This is to discuss the game, Mabinogi Duel. It was globally released at the end of November, and received the highest score from tradingcards.com.
It is for android and Ios, and is FTP. It has true trading and you can buy and sell cards with other players. I’ve played Hearthstone, Duelyst, and Solforge but this game is by far my favorite. Give it a shot.