Opened but all cards are good as new as I have purchased a combo set and swapped the cards out

Dominion is a deck-building game created by Donald X. Vaccarino and published by Rio Grande Games. Each player uses a separate deck of cards to which only they have access; players draw their hands from their own decks, not others'. During turns, players use their cards to perform various actions and purchase cards from a common pool of card stacks available to all players, including those that give them more actions, coins to purchase cards, and victory cards that are otherwise valueless during the game. At the end of the game, defined when certain common stacks are exhausted, the player with the highest number of victory points wins. The game has a light medieval theme, with card names that reference pre-industrial, monarchical, and feudal social structures.