Jitterbugs

Illusion (Figment) [mind-affecting]
Level: Artificer * 2, Bard * 1, Sorcerer */Wizard * 2
Components: V, S
Casting Time: 1 Standard Action
Range: close (25 ft. + 5 ft./2 levels)
Target: one creature
Duration: 1 round/level
Saving Throw: Will negates
Spell Resistance: yes
  You cause the target to perceive itself as being covered in creeping, crawling, stinging bugs. This causes the target to become jittery and unable to stay still, forcing it to constantly move and twitch. The target takes a -4 penalty on all Dexterity checks and Dexterity-based skill checks, and cannot take the delay, ready, or Total Defense actions.