From the website:
Warhammer Underworlds: Shadespire is an action-packed combat game for two players. Build your warband, construct your deck, and defeat your rivals.
Shadespire was once a city of wonder and magic, a mercantile metropolis whose rulers defied death, to the fury of Nagash. This fury was made manifest in something worse than destruction – drawing upon the mysterious power of the shadeglass that gave the city its power, Nagash tore away the light and glory of Shadespire, leaving it a twisted reflection of its former splendour. Those adventurers foolish enough to set foot within its walls are trapped, with all hope seemingly lost. Yet not all will accept their fate without a fight…