Dominion is not a collectible card game (CCG), but the play of the game is similar to the construction and play of a CCG deck. The game comes with 500 cards. You select 10 of the 26 Kingdom card types to include in any given play—leading to immense variety.
Dominion (Second Edition) replaces six Kingdom card types from the first edition with six new types of Kingdom cards, while also replacing the blank cards in the game with a seventh new Kingdom card. These new cards are available on their own in the Dominion: Update Pack. The rulebook has been rewritten, three cards have mild functional changes ("you may" added to Moneylender, Mine, Throne Room), and other cards have been rephrased (while remaining functionally the same).