Once part of Santa Ana's Mexican Legions, the Lost Army was dispatched northward to investigate a mythical 'black rock' with magical porperties found up in the hills. Presumed dead for over 50 years, they have now returned with a burning hatred for the living and their full compliment of siege weapons, now twisted into thunderous and deadly Hell Cannons! Description from the publisher: 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: Lost Army Hell Cannon and Crew includes a cannon and a crew of 2 undead Lost Army soldiers; it completes the Shadows of Brimstone: The Lost Army Mission Pack. Up to three may be required if using all Threat cards.