The "Circle of Eight" refers to a group of eight influential figures in the history of the Dungeons & Dragons role-playing game. This group was instrumental in shaping the game's development and expanding its universe during the late 1970s and early 1980s. The members included notable designers and writers who contributed to the game's rules, settings, and adventures. The term is often associated with the Greyhawk campaign setting, which was one of the first official settings for Dungeons & Dragons. The Circle of Eight is depicted as a council of powerful wizards who work together to protect their realm from various threats, showcasing the collaborative nature of storytelling in role-playing games.