Cumbrous Will( Savage Species, p. 31)
You have a greater chance to resist attacks against your willpower, but at a cost.
Iron Will (PH) ,
Before rolling a Will save, you can decide to activate this feat, which gives you a +6 bonus on your saving throw. After the saving throw is resolved, regardless of the result, you are shaken until the end of the encounter. A shaken character takes a -2 morale penalty on attack rolls, checks, and saving throws.