Blizzard

You create a spiraling storm of snow and ice surrounding you in a 30ft circle surrounding you. 

All creatures with thirty feet of the caster must succeed a constitution saving throws or take 10d6 cold damage and have their movement speed reduced by 15 feet, for each of their turns spent in the blizzard the creature takes an additional 2d6 cold damage. 

At 9th level the spells range increase by 10 ft around the caster