Ancient Orcs' Staff
Wondrous Item,
Rare
(requires attunement; cost 5000 gp)
Crafting Components
Four golden stakes driven through the hearts of four imps.
This wooden staff is covered in a spiral of archaic planarite from distant worlds, shaped into symbols, denoting the four tangible elements: air, earth, fire, and water.
While you are attuned to the staff, you have resistance to psychic damage.
This staff can be wielded as a magic quarterstaff. As an action, you can thrust the staff dramatically; the staff’s wood briefly turns to gold, and you immediately cast fireball without components (save DC 15), dealing your choice of acid, cold, fire, lightning, or thunder damage.
Once the staff has unleashed elemental power this way, it cannot do so again until the next dawn.
Source