Staff of Swarming Insects-1/2

This staff has 10 Charges and regains 1d6 + 4 expended Charges daily at dawn. If you expend
the last charge, roll a d20. On a 1, a Swarm of
Insects consumes and destroys the staff, then disperses.
Spells: While holding the staff, you can use an
action to expend some of its Charges to cast one
of the following Spells from it, using your spell
save DC: Giant Insect (4 charges) or Insect
Plague (5 charges).