Staff of Striking

(Requires attunement)
The staff has 10 Charges. regain 1D6+4 per day
When you hit with a melee Attack using it,
you can expend up to 3 of its Charges.
For each charge you expend, the target takes
an extra 1d6 force damage. If you expend the
last charge, roll a d20. On a 1, the staff becomes
a nonmagical Quarterstaff.
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