The Polypore stick is a drop from the Ganodermic Beast, which require level 95 Slayer to kill. The Polypore stick can also be bought on the GE.
Uses:
The stick requires 80 Magic to wield.
Notes:
Equipping the staff does not give many bonuses; however, if you have 3000 Polypore spores, 15,000 Fire runes, and 80 Farming, you can turn the stick into a Polypore staff.