Cards.csv and in-game console are your friends. (Download and open the Cards.csv with a spreadheet program.)
There's a simple way to see if a card is a monster only card: Visit http://live.cardhunter.com/data/gameplay/Equipment/Equipment.csv Then use a find tool and input the card name with some commas around it If 0 matches then it is monster only, if only a few matches it might be monster only, if more then 10 matches then it is not monster only.