The dynamic landscape of digital entertainment is abuzz with a monumental announcement as Critical Role, a titan in actual-play D&D, gears up for its highly anticipated Campaign 4. This pivotal moment, a subject of much discussion among tech and media enthusiasts, brings a significant shift: the legendary Brennan Lee Mulligan is set to take the Dungeon Master’s helm, succeeding the revered Matthew Mercer. This new campaign introduces a bold ‘West Marches’ style format, featuring an enormous cast of 13 players divided into three groups. The announcement initially sparked some concern among fans about Mulligan’s already demanding schedule, as he continues to helm popular shows like Dimension 20 and Worlds Beyond Number.

Brennan Lee Mulligan’s Positive Outlook on His Workload
Despite the seemingly Herculean undertaking – a concern that often accompanies high-profile digital content creators – Brennan Lee Mulligan has swiftly addressed any potential burnout worries. Speaking candidly in a recent interview with Wargamer, Mulligan passionately dismissed the notion that his extensive workload was anything less than a dream come true. “It’s funny, because I’ve had multiple people check in on me because of the Herculean epicness of this undertaking,” Mulligan shared with his characteristic enthusiasm. He joyfully reassured everyone, stating, “I have to keep reporting to people that my mental health is at an all time high, because this is my favorite thing in the world, and I get to play this game with these amazing people.”
Mulligan’s Take on ‘The Mercer Effect’ and Gratitude to Matt Mercer
When discussing this significant transition in the actual-play sphere, Mulligan also touched upon the phenomenon known as ‘The Mercer Effect’—a term sometimes used to describe the pressure DMs feel to emulate Matthew Mercer’s professional style. With his typical candor, Mulligan, however, masterfully reframes the term entirely as a profound positive. He vividly recalled a conversation with Marisha Ray, stating, “I saw that term, and I was like, ‘Well, The Mercer Effect is that he’s the most wonderful, saint-like human being’. I joked to Marisha, ‘I’ll tell you what The Mercer Effect is: me and all my friends having a fucking job’.”
Mulligan expressed profound gratitude for Mercer, not only for his groundbreaking contributions to the actual-play community but for entrusting him with the rich history of Exandria. “If I can return a fraction of the kindness to Matt that he has shown to me, it will mean the world to me,” he said. True to his dynamic style, he couldn’t resist adding a playful warning for his new players: “And yeah, I’m definitely going to kill some of these guys. That’s for sure. Guaranteed, man.”
Tech enthusiasts and avid fans can mark their calendars: this compelling new era for Critical Role’s Campaign 4 is set to premiere on October 2 at 7 pm PT / 3 am BST. The show will be streamed live on the official Critical Role Twitch channel and Critical Role YouTube channel, ensuring global access to this exciting digital entertainment event.

