Talk:Cards/@comment-186.176.15.61-20200412210522/@comment-44941771-20200412220512

You can only combine card pieces (if you have enough pieces, you can check them in the Contacts, but the game will also remind you if you can combine one).

Cards themselves can't be combined, unless they're the same title & attribute for a character, in which case the skill level of the card will raise.