Free card (フリーカード Furī Kādo) is one of the classification of cards in Z/X -Zillions of enemy X- TCG and also one of its main gimmick as a "free-to-start" card game. Free cards in Z/X TCG are similar to sample decks or freebies in other trading card games. However, one of the main characteristic of free cards in Z/X is that all of them are legal to be used in official tournaments and events. The rarity of all free cards are fixed as Free (F), and they also can be copied and printed for use. For the list of all cards that also available as free card, see .