Thorin's Freezing Blade

You conjure a blade of ice at a point within range. The blade then makes a strike a target within 5 feet of the blade. Make a melee spell attack. On a hit, the target takes 1d10 cold damage and their speed is reduced by 5 feet until initiative count 20.

The spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).