Hades' Staff

Hades' Staff was Hades personal weapon before the Sword of Hades was made. It is a double pronged spear (a bident) and most likely made of Stygian Iron. It is unknown if he still uses the spear.

The Sword of Hades
When Percy, Thalia, and Nico discuss the sword with Persephone, Nico tells her that Hades usually rides into battle with his staff.

The Last Olympian
After Percy bathes in the River Styx, Hades appears riding in a black-and-gold chariot with a small army of undead warriors. Percy defeats the army easily and jumps into Hades' chariot. Hades raises his staff and tries to blast Percy with a dark bolt of energy but Percy deflects the blast with Riptide.