What was the fist yu gi oh card?

The first Yu-Gi-Oh! card ever printed was "Dark Magician". It was released in the "Legend of Blue-Eyes White Dragon" booster set, which was the very first set released for the game. This set was released in Japan on December 4, 1999.

While "Dark Magician" wasn't the very first card in the set, it is considered the most iconic and recognizable card from the first set.