Merciful Weapon

The caster causes one weapon to loose its sharpness or hardness so that it deals subdual damage instead of normal damage.

The Quintessential Paladin
Author Alejandro Melchor
Series Quintessential Series
Publisher Mongoose Publishing
Publish date 2002

Transmutation

Level: Cleric 2, Druid 3, Paladin 1, Ranger 1, Sorcerer, Wizard 2
Components: V, S, M/DF
Casting Time: 1 action
Range: Close (25 ft. + 5 ft./level)
Target: One weapon.
Duration: 10 minutes / level (D)
Saving Throw: None (Object)
Spell Resistance: No

The spell does not work on natural weaponry such as claws and fangs, but it does work against artificial weapons that have somehow become part of the creature, such as a sword that is fixed onto a construct. The weapon does not get a save if its owner is willing to have it affected or if it is left unattended. Weapons carried or wielded by unwilling owners make a Fortitude saving throw with their owner’s save bonus. Magical weapons roll a Fortitude save as normal.

Material Component: A fistful of clay.