I sorta see it like this, but these are just my ideas, and they\'re probably way off
you can buy card box(inexpensive), which holds all of your cards and opens a sorting interface when used, then gather cards in a number of ways;
buying a small booster set, with five or ten completely random cards, could be literally anything, but it\'s expensive to buy them this way
trading, of course, use the interface of your box to move a card into your inventory to trade
random loot, any monster can give you a card that is appropriate to the monster, say you kill a goblin, you could get a goblin card(to add variety, you could have multiple lvls of the same monster available, say a goblin could be either a drunken goblin or a ferocious goblin)
a one time quest to earn a starter deck, again, completely random
then you create individual decks, which you name
sorting your cards into two stacks, effects and monsters, the first step would be to summon a monster, which is random according to what is in your monster stack, which can be up to half your cards(decks must be within 50 cards of one another to be played against one another, and a deck must be at least 100 cards, with no maximum limit) then you draw a hand of five-seven cards(just approximating) from your effects stack, every game turn, you are given the opportunity to use an effect card. when a monster dies, any effect cards that are associated with that creature dies with it. to dissapear back into your card box for the length of the battle
cards that have effects would include cards that
give you the ability to summon more than one monster
give monsters abilities-otherwise they just use a basic attack
allow your turn time to speed up
increase a monsters stats
and so on
basically the combat and turns goes like this
for the monsters, it\'s real time, they attack as normal
for players, every ten seconds a turn comes along, at which point, you have the opportunity to play one of your cards
now, feel free to tell me how badly I thought this out...