Ep. 1: The Heart of the Cards

Seto Kaiba overhears Yuugi Mutou telling his friends that Sugoroku Mutou, Yuugi's grandfather, has a rare card called the "Blue-Eyes White Dragon". Obsessed with owning them all, Kaiba challenges Sugoroku to a duel and when his holographic arena technology proves too much for the old man, Yuugi steps in to duel to avenge his grandfather's defeat. (Source: Yu-Gi-Oh! Wikia)

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