You encase the weapon used in the spell’s casting with freezing mist 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 plus cold damage equal to your spell attack modifier and is weakened by the freezing temperatures. Until the end of your next turn the target looses 1d4 from the next strength, dexterity, or constitution saving throw it makes. 

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d8 cold damage to the target on a hit. Damage rolls increase by 1d8 at 11th level (2d8) and again at 17th level (3d8).