Warning: This is 3.0 Edition material. It is possible that there is more recent 3.5 Edition version.
Inaccurate?

Mental Weakness

(Oriental Adventures)

Enchantment (Compulsion) [Mind-Affecting]
Level: Shaman 3, Maho 3,
Components: V, S, AF,
Casting Time: 1 action
Range: Touch
Target: Living creature touched
Duration: 1 round/level
Saving Throw: Will negates
Spell Resistance: Yes

This spell weakens the subject's mental resistance, giving him a -4 penalty on all Will saves.
Focus: The tail of a red fox.