A Faekiller blade is a dreaded weapon of assassination designed to bring Final Death to faeries. The weapon is alchemical in nature, and is made to enhance iron’s magic-disrupting properties.
Ordinary Iron is also capable of killing a Fey, but is necessary to cut or otherwise wound the victim. The mere touch of a Faekiller blade will often leave burns. The alchemical process for making the blade leaves the iron in a brittle state. Sometimes there may even be visible cracks in the metal. This makes the iron unsuitable as a weapon of combat. Because of this, a weaponsmith will usually make special daggers from the metal. They take advantage of the iron’s brittleness by designing the blade to break off inside a victim’s body, allowing the iron to continue poisoning them.
There are rumors that a weaponsmith has overcome the problem with brittleness, and made a small number of Faekillers made into combat-capable swords. These True Faekillers are extremely rare and expensive, due to their questionably legal nature.