For A Few Dragons More
Staff of Corruption
This staff has 3 charges and regains 1d3 expended charges daily at dawn.
The staff can be wielded as a magic quarterstaff. On a hit, it deals damage as a normal quarterstaff, and you can expend 1 charge to deal an extra 2d10 necrotic damage to the target. In addition, the target must succeed on a DC 15 Constitution saving throw or have disadvantage for 1 hour on any ability check or saving throw that uses Strength or Constitution.
The staff was crafted by a child of Netheril, and enchanted by an elder.