Feruchemy

Feruchemy is the second magic system in the series. Feruchemy works differently from the other magics. While an Allomancer burns metal to gain power, a Feruchemist can use these sames metals as holding units, or minds, to store up their own power. Basically, depending on the metal, a Feruchemist can become worse at something in exchange to be equally better in the future. No power is gained or lost.

The major strength of Feruchemy versus Allomancy is the speed at which one can access its power. While a Feruchemist must provide the power for the magic from himself, storing it over time, an Allomancer can simply consume metals to power the magic. However, an Allomancer has limits to how much power they can draw at once; a Feruchemist can draw out the power of the metalmind with virtually no upper limit, exhausting it in one massive burst if they so choose. For instance, a Feruchemist tapping a pewtermind can be far, far stronger than even a very powerful Mistborn burning pewter, if only for a short time.

Feruchemy is in the genes of the Terris people.