The "Nightmare of the Frogmire Coven - Maps & Monsters Expansion" for Dungeons & Dragons: Onslaught is a new product by WizKids, set to release in 2023. This expansion includes additional maps and monsters to enhance the gameplay experience for fans of the popular role-playing game. With detailed miniatures and engaging content, this expansion is sure to provide hours of entertainment for both new and experienced players alike.