Blizzard Storm

When you cast this spell, an large burst of ice resonates from you can deals an instant 3d10 cold damage op any creature in range. After the burst, a blizzard is created within range. At the start of your turn, another burst resonates from you, dealing 2d8 cold damage and they take a Dexterity saving throw, halving their speed on a failed one. While moving within the space of blizzard, if a creature moves more than 10 feet, they must make a DC 14 Dexterity saving throw or fall prone.