The dominion box comes with something like 25 decks with about 12 of the same card in them. There are three different kinds of cards; treasure, victory points, and action cards. There are 3 different kind of treasure cards; copper(1), silver(2), and gold(3). There are 3 different kind of victory point cards; estate(1), dutchy(3), province(6). All of the other decks are different action cards that give bonus gold to spend, extra actions, more buying ability, ability to buy cards, etc. Only 10 of the action decks are used in any game. There are a couple different methods for determining which ones. Each player starts with a deck of 3 estates and 7 coppers. Each player's deck is shuffled and they draw 5 cards from the deck. During their turn the player can use one action card and buy one new card. When a player buys a card, whether it is a new action card, treasure card, or victory point card, it is placed on the top of their discard pile. At the end of the players turn, they put all of the cards they used AND the ones in their hand into their discard pile and they draw 5 new cards from their deck. When the deck runs dry (often) the discard pile is reshuffled and the game continues. Since the cards all have a different treasure cost, you may not have enough treasure in your hand to but the card you want. If you start snatching up alot of estates it dilutes the deck and you may have rounds with 5 victory point cards in your hand that have zero value until the end of the game. The biggest challenge for Dominion if Roll20 is that the player decks are being expanded very often as a normal part of game-play. How do you remove a card from one deck and put it in another in an easy and intuitive way. It is a really fun and addicting game. I recommend that you give the link I posted earlier a try. It is a very faithful version of the game online published by Rio Grande games (the publishers of Dominion). -Keith