This mini-expansion adds a whole new mechanic to the game, Location Cards. These cards, when played, place locations in the game where players may (and sometimes MUST) interact with those locations. Each location has its own effects. Locations may help you lose Corruption, find resources, or score VP for example. Once they are discarded from play, they leave the game. Unlike the other cards in the Cauldron: Bubble and Boil deck, these cannot be used in gardens. —description from the publisher