Are you talking about the ETC item called Monster Card or the monster cards that are added to the monster book?
no! example: 500pcs squashy liquid trade 1 slime monster card! i think its good way to gather monster cards for unlucky guys haha monster book card
also, limited boss monster card like Opq ppq, trading 1000 pcs star + moon + sun piece is dood idea for missed boss monster i think !!!
Oh I thought you meant the other way around, like somehow storing the extra monster cards and then trading them. I like the idea! Could be interesting.
The only reason I don't like this idea is because then getting the best medal in the game would just be pay to win (buy etc. drops with mesos). I like the challenge behind the way it is right now but maybe it'd be cool to see it with untradeable etc. items.
In that case, we can limit it to just Level-limit PQ Boss cards, if willing, as well as the extremely hard to get ones like Batoo and Homunscullo.
umm i think buying card for mesos is challenge in another mean and... only few ppl will sell etc items, because ppl know ulu, petri is best for earning mesos! i really sad ppl throw away their etc items calling useless.. i wish etc items is useful all monster without specific quest haha
or if possible make it so that you have to sacrifice 2 cards (either randomly selected in your book, for you have to fetch 2 random cards via a quest), in order to do the trade every time makes it turn into a risk, much like using a 30% scroll or clean slate want to P2W? well if you get junk cards at first and spam buying the hard to get ones, there is a chance the hard to get ones are gonna get sacrificed by the will of the almighty RNG