Every month, a Z/X official tournament (公認大会 Kōnin Taikai) endorsed by Broccoli is held in various card shops in Japan. In addition, all participants will also receive a special promotional card which is always changed every month.
This is the list of all promotional cards that was given away as participation prize (参加賞 Sankashō) for official tournament. With the exception of "Murmur of Demise, Ende" and "Pram the Oracle", the Hologram Rare version of these cards were also given away as the Winning Prize (優勝賞品 Yūshō Shōhin) and Door Prize (お楽しみ賞 Otanoshimishō) for the tournament.
From March 2015 to July 2015, each promotional cards is given backstory with a goal that must be achieved as the "mission" for that month. At the end of month, the amount of participants for that month is tallied and the result is used to determine the story's conclusion in a similar manner to Heroic Saga.
Depending on the result, the story's goal may or may not be achieved. If the goal is achieved, a new card based on the story's conclusion will be created. Better result will yield a better achievement for the goal, and the created card will be different depending on the achievement.