Rex Goodwin behauptet, dass er der fünfte Auserwählte ist. Er erklärt, dass er die Weltherrschaft übernehmen will, indem er die Macht des Feuerroten Drachen und die des Königs der Finsternis vereint. Um Goodwins Pläne zu durchkreuzen, fordern ihn Yusei, Jack und Crow zu einem Turbo-Schattenduell heraus.
As the Condor geoglyph shines in the sky, a massive monster emerges from the Original Ener-D Reactor and heads towards the Condor geoglyph over New Domino City, which was the King of the Netherworld. The Crimson Dragon appears and sends everyone to the front of a temple (the Altar of the Dragon Star), where they find Goodwin, who reveals himself to be a Dark Signer. Then, he transfers Roman's mark of the Dragon Head from a canister to his left arm, destroying the metallic arm that was covering it at the same time.
He challenges Yusei, Jack and Crow to a Turbo Duel in the air. Goodwin reveals that he lost the duel with Roman prior to his battle with Yusei on purpose, and became a Dark Signer in order to end the pointless cycle. He summons out both a Synchro monster; Sun Dragon Inti, and its Dark Synchro counterpart; Moon Dragon Quilla. He also reveals he was the Legendary turbo duelist who constructed and flew across the Daedalus Bridge. Crow manages to destroy Sun Dragon Inti, whose special ability then causes Crow to take damage equal to Blackwing Elfin the Raven's attack points, and due to Sun Dragon Inti's temporary destruction, Moon Dragon Quilla then ressurects from Goodwin's graveyard. Then, Goodwin uses his Mark of the Dragon Head to steal all of the Signers' marks, and then he gains the Seal of the Crimson Dragon himself.
Le Roi du Monde Souterrain s'est réveillé depuis la Zone B.A.D. et s'approche dangereusement de Neo Domino City. Rex Godwin, qui tente d'utiliser à la fois le pouvoir des Pactisants et des Pactisants des Ténèbres pour devenir un Dieu, s'engage dans un Turbo Duel avec Yusei, Jack et Crow.
サテライトにある旧モーメントからコンドルの地上絵が現れると共に、大地が鳴動し始める。そこへジャックとクロウが現れ、一同が揃ったのも束の間、"冥界の王"が出現し、シティを目指して動き出してしまう。『赤き龍』の導きにより、レクス・ゴドウィンのもとへと向かった遊星たちは、「シグナーとダークシグナー」の二つの力を得たレクスに、「冥界の王」を迎える儀式として、シグナーを生贄にするライディング・デュエルを行うと宣言される。
遊星、ジャック、クロウによる最後の戦いが、今始まる！
