The Staff of the Lower Planes

The Staff is an artifact made from the defiled bones of a pit fiend and a balor that functions as a staff of beguiling, casts mass charm (3/day), and fulfill another's wish (1/day). The staff causes 3d6+14 hp damage to any being hit in combat. Fiends struck by the staff must save vs. death magic or be instantly polymorphed into a larva (MR applies at half). Only Anthraxus or a night hag can use the staff's powers. Any other being touching the staff must save vs. polymorph at -6 each round of contact or be transformed into a larva.
The staff was fashioned by Anthraxus's hag creators at his request when he lost the title of Oinoloth. Some in the Merkant sect have speculated that the price for the hags' cooperation in making the staff would secure more than a few Prime worlds.