Zero Reverse The Zero Reverse was a disastrous event caused by an intentional overload to the Ener - D system , which was incomplete and unstable at the time . The result of this led to negative energy which was sent down into the Earth in the form of a massive amount of dark energy . The first Ener - D system developed 17 years prior of " Yu - Gi - Oh ! 5D ' s " had this occurrence and resulted in a disastrous tectonic shift that split Domino City into two . Thus a channel into the Underworld where the Earthbound Immortal s were sealed was opened as well , which allowing them to spread their influence over those who were chosen by the Gods themselves . It was later revealed to be , however , a plot set by Iliaster in their ambition to destroy all traces of Ener - D , citing it as a mistake on human evolution that had destroyed their future , and the awakening of the " Earthbound Immortals " was an unintended side effect . In the future that Z - one , Aporia , Antinomy and Paradox came from , a similar disaster occurred with a more advanced Ener - D reactor , only this time , it was on a much larger scale , and destroyed most or all of the entire world . Background . It was revealed that the lead developers within the Kaiba Corperation R . R . D . were Yusei Fudo ' s parents and that they had both lost their lives during the catastrophic incident . The leader of the Dark Signer s , Roman Goodwin was involved in the project , along with his brother Rex Goodwin , and they were both assistants at that time . Later on , Roman told Yusei and the others that at first the research of the Ener - D was going smoothly , but soon unusual weather conditions and small tremors began occurring whenever the system was tested . Fearing the possibly of a disaster occurring if the Ener - D is completed , Professor Fudo ( Yusei ' s father ) , wanted to cancel the Ener - D research , as at the time the system itself was quite unstable . Furthermore , he came to the conclusion that there might be an accident , however his request to cancel the project was completely rejected by its sponsor . With the professor being uncooperative , the research ended up being handed over Roman as the new head developer . This all ultimately led to the occurrence of the incident , as Roman himself 17 years ago , was one of the chosen Signer s . Unfortunately , he had decided to take the path of darkness , and so he instead chose to become a Dark Signer . In order to be reborn as one , Roman killed himself by overloading the system which ultimately led to the disaster . The overloaded Ener - D reactor exploded and caused a massive tectonic shift which caused a chunk of Domino City to separate from the rest of the landmass , creating an island later known as Satellite , that island being the area hit hardest by the energy release . In the aftermath of the disaster , Domino City was separated into New Domino City and Satellite , and the old Ener - D reactor was left buried deep within Satellite . The public was told that the events were caused solely by a natural disaster ( this being the cover up story ) . One of the leaders of the R . R . D . ( most likely Rex Goodwin ) , had survived the accident , took over the Sector Security , created the massive cover - up story , and took all possible measures to ensure that no one would accidentally see through it and learn what really had happened . Years later , Iliaster tried to destroy New Domino City by recreating the Zero Reverse , albeit at a much larger scale than the first one , by using the Divine Temple ' s giant reverse Ener - D reactor crash into New Domino City ' s own Ener - D reactor . This was foiled after Yusei defeated Z - one and , after being redeemed by Yusei , Z - one crashing himself into the Divine Temple ' s Ener - D reactor in order to get rid of the temple .