Fracturing Weapon

(The Forge of War, page 113, DnD 3.5)

Transmutation

Level: ; Assassin 4; Blackguard 4; Cleric 5; Duskblade 4; Hexblade 3; Paladin 4
Components: V, S
Casting Time: 1 standard action
Range: Touch
Target: Melee weapon touched
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.