A metalborn could use one or all of the 16 metals to access allomantic or feruchemical abilities. Rare Twinborn had both a single feruchemical and a single allomantic ability, which may or may not have been in the same metal. Allomancers ingested their metal and then 'burned' it to gain their abilities while Feruchemists used metal to store a specific trait in which they could later draw out.
The Lord Ruler
During the history of Scadrial, there were a few organizations of Metalborn. The Keepers, for example, were a group of Feruchemists during the Lord Rulers rule, while the Worldbringers fulfilled a similar role before the Ascension of the Lord Ruler.
|The Metallic Arts|
|Arts||Allomancy · Feruchemy · Hemalurgy|
|Concepts||Metalborn · Snapping · Savants · Metalminds · Twinborn · Compounding · Blessings|
|Constructs||Steel Inquisitors · Koloss · Kandra|
|Base Metals||Iron · Steel · Tin · Pewter · Zinc · Brass · Copper · Bronze · Cadmium · Bendalloy · Gold · Electrum · Chromium · Nicrosil · Aluminum · Duralumin|
|God Metals||Atium (Malatium) · Lerasium|
|Books|| Era 1 (Mistborn: The Final Empire · The Well of Ascension · The Hero of Ages · Mistborn: Secret History)|
Era 2 (The Alloy of Law · Shadows of Self · The Bands of Mourning · The Lost Metal)
|Shards||Preservation · Ruin · Harmony|
|Magic||Metallic Arts (Allomancy, Feruchemy, Hemalurgy) · Metalborn · Mistborn · Misting · Savant · Ferring · Twinborn · Compounding · Atium · Lerasium|
|Other Media||Mistborn Adventure Game · The Eleventh Metal · A House of Ashes · Mistborn: Birthright · Mistborn film · Mistborn: House War|