On this episode of Monsters and Multiclass Kevin, Will, and Jarred will discuss the Bard/Rogue multiclass and the Gibbering Mouther from the Monster Manual, page 157. Also don't forget about creative encounter building and this post by the Angry GM that facilitated a lot of our Gibbering Mouther discussion https://theangrygm.com/return-of-the-son-of-the-dd-boss-fight-now-in-5e/ !