Rod of Retribution

The rod has 3 charges and regains all its
expended charges daily at dawn. When a
creature you can see within 60 feet of you
damages you while you are holding this rod,
you can useyour reaction to expend 1 of the
rod's charges to force the creature to make a
DC 13 Dexterity saving throw. The creature
takes 2d10 lightning damage on a failed save,
or half as much damage on a successful one.