Critical Role, the popular Dungeons & Dragons streaming group, has announced their fourth campaign, set to premiere on October 2nd. In a significant shift, Brennan Lee Mulligan, known for his work on Dimension 20, will be taking over the role of Game Master. This marks a departure from the group's tradition, as founding member Matthew Mercer has served as the GM for all previous main campaigns. The announcement has generated considerable excitement among fans eager to see Mulligan's unique storytelling style applied to the Critical Role universe.