A unit suffering cold damage may freeze. It will then take additional fatigue damage until it thaws. While it is frozen, it takes 2d6 fatigue damage per turn and incurs a -3 penalty to attack and defense.

Cold vulnerability counts as negative cold resistance. Units with 5 or more cold resistance, units with heat auras, and ethereal units will never freeze. Cold scales work like heat scales for burning: if it’s cold in the province, the chance of thawing is reduced by the scales.