Umezawa's Jitte-3/3

Icy Retaliation: When you hit with an attack using this magic weapon, you may choose to expend 3 charges instead of regaining expended charges. The target must make a
DC 16 Constitution saving throw. On a
failed save, the target takes 1d8 cold damage,
and it has disadvantage on the next weapon attack roll it makes before the end of its next turn.