Cold iron

Cold iron was a type of iron. It was forged at a lower temperature than normal iron or steel, in order to preserve its properties. It was mined deep underground and famed for its efficacy against fey creatures.

Cost
Cold iron weapons cost twice as much as their standard counterparts and enchanting them cost an extra 2000 gp.

Notable Cold Iron Items

 * The rare holy avenger blades prized by paladins were forged of cold iron.
 * The wizard Sememmon possessed masterwork daggers made from cold iron.
 * Cold iron was known to be forged into thick manacles, used to restrain wizards, containing their magical abilities.