Weaken

Necromancy (White)
Tier: 1
Components: Verbal, Somatic
Casting Time: 1 major action
Range: 120 ft
Target: One living creature
Duration: 1 minute/level
Saving Throw: Spell negates
He swings at you again, but the dwarf is pale and his hands shake.

Your spell weakens the target. The subject takes a penalty to Strength equal to 1d6 + 1. The subject’s Strength score cannot drop below 1.

Augmentation:
For each extra spell point you invest, you can increase the penalty by 1 (up to a maximum total of 1d6 + [⅓ caster level]).