Many of these cards have game mechanics that I don't even know how they would work outside of that.
Such as some summons, which are only activated when the player's avatar is present, such as sub-space skills.
Others are more direct, such as CAA, which are generally just attacks that increase themselves and do more things (such as reducing enemy statistics and increasing their own).
The most straightforward are the Boss skills. Since the guys are bosses they are super broken, honestly sometimes it's ridiculous.
In the bosses we have abilities such as "always recovers stamina", "cancels enemy damage increase", "cancels multipliers" and Goku SSJ4's ability that everyone likes, "Dimensional Domain"
These are good, straightforward skills with practically no game mechanics involved.