Episode 126

"The Day the Devil was Born" (悪魔が生まれた日 Akuma ga Umareta Hi) is the one-hundred and twenty-sixth episode of Yu-Gi-Oh! ARC-V anime.

Synopsis
As Yūri attempts to turn Sora into a card, Yūgo appears before him and challenges Yūri to a Duel. While a fierce battle between Yūri and Yūgo unfolds, Yūshō, as well as Reiji and others, manage to reach Leo Akaba. Leo begins speaking about the Demon Duelist who leads the world to destruction as well as the four dragons. What is the reason that the world is divided into four dimensions?