Short answers, pulled from the story.
The Final Fantasy Trading Card Game Chapter series was released in Japan in February 2011. This initial iteration ran until 2015 and contained 15 sets with 1098 unique cards printed solely in Japanese.
The Final Fantasy Trading Card Game Opus series launched globally in October 2016. Square Enix and Hobby Japan discontinued the Chapter series to replace it with this complete overhaul that expanded the player base into North America and Europe.
The Final Fantasy Trading Card Game uses a resource system called Crystal Points to dictate the flow of every match. Players generate these points by dulling Backup cards or discarding cards from their hand to pay the CP cost of cards they wish to play.
Victory in the Final Fantasy Trading Card Game is achieved by dealing 7 damage to the opposing player. When a player is dealt damage, they place 1 card per damage from the top of their deck face-up into their Damage Zone, and the player loses the game when their Damage Zone has seven cards.
The Final Fantasy Trading Card Game World Championship has been held in Tokyo, London, and Los Angeles. Winners of regional and national events receive a paid-for trip to this global circuit that mirrors the scale of the game's popularity.
The Final Fantasy Trading Card Game supports Constructed, L3 Constructed, Limited, Sealed, Draft, and Title formats. Constructed is the most common format, while Limited play allows for a minimum of 40 cards and games can be won by dealing the opponent 6 points of damage.