Yu - Gi - Oh ! - Episode 073 " Double Duel , Part 4 " , known as " Giant God Soldier of Obelisk " in the Japanese Version is the seventy - third episode of the " Yu - Gi - Oh ! " anime . It first aired in Japan on September 18 , 2001 , and in the United States on May 24 , 2003 . Featured Duel : Yami Yugi & Seto Kaiba VS . Lumis & Umbra , Part 4 . " Duel continued from previous episode . " Lumis has 4000 Life Points remaining and controls " Masked Beast Des Gardius " ( 3300 / 2500 ) in Attack Position , " Mask of the Accursed " ( equipped to " Beta The Magnet Warrior " ) , " Mask of Restrict " , and " Mask of Dispel " ( which is targeting Yugi ' s " Multiply " ) . Yami Yugi has 1500 Life Points remaining and controls " Beta The Magnet Warrior " ( 1700 / 1600 ) in Defense Position , " Alpha The Magnet Warrior " ( 1400 / 1700 ) in Attack Position , and " Multiply " . Umbra has 3700 Life Points remaining and controls " Masked Doll " . Kaiba has 2100 Life Points remaining and controls " Blue - Eyes White Dragon " ( 3000 / 2500 ) in Attack Position . Turn 17 : Lumis Lumis has just managed to summon " Masked Beast Des Gardius " . He is about to use " Des Gardius " to attack one of Yugi ' s " Magnet Warriors " , but Kaiba claims to Lumis that leaving his " Blue - Eyes White Dragon " on the field could be a mistake he may regret in making . " Masked Beast Des Gardius " attack s and destroy s " Blue - Eyes White Dragon " ( Seto Kaiba 2100 → 1800 ) . Turn 18 : Yami Yugi Yami Yugi draws . During Yami Yugi ' s Standby Phase , the effects of " Mask of the Accursed " and " Mask of Dispel " activate ( Yami Yugi 1500 → 1000 → 500 ) . Yami Yugi Normal Summon s " Gamma The Magnet Warrior " ( 1500 / 1800 ) in Attack Position . Yami Yugi then Tributes " Alpha The Magnet Warrior " , " Beta The Magnet Warrior " and " Gamma The Magnet Warrior " in order to Special Summon " Valkyrion the Magna Warrior " ( 3500 / 3850 ) in Attack Position . Yami Yugi then Set s a card . " Valkyrion the Magna Warrior " attack s and destroy s " Masked Beast Des Gardius " ( Lumis 4000 → 3800 ) . This activates the effect of " Des Gardius " , allowing Lumis to activate " The Mask of Remnants " from his Deck and equip it to " Valkyrion the Magna Warrior " . Due to the effect of " The Mask of Remnants " , Lumis takes control of " Valkyrion " . Turn 19 : Umbra Umbra draws " Masquerade " and subsequently activates it to take control of " Valkyrion the Magna Warrior " as it ' s wearing " The Mask of Remnants " . " Valkyrion the Magna Warrior " attacks Yami Yugi directly , but Yami Yugi activate s his face - down " De - Fusion " to return " Valkyrion the Magna Warrior " to his Deck and Special Summon " Alpha The Magnet Warrior " ( 1400 / 1700 ) , " Beta The Magnet Warrior " ( 1700 / 1600 ) , and " Gamma The Magnet Warrior " ( 1500 / 1800 ) from his Graveyard to Umbra ' s side of the field in Attack Position . Turn 20 : Kaiba Kaiba ' s hand contains " Soul Exchange " , " Obelisk the Tormentor " , " Polymerization " , and " Swordstalker " . Kaiba draws . He then activate s " Soul Exchange " to allow himself to Tribute his opponents ' monsters as if he was their controller . Kaiba then Tribute s " Alpha The Magnet Warrior " , " Beta The Magnet Warrior " , and " Gamma The Magnet Warrior " in order to Tribute Summon " Obelisk the Tormentor " ( 4000 / 4000 ) in Attack Position . " Obelisk the Tormentor " attack s Umbra directly ( Umbra 2000 → 0 ) . Turn 21 : Lumis Lumis , at this point , attempts to run away as he realizes he can ' t win , but he gets possessed by Marik . After a brief talk with Yami and Kaiba , Marik releases his control over Lumis , causing him to collapse . Because of this , he forfeits the Duel by default . Epilogue . Umbra falls , but seemed to save himself with a parachute , but Marik Ishtar takes his soul . He then takes Lumis ' soul due to him trying to run away ; causing him to forfeit . Both Kaiba and Yugi obtain two Locator Cards from him ( one for each of them ) . Featured cards . The following cards appeared in this episode . Cards in italics debuted here .