Like other cards printed early on in the game, the cards have no printed set numbers, and lack the distinctive Eye of Anubis Hologram in the lower right-hand corner of each card.
Of the 40 cards in Booster 4, all but 9—"Barrel Rock", "Emperor of the Land and Sea", "Fairy of the Fountain", "Fiend Kraken", "Gorgon Egg", "Mech Bass", "Orion the Battle King", "Spirit of the Mountain", and "Winged Egg of New Life"—have since been printed in the Yu-Gi-Oh! Trading Card Game.
Booster 4 contains 40 cards. Rarities are distributed as follows: