People Are in Yu-Gi-Oh!, Starting with El Dorado

You Guang travels to a world where duels are supreme, activates the Duel Master system, and starts a set of Golden Kingdom decks to make the duelists on the opposite side smile. As long as you duel with others, you can get duel disks, crystals, cards and even the entire deck as rewards. Duel Native: "Why have I never seen those cards of yours?" "Why do you have so many different underworld cards, imperial wallpapers, divided heroes, and skill extraction? Don't use these things to duel if you can!" You Guang: "Okay, Silver City, Branded Blood-Burning Dragon, Yuanshu, Jushe Nuwei Clan, which divine monument do you choose?" "If that doesn't work, there's Thunder Spirit, Electronic Dragon, Sky Cup Dragon, Rescue, and Snake Eyes." "What? Still not working? Then I can only take out my weakest deck - Lament of Tears." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.