Windows 10 64 bit, 8 Gm RAM, Intel(R) Core(TM) I7-4500 CPU1.80 GHz 2.40GHz GPU: AMD Radeon R7 M265, Intel(R) HD Graphics Family. Version game 2.1b6
Some wall tiles on the map cursed: imps start digging, but instead of destroying, they increase their health (not limited, even tens of thousands). Began this after use I a ritual of "construction."
Map: Great wall (official scenario).
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