Blizzard Blade

You brandish the weapon used in the spell's casting and make a melee attack with it against one creature. On a hit, the target suffers the attack's normal effects, and an icy blast covers the target with frost until the start of your next turn or until a creature uses its action or reaction to remove the frost from itself or another creature. A creature covered in frost has its movement reduced by 10 feet and takes 1d6 cold damage at the start of its turn.

This spell's damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d6 cold damage to the target on a hit, and the damage from the frost increases to 2d6. Both damage rolls increase by 1d6 at 11th level (2d6 and 3d6) and 17th level (3d6 and 4d6).