is similar to the Tour Guide engine . " Deep Sea Diva " is used to Special Summon another Sea Serpent monster , setting up a Synchro or Xyz Summon . It is more commonly used in " Mermail " Decks , where is possible to search an " Atlantean " monster , specially " Neptabyss , the Atlantean Prince " , and provide access to other combos . " Machina " engine . The " Machina " engine consists of " Machina Fortress " and " Machina Gearframe " . It gives more power to Machine Decks , Including " Gimmick Puppets " , " Gadgets " , " Geargia " and " Karakuri " . " Gear Gigant X " and " Machina Peacekeeper " can be used to search " Gearframe " , but the latter is rather not used due to its slow speed . " Dragon Ruler " engine . When the infamous " Dragon Ruler s " were Limited , they were commonly used as engines on Decks of their corresponding Attributes . For example , " Redox , Dragon Ruler of Boulders " could be used to revive " Scrap " or " Karakuri " monsters ; " Tidal , Dragon Ruler of Waterfalls " could trigger the effect of " Atlantean " monsters while setting up the Graveyard , and " Tempest , Dragon Ruler of Storms " could fit in any Dragon - oriented Deck , mainly " Dragunity " . " Fairy Tail - Snow " engine . In Decks that rely on filling the Graveyard , specially " Lightsworn " builds , it has been common to use copies of " Fairy Tail - Snow " , that can be used as free Xyz / Synchro materials , while banishing useless cards from the Graveyard or cards that trigger their effects upon being banished . Also , since it can be Special Summoned during the opponent ' s turn , it can also be used as a way to frustrate an opponent ' s move , acting like a " Book of Moon " . " Brilliant Fusion " engine . This engine consists in Fusion Summoning " Gem - Knight Seraphinite " with " Brilliant Fusion " , thinning the Deck with the Fusion Materials while also allowing 1 extra Normal Summon . Depending on the game state , it can provide materials for Link , Synchro , Fusion and / or Xyz Summons . The most popular and consistent way to accomplish this combo is by Normal Summoning " Predaplant Ophrys Scorpio " , whose effect is used to Special Summon " Predaplant Darlingtonia Cobra " . Then , the effect of " Darlingtonia Cobra " is used to search " Brilliant Fusion " , which is finally used to Fusion Summon " Seraphinite " . " Performage Trick Clown " is the most common LIGHT Fusion Material used for this Summon , since its effect can be triggered , Special Summoning itself from the Graveyard . This combo results in - 4 cards in the Deck , 4 monsters on the field and an additional Normal Summon . The monsters can be used for a variety of Summons , especially of monsters like " Saryuja Skull Dread " , " Firewall Dragon " , etc . Also , if there was already a Link monster pointing to a Main Monster Zone ( s ) when " Seraphinite " was Summoned , it is possible to Xyz Summon a Rank 3 monster with the " Predaplant " monsters .