Place workers to perform actions and buy one of 150 unique creature cards. These cards can be played to strengthen your engine, defeat monsters, unlock bonuses, and score points. After 3 rounds, the player with the most points wins the game.
Each player starts with 3 workers, but you may unlock more workers over the course of the game. On your turn, you either place a worker (to perform action and buy a card), defeat a monster (to gain special powers, effects, or points), or move a worker (to gain income). Each round ends when all players have moved a worker.
After 3 rounds, you score points for defeated monsters, as well as cards in your engine and realms.