Server side.
item_db.txt
ID,AegisName,Name,Type,Buy,Sell,Weight,ATK,DEF,Range,Slots,Job,Upper,Gender,Loc,wLV,eLV,Refineable,View,{
Script },{ OnEquip_Script },{ OnUnequip_Script }
ID,Name card,Name card,6,20,,10,,,,,,,,Localisation,,,,,{},{},{}
Put an unique ID, a name not necessarily unique and the localisation ( nb. where you insert the card)
For Localisation :
Client side.
System/itemInfo.lub
data/cardprefixnametable.txt for prefix equipment name when you insert your card in equipment (optionnal)
data/num2cardillustnametable.txt if you want an illustration of your card (optionnal)
data/texture/À¯ÀúÀÎÅÍÆäÀ̽º/cardbmp/ to put the illustration (optionnal)
itemInfo.lub
Just follow the typo. Change the Display name, the description for identified/unindentified item. That's all.
cardprefixnametable.txt
Add in your file a line following the typo
Card ID#Prefix#
num2cardillustnametable.txt
Add in your file a line following the typo
Card ID#Name in cardbmp#
cardbmp/
Add your illustration in bmp format 300x400