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From Pathfinder Impossible Magic, which isn't enabled.

Corrosive Staff

ITEM 4
MAGICALSTAFFTWO-HAND-D8
Price 85 gp
Usage held in 1 hand
Bulk 1
Category simple
Group club
Damage 1d4 bludgeoning

A sickly green liquid sloshes inside this hollow glass staff, carrying an acrid scent. While wielding the staff, you gain resistance 3 to acid damage.

Activate Cast a Spell
Effect You expend a number of charges from the staff to cast a spell from its list.
Craft Requirements Supply one casting of all listed ranks of all listed spells.
Pathfinder Impossible MagicORC