Feruchemists are individuals in the Mistborn series by Brandon Sanderson who possess the ability to store their physical and mental attributes in metal objects called metalminds. By doing so, they can access these stored attributes later, allowing them to enhance their abilities or recover from injuries. This unique skill set distinguishes them from other magic users in the series. The process of storing attributes requires the Feruchemist to temporarily give up a part of themselves, such as strength or memory, which can be retrieved later. This makes Feruchemists versatile and resourceful, as they can adapt to various situations by managing their stored traits effectively.