The thunder of cannons sounds in the dark, and sporadic flashes of fire and smoke dance across the night sky as the army of the dead lays siege to the land of the living! It has been fifty years since the Alamo fell, and Santa Ana's legions marched to war. One legion dispatched to the north to investigate tales of a magical black rock never returned... until now. Back for revenge, the Lost Army marches once more, a corrupt echo of conquest and glory still driving their animated husks to war! This Mission Pack Expansion introduces a new enemy type: The Lost Army! It contains a set of twelve Lost Army Undead Soldiers as well as a new objective-room map tile, over forty new cards themed for battling the overwhelming numbers and powerful weaponry in this army of the dead, and four new missions.