Sage (Final Fantasy III)

The Sage is a job class in Final Fantasy III, both the NES original, and the Nintendo DS remake. It is gained in the hidden land of Eureka in the original, while it is gained from the Earth Crystal in the DS version.

NES version
The Sage has the ability to cast every magic in the game, as well as the high level summon magic, making them a real threat. MP growth is higher than the Shaman, Warlock, and Summoner, so the Sage effectively makes those classes obsolete.
 * Special Ability - All Black and White Magic, Summon Magic

DS version
MP growth is limited, meaning they can't use the high level magics as much as the Devout, Magus or Summoner.
 * Special Ability - All Black and White Magic, White and Black Summon Magic