The Sage is a recurring vocation in the Dragon Quest series. Proficient with both schools of magic, they are often the most powerful casters in their respective games.
In order for a party member to become a Sage, that member must be level 20 and have the Words of Wisdom and take it to the Alltrades Abbey. There, they may become a Sage. The Gadabout is the only class that doesn't need the scroll to become a Sage; instead, all they need is to reach level 20.
In order to become a sage in Dragon Quest VII, the party member must first master both the Priest and Mage classes. As a Sage, that particular party member's spells will cost less MP to cast as their rank increases, eventually casting for only 50% of the original cost.
Restores all dead party members to life at the cost of the life of the caster but has a chance of failure. It will not work if the caster is the last person alive
(The Sage vocation is late in the game after completing Quest 115. Sages have the unique skillset "Enlightenment", and can also use skill points to learn Boomerang, Bow, Wand, and Shield skills. Their Coup-de-Grace is "Spelly Breath," which recharges a portion of their MP.
Sages are no longer the literal hybrid of mage and Priests, but nevertheless have access to incredible magical capabilities. They can reinforce the party with kabuff and magic barrier, decimate foes with darkness and explosions, and keep their allies alive with Multi-and-Moreheal. However, Sages can't deal the same level of damage Magi can, nor can they heal as effectively as a Priest. Thus, parties seeking powerful multi-target damage should stick with a Mage, and those wanting powerful healing spells should stick with a Priest. On the other hand, combining the elements of a Mage and a Priest can free up a slot in the party, allowing for more versatile combinations.