Arctic Blade

You brandish the weapon used in the spell’s casting, infuse magic into it, and make a melee attack with it against one creature within the weapon's normal range. The weapon glows with a frigid blue light and on a hit, the target suffers the weapon attack’s normal effects, takes an additional 1d6 cold damage, and its speed is reduced by 10 feet until the start of your next turn as the cold energy of the spell transfers onto them.

If the targetted creature is wet or standing in water, it must succeed on a Strength saving throw or be further enveloped in ice and unable to make Reactions until the start of your next turn.

This spell’s cold damage increases when you reach certain levels. At 5th level, the damage increases to 2d6 cold damage, and to 3d6 at 11th level, and to 4d6 at 17th level.