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quot;Return to the Spirit World, Part 1", known as "The Ancient Forest: Invitation to the Spirit World" in the Japanese version, is the eighteenth episode of the Yu-Gi-Oh! 5D's anime. It first aired in Japan on July 30, 2008. Due to Rex Goodwin's special permission, a consolation game is to be held. Luna is called to participate. Leo is unable to substitute and Luna reluctantly comes forward. Her opponent, Professor Frank, has a trip to the Duel Monsters Spirit World planned. Lazar talks with Frank

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