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{{Infobox/Yu-Gi-Oh!/Charactercharacter| defaultsort = no | image name = King of the Underworld.jpg | english name en_name = King of the Netherworld | japanese name ja_name = 冥界の王 | romaji name romaji_name = Meikai No Ohno Ō | asian english name it_name = King of the UnderworldRe degli Inferi| gender = Male | anime debut anime_debut = {{episode|Yu-Gi-Oh! 5D's|62|ref}} | appears anime appears_in_anime = ''[[Yu-Gi-Oh! 5D's]] | gender = unknown''

The '''King of the Netherworld''', was the consequential ruler of what was known as the Netherworld in the ''[[Yu-Gi-Oh! 5D'King of the Underworld's]]'' in the Japanese version, is the consequential ruler of what´s known as the Netherworldanime.

==Overview==At first , he was only mentioned briefly by the [[Dark Signers]]' leader, [[Roman Goodwin]] in his rematch against [[Yusei Fudo]]. Roman described him as the "Ultimate God", the one that was said to be the mightiest of them all, and that the Earthbound Immortals served him.

According to [[Roman Goodwin|Roman]] , it would appear, if the four control towers for the original [[Ener-D]] Reactor are were not activated [[activate]]d before sunset, as by then , the Door door to the Netherworld will would be opened.

After [[Akiza Izinski|Akiza]] fails failed to seal the Lizard Tower before sundown, the Condor geoglyph then appears on appeared in the sky towards toward the direction to where [[New Domino City]] iswas. After this, as the original Enerdy reactor[[Ener-D]] Reactor's light is emanating emanated from inside the [[B.A.D ]] area crater, suddenly then the Netherworld´s Ruler emerges King of the Netherworld emerged from it.

At first , it takes took the form of a giant mass of dark slime, but then it begins began to mutate and acquires acquired another distinctive shape, . While the King of the Netherworld started on its new form resembling path toward the formed [[Fifth DragonNazca Lines|Nazca Line]], but remaining a dark gray and having several skeletal features[[Kuribon (character)|Kuribon]] warned [[Luna]] that they must not let it reach the Condor geogylph.

While the King of the Netherworld starts on its path toward the sky formed Nazca Line, [[Kuribon (character)|Kuribon]] warns [[Luna]] that they must not let it reach the Condor geogylph. The [[Crimson Dragon]] also appears appeared and transports transported the [[Signers ]], along with their companions , to where the [[Stairway to the Dragon Star]] is, where [[Rex Goodwin]] himself is was waiting. As he reveals revealed his true identity as the final Dark Signer , with the Condor mark glowing upon his back, he explains explained that he must complete a the ritual for the King of the Netherworld to gain its full power. Goodwin then proceeds proceeded to declare a [[Shadow Turbo Duel]] that will , which would be held within the Condor geoglyph , as the ritual to welcome the Ruler of the Netherworld, one which ultimately requires required [[Signers]] to be sacrificed.

After Rex Goodwin, summons [[Summon]]ed "[[Earthbound Immortal Wiraqocha Rasca (anime)|Earthbound Immortal Wiraqocha Rasca]]", the King spots spotted it and dispatches dispatched an army of smaller condors to [[attack ]] [[Yusei Fudo|Yusei]], [[Jack Atlas|Jack]] and [[Crow Hogan|Crow]](although in Signs of Doom Part 3, the King of the Netherworld managed to take out [[Jack]] on Goodwin's order). However , they are were fought off by [[Ancient Fairy Dragon (character)|Ancient Fairy Dragon]] and [[Black Rose Dragon]], who have been able to which could be summoned by [[Luna]] and [[Akiza Izinski|Akiza]], thanks to the geoglyph.

After Yusei finally defeats defeated Goodwin, the Crimson Dragon arrivesarrived, using and used Yusei`'s "[[Majestic Star Dragon (anime)|Majestic Star Dragon]] " to gain physical form in order to attack the King. The Netherworld´s Ruler attacks ruler attacked them with a massive beam, but Yusei and the Crimson Dragon pierce pierced through and enter entered the King`s body. The moment that Yusei is was inside of it, he sees saw the defeated Dark Signers along with Goodwin, who has had returned to his old self, as well as his brother [[Roman Goodwin|Roman]].

{{-}}As both brothers thanked Yusei, they informed him that the other Dark Signers would be revived. However, both brothers decided to remain. After they crossed over into the light, Yusei and the Crimson Dragon passed right through the King, which disappeared soon after as a golden ray of light emerged from its body, and vanquishing it. ==Trivia==* Upon reshaping itself into a detailed form, it strongly resembled "[[Life Stream Dragon (anime)|Life Stream Dragon]]".