Yu - Gi - Oh ! ARC - V - Episode 128 " What Lurks Beneath " , known as " Decisive Battle ! Spirit Tech Force " in the Japanese version , is the one hundred and twenty - eighth episode of the " Yu - Gi - Oh ! ARC - V " anime . It aired in Japan on October 23 , 2016 and in Canada on February 2 , 2018 . It became available with official subtitles via Crunchyroll on November 28 , 2017 . Featured Duel : Yuya Sakaki and Declan Akaba vs . Leo Akaba . At the start of the Duel , the Field Spell Card " Crossover " is activate d , as per the rules of an Action Duel . It will allow the players to use Action Card s , but they may only have one in their hand at a time . Turn 1 : Yuya Yuya activate s " Stargazer Magician " ( 1 ) and " Timegazer Magician " ( 8 ) in his Pendulum Zone s . Yuya Pendulum Summon s " Odd - Eyes Pendulum Dragon " ( 2500 / 2000 ) from his hand in Attack Position . Turn 2 : Declan Declan activates " D / D Savant Copernicus " ( 1 ) and " D / D Cerberus " ( 6 ) in his Pendulum Zones . Declan Pendulum Summons " D / D Berformet " ( 1400 / 1800 ) and " D / D Ghost " ( 600 / 200 ) from his hand in Attack Position . Declan Normal Summon s " D / D Necro Slime " ( 300 / 300 ) . He then tune s the Level 4 " Berfomet " and the Level 1 " Necro Slime " with the Level 2 Tuner monster " Ghost " to Synchro Summon " D / D / D Gust King Alexander " ( 2500 / 2000 ) in Attack Position . As " Ghost " was sent to the Graveyard , its effect lets Declan target another " D / D " monster in his Graveyard and send a monster with the same name from his Deck to the Graveyard . He chooses " Berfomet " . Declan activates the effect of the " Necro Slime " in his Graveyard , letting him Fusion Summon using it and other monsters in his Graveyard by banish ing them . He fuses " Ghost " with " Necro Slime " to Fusion Summon " D / D / D Flame King Genghis " ( 2000 / 1500 ) in Attack Position . As a " D / D " monster was Normal or Special Summoned , the effect of " Alexander " activates , letting Declan Special Summon a Level 4 or lower " D / D " monster from his Graveyard . He Special Summons " Berfomet " ( 1400 / 1800 ) in Attack Position . As a " D / D " monster was Special Summoned , the effect of " Genghis " activates , letting Declan Special Summon a " D / D " monster from his Graveyard . He Special Summons the second " Berfomet " ( 1400 / 1800 ) in Attack Position . Declan overlays his two Level 4 monsters to Xyz Summon " D / D / D Wave King Caesar " ( 2400 / 1200 ) in Attack Position . Declan activates the Continuous Spell Card , " Dark Contract with Exclusivity " , which will prevent him from Special Summoning monsters from the Extra Deck , but will also prevent his opponent from doing so as long as he control s monsters of the same card type . Turn 3 : Leo Leo activates two copies of " Spirit Reactor " ( 1 ) in his Pendulum Zones . He then activates the Pendulum Effect of his left " Reactor " , letting him change its Pendulum Scale to that of another Pendulum Monster on the field . He targets " Timegazer " ( " Reactor " : 1 → 8 ) . Leo Pendulum Summons " Spirit Tech Force - Pendulum Governor " ( 2800 / 2500 ) and " Spirit Gem - Salamander Core " ( 0 / 0 ) from his hand in Attack Position . Leo activates the effect of " Pendulum Governor " , letting him Tribute a " Spirit Gem " monster that was Pendulum Summoned from the hand this turn that has not activated its effect to allow " Pendulum Governor " to use that card ' s effect up to twice this turn . He Tributes " Salamander Core " . He activates the effect now , letting him destroy a monster on the field and inflict damage 800 to its controller . He destroys " Odd - Eyes " ( Yuya : 4000 → 3200 ) and " Genghis " ( Declan : 4000 → 3200 ) . The effect of " Pendulum Governor " prevents any monsters besides Pendulum Monsters from targeting it for attacks . As Leo has cards in both of his Pendulum Zones , its effect also prevents monsters his opponent controls with Levels between those Pendulum Scales " from attacking " Pendulum Governor " . Leo Set s a card . Turn 4 : Yuya Yuya Pendulum Summons " Odd - Eyes " ( 2500 / 2000 ) from his Extra Deck and " Performapal U Go Golem " ( 1600 / 1000 ) from his hand , both in Attack Position . As it was Pendulum Summoned this turn , Yuya activates the effect of " U Go Golem " , letting him Fusion Summon a Fusion Monster from his Extra Deck to using monsters he controls as the Fusion Materials , including " U Go Golem " . He fuses " Odd - Eyes " with " U Go Golem " to Fusion Summon " Performapal Gatlinghoul " ( 2900 / 900 ) in Attack Position . As it was Fusion Summoned , its effect activates , inflicting 200 damage to Leo for each card on the field ( Leo : 4000 → 1600 ) . As " Gatlinghoul " was Fusion Summoned this turn using a Pendulum Monster as a Material , Yuya activates its other effect , letting him destroy a monster his opponent controls and inflict damage to his opponent equal to that monster ' s ATK . He targets " Pendulum Governor " . Featured cards . The following cards appeared in this episode . Cards in italics debuted here .