Club activity is very similar to trading card game. You create a deck of your own and take on NPC as an opponent . To create your deck, keywords are used instead of cards in TMO world.
You may wonder how you can manage to obtain
keywords. Don't worry. Basic set of keywords
are given when you create your character. Additional keywords are sometimes provided after the game and/or mini-RPG (to be described later). In addition, you can even define new keyword by using keyword and items you already have. This user-defined keyword is called "
Ougi" (arcanum, in English).
Do you want to have PC as an opponent? Sure! "
Voluntary training" mode is for you. It is almost the same as
Club activity except for that your opponent is not a NPC but a PC.
I have very little experience playing
Club activity (and
Voluntary training) during beta2 test. Thus, further explanation is beyond my reach. If you are familiar with trading card games such as Yu-Gi-Oh!, you may like it. It is noted that playing
Club activity is not mandatory.