Released on March 1, 2000, Booster 7 was the fourteenth Yu-Gi-Oh! OCG booster pack, and the last in Series 1. Like other cards printed early on in the game, the cards have no printed set numbers, and lack the distinctive holographic "Eye of Anubis" in the lower right-hand corner of each card. This set was only sold in vending machines called Carddass.
Of the 40 cards in Booster 7, all but seven ("Ancient Sorcerer", "Beautiful Beast Trainer", "Grappler", "Job-Change Mirror", "Megazowler", "Monster Tamer", and "Night Lizard") have since been reprinted in the English TCG.