Polar Midnight

At 3rd level, and every two levels thereafter, a sorcerer learns an additional spell, derived from her bloodline. These spells are in addition to the number of spells given at new levels. You plunge an area into the brutal chill of the arctic night. All creatures in the area take 5d6 points of cold damage and 1d6 points of Dexterity damage per round. A successful Fortitude save each round negates the Dexterity damage but not the cold damage.