Yu - Gi - Oh ! GX - Episode 138 " The Darkness Revealed " , known as " Supreme King Descends - The Duelists of Death " in the Japanese version , is the one hundred and thirty - eighth episode of the " Yu - Gi - Oh ! GX " anime . It first aired in Japan on May 30 , 2007 and in the US on February 8 , 2008 . Summary . Axel Brodie and Jim Crocodile Cook , dressed in cloaks , enter a cave and find an elderly man and his young grandson , Nero . Jim shows them a picture of Jaden Yuki and asks if they have seen him . They say they haven ' t , and ask if he ' s a Duelist . When Jim responds that he is , the old man suggests that he ' s already dead , as anyone with a Duel Disk in this area has been killed by The Supreme King ' s Army . Two Duel Spirits of " Battle Footballer " enter the cave and state that if any hidden Duelists don ' t reveal themselves , they will take away everyone present . Jim and Axel step in to Duel them . Outside a tall spire made of rock , an army forms and chants " Supreme King " in unison over and over again ( in the dub , the army chants " He is the power " over and over again ) , appearing to nearly worship their master . In the top room of the spire , five Duel Spirits report to their King . Chaos Sorcerer states that they ' ve taken over the Eastern sector and Guardian Baou reveals that the North sector has also fallen . Skull Knight claims that the West will soon fall , while Skilled Dark Magician and Skilled White Magician say that only the Southern quadrant remains free . Jim and Axel easily defeat the Battle Footballers , though the Duel isn ' t actually shown . The old man explains that the Supreme King appeared in this world suddenly , and is attempting to rule over it as a tyrant , having Duelists arrested and brought to his keep , from which no one returns alive . Axel and Jim question whether Jaden could have been captured by the King , since his current mental state could very well affect his Dueling skills . It ' s revealed that after Jim and Axel left Jaden in the previous episode , Jim returned and attempted to convince Jaden that the deaths of his friends was not his fault . He states Jaden would not respond and it was as if " his soul left him " . The comet appears in the sky once more , which had previously affected Jim in a negative way . A flashback now ensues , and shows a much younger Jim walking through a forest . He finds numerous s simply lying around and Shirley nearly walks right into one . To prevent her from doing so , Jim tackles her , and they end up plunging off a cliff over a waterfall . In the present , Jim states he wants to save Jaden no matter what , and the next scene shows he , Axel , the old man , and his grandson aboard an unnamed fossil car , heading towards the old man ' s village . At the village , foot soldiers of the Supreme King are attacking it , the Duel Spirits of " Abaki " , " Blast Asmodian " and " Mechanicalchaser " . The Duel Spirit of " Total Defense Shogun " , appears and attempts to destroy them . Jim and the others arrive and Jim jumps off to help , and is nearly killed by the Total Defense Shogun , who calls himself Burgundy . The old man intervenes , stating that Jim and Axel are new allies . However , Burgundy reacts too quickly and ends up hitting Jim anyway , though the blow only appears to knock him out . Jim remembers when he first arrived at Duel Academy and found Jaden , Syrus Truesdale and Tyranno Hassleberry attempting to feed Shirley . Jim states she won ' t accept food from anyone but him , but Jaden proves him wrong , successfully feeding her without getting his arm ripped off . Jim awakens in a hut , and is greeted by the Duel Spirit of " Spirit of the Harp " , who calls herself Claret . Burgundy enters and apologizes to Jim , stating he thought he was with The Supreme King . Burgundy states that no one ever returns from the Supreme King ' s keep alive , and suggests they stay here in the village , as for now it ' s safe , and they would be valuable allies to help defend it if it ' s attacked . They opt to leave , intent on reaching the Supreme King ' s keep and rescuing Jaden . Upon arriving , they find it deserted , and see numerous Duel Disks burning in pits of lava . The only remaining resident of the castle is Kozaky , who reveals himself as a researcher of the Supreme King ' s army . He states that all the captured Duelists are dead , sacrificed to enable the completion of " The Ultimate Card " . Kozaky also reveals that The Supreme King and the rest of the army have left this castle and proceeded south to launch an all - out attack on the last free area of the dimension . Kozaky doesn ' t allow them to leave , and though Jim believes it be a waste of time , he Duels Kozaky . Though Kozaky summons three monsters and nearly wipes out Jim ' s Life Points on his first turn , Jim still easily wins on his second turn by Summoning " Fossil Machine Skull Convoy " . They leave , and see Burgundy ' s village burning , the attack having already come to fruition . They see Nero ' s Duel Disk on the ground , cracked , and Burgundy limp out of the village , urging them to flee , as they are no match for the Supreme King . Burgundy then fades away . Jim runs after the army and challenges The Supreme King to a Duel . He accepts , and takes off this helmet ' s visor - revealing that The Supreme King is none other than Jaden himself . Featured Duel : Jim Crocodile Cook vs . Kozaky . Turn 1 : Jim Jim draws " Weathering Soldier " and subsequently Normal Summons it ( 2000 / 1200 ) in Defense Position . Turn 2 : Kozaky Kozaky draws " Chaosrider Gustaph " and subsequently Normal Summons it ( 1400 / 1500 ) in Attack Position . Kozaky then activates " Double Summon " to Normal Summon twice this turn . He then Normal Summons another " Chaosrider Gustaph " ( 1400 / 1500 ) in Attack Position . Kozaky then activates " Revival of Dokurorider " to Tribute " Gadget Soldier " from his hand and Ritual Summon " Dokurorider " ( 1900 / 1850 ) in Attack Position . He then activates the effect of one " Chaosrider Gustaph " to remove from play " Double Summon " and " Revival of Dokurorider " from his Graveyard and increase the ATK of that " Chaosrider Gustaph " by 600 until the end of Jim ' s next turn ( " Chaosrider Gustaph " : 1400 → 2000 / 1500 ) . The weaker " Chaosrider Gustaph " attacks and destroys " Weathering Soldier " . The stronger " Chaosrider Gustaph " and " Dokurorider " attack directly ( Jim 4000 → 2100 → 100 ) . Turn 3 : Jim Jim draws . He then activates " Fossil Fusion " to remove from play " Weathering Soldier " and " Gadget Soldier " from both players ' Graveyards in order to Fusion Summon " Fossil Machine Skull Wagon " ( 1700 / 1500 ) in Attack Position . Jim then activates " Time Stream " to pay half his Life Points ( Jim 100 → 50 ) and Tribute " Fossil Machine Skull Wagon " in order to Special Summon " Fossil Machine Skull Convoy " ( 2100 / 1800 ) in Attack Position . Due to the first effect of " Skull Convoy " , it can attack up to three times during each Battle Phase while Kozaky controls at least one monster . " Fossil Machine Skull Convoy " attacks and destroys the two " Chaosrider Gustaph " and " Dokurorider " ( Kozaky 4000 → 3900 → 3200 → 3000 ) . Since " Fossil Machine Skull Convoy " destroyed a monster by battle and sent to the Graveyard , its second effect activates , inflicting 1000 damage to Kozaky for each monster destroyed this way . Three were destroyed this way ( Kozaky 3000 → 0 ) . Featured cards . The following cards appeared in this episode . Cards in italics debuted here .