Sag

From Dragon Quest Wiki

Sag is a spell introduced in Dragon Quest Monsters: Joker. It costs 6 MP to cast and decreases one enemy's attack damage by 25%.

Dragon Quest Monsters: Joker

Sag can be learned from:

Dragon Quest Monsters: Joker 2

Sag can be learned from all the skills it could be previously, though Diabolist now requires 53 points.