So from what I understand you have spawn points that spawn random cards from the objects array. It is not clear tho what those below 6 cards represent. So when do you call the function to spawn. And do you call a function when you play a card. Anyways, what I suggest is that make a player manager script...and do all the things like generating cards, playing cards in it...that way you can have a variable of number of cards...and change that variable whenever you play a card or draw cards.