Dungeons and Dragons Onslaught Nightmare of the Frogmire Coven - Maps and Monsters ExpansionWhile deep in your cups at the Distant Lands Inn you are ambushed by a hunched and hooded stranger whose very presence chills you to the bone. Before you can react fell sorcery transports you and your companions to the dark heart of the Frogmire swamp. Ensnared by a sinister coven and beset on all sides the nightmare is just beginning This expansion set is a companion to the Dungeons & Dragons: Onslaught Harpers vs. Zhentarim core set featuring