Hydaelyn

You manipulate ice aether to create a localized blizzard at a point you can see within range. Each creature in a 20-foot-radius sphere centered on that point must make a Constitution saving throw. A target takes 6d6 cold damage on a failed save, or half as much damage on a successful one. The ground within the blizzard becomes coated in slick ice for 1 minute or until melted. A creature traversing the slick ice at more than half speed must make a DC 15 Acrobatics check at the start of the movement, failing which causes the creature to fall prone.