Fracturing Weapon

The Forge of War (FoW)Eberron (3.5)
School
Transmutation
Casting Time
1 standard action
Components
V, S, DF
Range
Touch
Target
One melee weapon
Duration
1 round/level
Saving Throw
Will negates (harmless, object)
Spell Resistance
Yes (harmless, object)

Once per round for the spell’s duration, the wielder of the targeted weapon can declare a single melee attack to be a fracturing blow. If that attack successfully deals damage to an opponent, the foe takes a —5 penalty to Armor Class and damage reduction (if any, to a minimum of 0).

The penalties are applied after the damage from the fracturing weapon attack has been resolved. The penalties last for a single round, but the wielder can attack it again on his or her next turn and attempt to reinvoke the penalty.