Amnesia (status)

Amnesia is a recurring status effect in some Final Fantasy games which has several effects, depending on the game.

Final Fantasy II
Amnesia is a stronger form of Silence. It prevents the use of magic spells and it never wears off, and is cured by a Mallet, and caused by the spell Fog.

Final Fantasy XI
Amnesia is a status effect in Final Fantasy XI which prohibits a player from using any form of special job ability. Players can still cast spells and attack as normal. Imps are the most common imposers of the status effect with their common ability abrasive tantara, though Lamiae and Ladybugs also have the ability to inflict the status.