Cold Iron

Cold iron is iron that has been smelted from ore at the lowest temperatures possible or otherwise separated from the gangue, but that is not ever heated again by any kind of fire (or equivalent temperatures). The iron is thus only cold-worked to form a weapon or tool of any kind. Spirits are harmed by the material. The shape of the material does not matter—it does not require an edge—only the contact between the spirit and the metal. While such weapons are nearly useless in combat with other people, they are indispensible when someone has no magic available to them to banish spirits (and rebuking the spirit has proved ineffective). Common people often put up a cold iron horseshoe (or other simple object) to keep spirits out of the house.
==Sources==
Wikipedia
TV Tropes
Category:Spirits
Category:Metal
Category:Materials