A more compelling experience can be created by hiding some of the game information and allowing players to trade it for favors or other information. In the game Castle_of_Magic?, for instance, the game will end with exactly one of eight spells being cast. However, the conditions that lead to each spell are secret at the start of the game, as are the items that control several countries. Each player has a character card (also secret) that defines a scoring system for that character. The scoring depends almost entirely on the spell and the control of countries. Common goals between characters also lead to PlayerInteraction and the formation of Diplomacy.