You can have 6 card at a time. They also have different ranks on them, they range from Grade B (Levels 30-69), A (Levels 70-119), S (Levels 120-199) , SS (Level 200). The higher the ranking, the better stats. The card deck adds stats to every character in the same world. Simple as that.
3 Comments • Newest first
It is a system where you can gain extra stats, and ability
The character you have currently can give you different ability and it is depends on character's job, lvl.
Example
-Mechainc lvl 100, gives +15% Buff duration
-Demon Slayer lvl100 gives +3% Status Resistance
Also 1 card can be used per deck (You can't use same card on same deck, but can be set on differnt deck)
and there is 2 decks
and Unlimited Ptahcthere will be 3 decks but same card can't be used in whole 3 decks.
Also some card set gives extra effect.
Example
3 hero cards gives set effect of +7 all stats
3 Warrior gives +Damage% ratio ed by character's HP
Keep in short, it's good for you
You can have 6 card at a time. They also have different ranks on them, they range from Grade B (Levels 30-69), A (Levels 70-119), S (Levels 120-199) , SS (Level 200). The higher the ranking, the better stats. The card deck adds stats to every character in the same world. Simple as that.
http://www.basilmarket.com/MapleStory-Character-Card-System.html