Staff Of Withering

Useable only by a Cleric, Druid or Warlock.
This staff has 3 charges and regains 1d3 daily at
dawn. It can be wielded as a quarterstaff. On a
hit, you can expend 1 charge to deal an extra
2d10 necrotic damage to the target. The target
must also succeed on a DC 15 CON saving
throw or have disadvantage for 1 hour on
STR and CON ability checks and saving
throws.