Random Magic Weapons (any level)

The weapon deals +1d6 points of damage, and all the damage it deals is subdual damage. On command, the weapon suppresses this ability until commanded to resume it. Bows, crossbows, and slings with this ability bestow the merciful effect on their ammunition.
Aura: Faint Conjuration
Caster Level: 11th
Requirements: Craft Magic Arms and Armor, cure light wounds
Price: +1 bonus
Source: Dungeon Master's Guide v.3.5
Arms and Equipment Guide