Astral World Astral World ( アストラル " Asutoraru Sekai " ) is the dimension where Astral was born and a location in " Yu - Gi - Oh ! ZEXAL " series . It is regarded as a parallel world without Chaos and the counterpart of Barian World . According to Astral , only individuals who have " Ranked Up " in a spiritual way can reach this world . Originally it strives to " Rank - Up " towards a higher plane of existence by destroying Barian World , with which Astral was to achieve as its envoy . However , this has changed following the Duel between its godhead , Eliphas , and Yuma Tsukumo . Design . Structure . Astral World is a world made of various powerful energies and is colored light blue with shades of purple and dark blue . Etymology . Astral means " of the stars " and is also used to described things relating to a nonphysical realm of existence . Astral World is referred to as the " アストラル " ( Asutoraru Sekai ) . Anime . History . When Kazuma Tsukumo fell from a cliff in a snowy mountain during one of his explorations with his wife , he landed in Astral World , and obtained the Emperor ' s Key . It is unknown if that was just his spirit as his body was severely damaged when he woke up , though Astral has stated that only those with " ranked - up souls " may enter Astral World , which may be obtained by an individual working towards their greatest dreams . Five years before the WDC , Kazuma , Dr . Faker and Byron Arclight went on an exploration to find the door to parallel worlds . Dr . Faker betrayed his companions and used them as sacrifices to open the door . As a result , the two of them were sent to alternate dimensions : Kazuma ended up in Astral World , while Byron ended up in Barian World . Dr . Faker later made a pact with a being from Barian World that if he destroys Astral World , he would obtain the power to conquer the Earth . Therefore , he used Hart Tenjo ' s powers to transport large amounts of trash through a small hole in space into Astral World , where they would detonate . However , this is revealed to be fraudulent and Faker had really made the deal in order to cure Hart ' s illness and the destruction of Astral World was the price the Barian demanded for his services . Following these attacks , Astral was sent to Yuma Tsukumo ' s world with a certain mission . Astral conjectured this was Kazuma ' s plan to defeat Byron , now Vetrix , and Dr . Faker ' s machinations . However , Vetrix speculated that Kazuma had sent Astral as his own instrument of revenge against Faker . In truth , Astral was sent in order to retrieve the Numeron Code , an all - power card that can shape reality before the Barian s are able to find it . , with which he must use to annihilate Barian World . and therefore allow Astral World to " Rank - up " to a higher realm of existence . Yu - Gi - Oh ! ZEXAL . It is first seen when Astral obtains his third memory as as result of acquiring " " . Astral had not previously remembered where he came from . Astral later recalls Astral World under attack , being assaulted by numerous explosions as its unseen denizens scream . Astral World has a counterpart called Barian World . Kite Tenjo correctly guessed that using a stone from that world found inside Orbital 7 would open the Emperor ' s Key , which comes from Astral World , and he mentioned the world itself when Astral questioned him about why he hunts the " Number s " . Later during their Duel , Astral said a legendary power called ZEXAL can save his world . Astral World and another world sent a wave of energy that collided with the Human World , causing time to temporarily stop and a sun from each world to appear . Dr . Faker explained that it is because the worlds are getting closer . Dr . Faker also said that something bad will happen soon because of this . When Vetrix began the ritual to steal Hart ' s powers , the former was able to briefly see Astral World while taking more power from the latter . The Vetrix Family as a whole seems to be familiar with Astral World as well , as Trey recognized Astral as a being from that world when he briefly saw him . After Number 96 mastered the power of Chaos , he opens a portal to this world and Barian World , then he launches powerful attacks into both worlds and there were screams from the denizens of this world . Mentioned by Eliphas , everything is capable of Shining Draw in this world and explained that it is the true Dueling style of his world . He told Yuma that Astral ' s mission was to destroy Barian World , which Astral has not accomplished and instead he became attacked and possessed by the power of Chaos . Eliphas told Yuma that his partnership with Astral caused the problem . However , when Yuma was able to defeat Eliphas in a Duel , he and the citizens of Astral World became convinced of a new possibility for the future and that abandoning Chaos was a mistake , thereby allowing Yuma and a newly - revived Astral to end the war with Barian World as they saw fit . After defeating Don Thousand , Astral later used the Numeron Code to reunite the high - energy dimensions into a single parallel world . Eliphas mentioned this also allowed Chaos to return , causing upcoming challenges to take place . Manga . In the manga , Dr . Faker and Mr . Heartland ' s goal is to destroy Astral World , because they claim that it is evil , and that otherwise our planet will be destroyed . They also refer to Astral as Astral World ' s messenger , who should be destroyed as well . According to Dr . Faker , Haruto Tenjo has a hidden power that allows him to communicate with the spirits of Astral World . It seems that Haruto can also create powerful attacks , like a huge fireball , and send them directly to it through a portal . When Astral absorbs " " , he recovers the memory of Astral World being under attack . Luna tells Shark that Dr . Faker must be stopped . Also , after absorbing three consecutive " Numbers " , Astral explains he recovered some memories : his enemy is Dr . Faker , who plans on using the hidden powers of the " Numbers " to destroy Astral World ; However , it is linked to this world . So , if Astral World is destroyed , this one will be destroyed as well . The Numbers Club then decide to save the world from Dr . Faker . In a flashback , Kazuma Tsukumo is shown telling Akari Tsukumo that he discovered Astral World . He explains that that ' s where Duel Monsters are from , and that supposedly , the souls of the people there exist in a higher plane than ours . Some time later , Kazuma and Mirai disappeared in Astral World . Kazuma appears to Akari as a spirit revealing that he found a way in to Astral World . He tells Akari that this world would soon suffer a great disaster and that Yuma would be the one to open a new path to save it , and gives Akari the Emperor ' s Key to give Yuma . Citizens . Like Astral , the residents of Astral World , minus Kazuma Tsukumo and Mira Tsukumo , have varying shades of blue skin . They were injured by the attacks launched by Hart Tenjo and Number 96 , causing them to suffer injuries such as cracking faces . Yuma was able to cure them with the power of Chaos . Relationships . Earth . Just like its counterpart , Astral World and Earth are connected . When humans die , it is possible for them to be reincarnated in Astral World if their hearts are noble and pure . Barian World . Due to Astral World ' s desire to Rank - Up , any soul who possesses the power of Chaos , was banished from this world , leading to the creation of Barian World . To further its desire to Rank - Up , the Astral World sought to destroy Barian World through Astral , but through Kazuma and Yuma ' s efforts , the world began to consider abandoning the power of Chaos an error . This mistake is resolved once a changed Astral used the Numeron Code to fuse the two worlds back together , which brought up many new challenges for the world in the process . Yuma Tsukumo . Unknowingly , through Astral bonding with his missing other half , Yuma managed to convinced Eliphas of their world ' s folly of banishing Chaos - wielding souls from Astral World and trying to destroy Barian World .