The top of this magic quarterstaff is shaped like a spider

 It deals an extra 1d6 poison damage on a hit when used to make a weapon attack.

Spells. The staff has 10 charges. While holding it, you can expend the requisite number of charges to cast one of the following spells from the staff: spider climb (1 charge) or web (2 charges; spell save DC 15).

The staff regains 1d6 + 4 expended charges daily at dusk. If you expend the staff’s last charge, roll a d20. On a 1, the staff crumbles to dust and is destroyed.