Greiger Greiger , known as Bommer in the Japanese version , was initially one of Goodwin ' s 5 Dueling Assassins that was placed in the Fortune Cup with the intent of exposing the Signer s , as well as a member of Iliaster . Later , he became a member of the Dark Signers , bearing the dark mark of the killer whale and having his " Earthbound Immortal Chacu Challhua " ( however , in Z - one ' s time - line he was not a Dark Signer ) . An honorable Duelist , Greiger was prideful , yet stoic . Likely of South American origin , he came from a destitute village and Dueled to provide financial aid to it . Once he was transformed into one of the Dark Signers , Greiger obtained the Killer Whale Dark Mark when Roman killed him by hanging him over the Negative Ener - D . He was then brought back to life after Goodwin ' s defeat . However , after he became one of the Dark Signers , Greiger came to learn the truth . The Dark Signers were responsible for the destruction of his village . When his " Earthbound Immortal Chacu Challhua " was Summoned , it held the souls of his siblings and other children from his village . Biography . History . Greiger grew up in a poor village near the Nazca Lines . It was thought that Iliaster had used Greiger ' s village as the site of an " experiment " to summon the Crimson Dragon , which completely destroyed the village and killed his entire family . With such information that Iliaster didn ' t want anyone to know , Greiger then became involved in some sort of compromise with Rex Goodwin , and agreed that KaibaCorp would provide aid for the reconstruction of the village in exchange for exposing the Signers during the Fortune Cup . Fortune Cup . His first match was against Luna , but as her brother was substituting for her , he ended up Dueling a disguised Leo instead . Though Leo put up a valiant fight , Greiger won easily , and was never even intimidated . During the break between his match and the next match between Akiza Izinski and Gill Randsborg , Greiger was stopped in the hall by Lazar , and after he said that Greiger did well in his Duel , Greiger pointed out that no matter how they looked at it , the person he just fought was clearly a boy , to which Lazar showed him a paper which showed that Leo and Luna were in fact twins . As Akiza faced off against Gill Randsborg and was left with only 50 Life Points , Greiger thought that the match would be over , but Yusei thought otherwise . When it was the real Luna ' s turn to Duel , Greiger told Yusei that the imposter had showed him some fine Dueling and then wondered how the genuine article would fare . Greiger ' s opponent in the semifinals was Yusei . It was revealed during the match , that Grieger had learned of his sibling ' s deaths ( In the dub , death was still strongly implied during the match ) . Greiger gained an advantage over Yusei by summoning his trump card , " Flying Fortress SKY FIRE " , within the second turn of the Duel . Yusei was able to destroy it , but not before being left with only 300 Life Points after taking massive damage from both its massive attack power and destructive burn effect . Despite losing his key card , Greiger , however kept Yusei at bay with his " Chariot Pile " trap until he Summoned " Dark Strike Fighter " , but Yusei was able to defeat Greiger before he could use its burn effect to end the match . Having lost the match and enraged at no longer being able to help his younger brother and sister , Greiger not only revealed the truth about his village to the audience , he then decided to take revenge on Goodwin for his village ' s destruction . Greiger used his Duel Runner to rocket towards the box room , and intended to kill Goodwin . Yusei attempted to stop him , but one of the spikes on Greiger ' s Duel Runner broke and flew off and crashed into Goodwin ' s control room . Goodwin caught it with his prosthetic hand . When both riders crash landed , an enraged Greiger grabbed Yusei and asked him why he stopped him . Yusei told him that if he went through with it , then he would have been no better than Goodwin . Greiger was arrested by Sector Security after his assault on Goodwin . He left a message to Yusei and told him to carry out his own mission . Dark Signers . Greiger was being transported in a Security vehicle at the time the abilities of the Dark Signers Misty Tredwell and Carly Carmine awoke . The city was shaken as the Lizard and Hummingbird Nazca lines appeared in New Domino City . The vehicle transporting Greiger was within the borders of the flaming lines . When Misty Summoned " Earthbound Immortal Ccarayhua " the guards transporting Greiger as well as everyone else within the Nazca border were absorbed by it to fulfill its summoning requirements . Greiger was then freed from their custody by Devack , who seemed to know him somehow . Devack invited Greiger by saying that if the flames of vengeance still burned within him to join them . After Devack ' s defeat and the destruction of " Cusillu " , Roman Goodwin proved to have a contingency plan . After he brought Greiger to the doors of the Underworld , Roman said that he was going to gain newfound power as a Dark Signer . Greiger agreed to stop Yusei in order to get vengeance on Goodwin . Greiger was then transformed into a Dark Signer after Roman killed him by hanging him ( In the dub , he was dropped into the Netherworld via a trapdoor , and the thread hanging was removed ) and obtained an Earthbound Immortal ; known as " Chacu Challhua " . Greiger attempted to catch up with Yusei only to be cut off by Crow Hogan who challenged him to a Shadow Turbo Duel . During the Duel , it was revealed like Crow , he too had looked after a group of orphaned children along with his younger siblings , Annie and Max . It was also revealed that it was the Earthbound Immortals , mainly Greiger ' s , that had caused their disappearance as evident by their souls trapped within " Chacu Challhua " . Upon this revelation , Greiger attempted to back down , however at that time , the Earthbound God telepathically requested him to not only to continue , but to also to kill every Signer . As Greiger refused , in the end , he was taken over and attacked Crow unwillingly . The Duel ended with Crow as the victor , and the souls of everyone the Immortal had absorbed were released , including everyone from Greiger ' s village . Greiger , having to pay the price as a Dark Signer , crumbled to dust , but not before apologizing to both Crow and Yusei . He died happy knowing what finally happened to his village and that they were all free . A shooting star was seen over his village later . His brother and sister wondered if Greiger was also watching it . When Rex was defeated in the final battle , and the King of the Netherworld was destroyed , Greiger was restored to life , along with the other Dark Signers except for Roman and Goodwin himself . World Racing Grand Prix . Greiger returned home to his family and decided to travel to Nazca where they enshrined the Nazca Gods . After the Diablo attack on New Domino City , and Yusei obtained his Accel Synchro Monster , Greiger had a dream . The dream was about Jack Atlas being destroyed by his own Signer Dragon , " Red Dragon Archfiend " . He then sent a letter to Jack and stating that " Jack Atlas would destroy himself with his own power if he didn ' t find a new way of fighting . " Jack and Yusei end up going to Nazca to see what exactly was meant by the letter . Later the same day , Greiger had Jack Duel his younger sibling Max to see Jack ' s power . After Max ' s Duel , Jack left Greiger and Yusei on his Duel Runner . Eventually , Greiger figured out that his dream was just a set up in order to get Jack to come to Nazca due to the will of the Crimson Devil . Having learned that Jack had made his way into the shrine , Greiger and Yusei , along with Max , witnessed Jack make a contract to a spirit that served the Crimson Devil , The Familiar of Red Nova . The deal was that if Jack won , he would be granted power . However , if Jack lost , then the Crimson Devil would take his body and use it for his own agenda . Greiger also revealed the battle between the Crimson Devil and Crimson Dragon , and how the Crimson Dragon fought it to exhaustion ( Greiger stated that even the Dark Signers could not control the Crimson Devil ) . He explained how the " Legendary Signer " defeated the Crimson Devil with Burning Soul . Ark Cradle . During Yusei ' s Duel against Z - ONE Greiger was seen cheering on Yusei . Greiger later appeared in episode 152 where he was seen briefly being defeated in a duel by Jack , who was self - training himself to once again regain his crown as the King of Riding Duels . He commented on how Jack ' s skills had improved once more . Manga biography . Greiger appeared in the manga and debuted during the opening ceremonies of the D1GP . He entered the tournament in order to get a rematch with Jack Atlas who had defeated him years before the manga took place , and humiliated him in the process and stripped him of his title . He was a contestant in the tournament , but was ultimately defeated by Yusei and his Seven Swords Warrior . Non - canon appearances . In " Yu - Gi - Oh ! 5D ' s Duel Transer " , Greiger could be found on the sixth floor of Bifrost if you had an " Earthbound Immortal Chacu Challhua " card . His Deck Recipe was unlocked upon his defeat , which was unusable due to the presence of three " Dark Strike Fighter s " in his Extra Deck , which was Forbidden at the time . Decks . Ground . In Ground Duels , Greiger used a " Reactor " Deck , which focuses on summoning his " Reactor " monsters and punishing his opponents for summoning monsters or activating cards by inflicting damage until he summons all three " Reactors " in order to Special Summon " Flying Fortress SKY FIRE " . Turbo . Greiger also used a " Reactor " Turbo Deck , which also focused on his " Flying Fortress SKY FIRE " , and gathered the necessary monsters through cards such as " Fake Explosion " and " Hidden Soldiers " . If his original strategy failed , he used his " Dark Strike Fighter " as a contingency alongside cards such as " Dark Flare " and " Chariot Pile " to inflict large amounts of effect damage . Upon becoming a Dark Signer , Greiger acquired " Dark Flattop " , which he used to support his " Flying Fortress SKY FIRE " . He also used cards such as " Darksea Rescue " and " Darksea Float " to replenish his hand as his strategy required a large amount of cards . If this failed , he used his " Earthbound Immortal Chacu Challhua " as well as a burn strategy through cards such as " Basara " .