These are dangerous, pirate-infested waters, and you cautiously send rat-infested ships across them, to establish lucrative trade at far-off merchant-infested ports. When you finally reach those ports
you will conquer them, and from there you will look for more rivers.
One day, all the rivers will be yours.
This is the 2nd addition to Dominion that adds 26 new Kingdom cards. Dominion: Seaside is an expansion to both Dominion and Dominion: Intrigue. As such, it does not contain material for a complete game.