Nirvana

Nirvana is a reccuring weapon in the Final Fantasy series. It is the most powerfull staff in the games it appears & is commonly used by White or Black Mages.

Final Fantasy IV
In the GBA version, only Porom can equip Nirvana, which casts Reflect when used as an item and is found in the Lunar Ruins.

Final Fantasy X
The Nirvana is Yuna's Celestial Weapon, and is can only be obtained at Monster Arena in the Calm Lands. It requires the Moon Crest and Sigil to attain its maximum power.

Final Fantasy X-2
Yuna holds the Nirvana when she is in her Black Mage Dressphere.

Final Fantasy XI
The Nirvana is the Summoner's Mythic Weapon. It reduces avatar perpetuation cost by four (exceeding even Bahamut's Staff), increases magical attack power of avatars by a significant amount, and features the unique "Garland of Bliss" weaponskill.

Final Fantasy XII: Revenant Wings
The Nirvana is one of Penelo's strongest staves and can only be crafted in the Sky Saloon.

Final Fantasy Tactics Advance
The Nirvana is a powerful staff that can teach Full-Life to White Mages, Holy to Bishops, and Phoenix to Summoners.

Final Fantasy Tactics A2
Nirvana Staff reappears with the same functions from the previous game.