Cards
Cards can be played to accomplish a variety of tasks. The game creator can pick which cards will be available in their game, so be sure to check the game settings to know which types of cards you're dealing with.
Cards can be divided into any number of pieces. You cannot play a card until you have collected the entire card.
When you take an enemy or neutral territory, at the end of that turn you will receive a piece of a card. You can't get more, no matter how many territories you take. Games can also be configured to give more than one piece per turn. In this case, players who take a territory will always get exactly that number of pieces configured by that game each turn.
When you play a card, that card is consumed. You may only hold onto a certain number of cards at one time, so there can be occurances where you must use a card.
If a game has multiple types of cards included, the type of card(s) you get is determined randomly based on their weight. It's also possible to configure minimums that remove the randomness, either partially or completely.