Shadow Of Doubt

Enchantment (Compulsion) [darkness, emotion, evil, mind-affecting]
Level: Antipaladin* 4, Bard * 4
Components: V, S
Casting Time: 1 Standard Action
Range: close (25 ft. + 5 ft./2 levels)
Target: one creature/3 levels
Duration: 1 round/level
Saving Throw: Will partial, see text
Spell Resistance: yes
  You create a shadowy aura of doubt fueled by a foe's own inner flaws. Targets perceive all illumination as if it were one light level darker, to a minimum light level of Darkness (not supernatural Darkness), even on a successful saving throw. Fleeting mental shadows of regrets and anxieties distract the spell's targets; at the start of each of their turns, they must each succeed at a Will Save or be Staggered for 1 round. A good-aligned target takes a -4 penalty on saving throws against this effect; an evil-aligned target gains a +4 bonus instead.