Merciful CharmConsumable 3
Source Pathfinder #176: Lost Mammoth Valley
Price 9 gp
Weight negligible
Activate 
envision
Trigger You Strike with the affixed weapon
Requirements You're trained in the affixed weapon.
This small limestone pendant is typically carved in the shape of clasped hands. When activated, the affixed weapon gains the nonlethal trait for the triggering attack and all other attacks for 1 minute.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
AbjurationEffects and magic items with this trait are associated with the abjuration school of magic, typically involving protection or wards.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
TalismanA talisman is a small object affixed to armor, a shield, or a weapon (called the affixed item). You must be wielding or wearing an item to activate a talisman attached to it. Once activated, a talisman burns out permanently.