Merciful Blade

Your weapon is surrounded with a soft white aura that abhors bloodshed.

Merciful Blade
Transmutation
Level: Clr 2, Pal 2, Sor/Wiz 2
Components: V, S, F, DF
Casting Time: 1 standard action
Range: Touch
Target: Weapon touched
Duration: 1 minute/level
Saving Throw: Will negates (harmless, object)
Spell Resistance: Yes (harmless, object)

As magic weapon, but all damage the weapon deals for the spell’s duration is nonlethal damage. This spell is favoured by pacifist clerics who prefer to avoid unnecessary bloodshed, and also useful in situations where the caster needs to take a foe alive.