Ancient and gruesome monstrosities, the Feral Vampires are terrifying creatures of the old world, unleashed upon the Western frontier after traveling thousands of miles by ship, train, and coach in coffins or crates of their native soil. They are neither living nor dead...but the Undead! And they hunger for the fresh blood of a new frontier.

Each of the Mission Packs offered in the Add-Ons menu is a themed adventure set including a new Enemy type, new cards themed for those Enemies, a set of new Missions involving them, and a new Objective Room Map Tile that, like the other map tiles in the game, is double-sided. It has an Old West Mine side and an OtherWorld side, both for use with the themed Missions of the set.

Shadows of Brimstone: Vampire Nest Mission Pack includes 6 Feral Vampires.