Wet sleeping bag

Rolls up his cold wet drity sleeping bag like a towel in a locker room. Whips it at the target causing cold damge 

The target must make a Constitution saving throw. On a failed save, the target takes 1d6 cold damage, and it has disadvantage on the next weapon attack roll it makes before the end of its next turn.

The spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).