Cold Breath

You exhale a blast of freezing wind in a 15-foot cone. Each creature in that area must make a Dexterity saving throw, taking 1d8 cold damage on a failed save, or half as much damage on a successful one. Additionally, creatures that fail their saving throw have their speed reduced by half for one round.

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).