A lot, literally a lot f2p deck. But everyone just complain this game is pay to win, just STFU. Go to YouTube and search for f2p deck if you dont know how to spend the gem, a lot of channel give guide, for example duel links meta. I just dont understand how people can complain the game is pay to win. I reach KOG rank easily without spend any single money. If you don't know how to play just search a guide, don't blame the game.