White Blade

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, the target suffers the weapon attack’s normal effects and then takes 1d8 Cold Damage, and then the spell ends

At Higher Levels. This spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (8), and 17th level (4d8).