From Dragon Quest Wiki

Kadim is a spell introduced in Dragon Quest Monsters: Joker. It costs 4 MP to cast and reduces all enemies' wisdom by 50%. It can be learned from various skill trees.

Dragon Quest Monsters: Joker[edit]

Kadim can be learned from:

Dragon Quest Monsters: Joker 2[edit]

Kadim can be learned from all the skill it could be previously, though Antimagic II now requires 49 points. It can also be learned from Stormsgate Citadel for 69 points.