Chromium
Chromium is the external enhancement pulling metal. An Allomancer burning chromium is able to make the metal reserves of another Allomancer vanish. Feruchemists can use chromium to store fortune, and when used as a Hemalurgic spike, chromium steals an unknown quality.
Allomantic Use
A chromium Misting is known as a Leecher. Chromium acts just like aluminum inside the body, causing any Allomancers touched by a Leecher to lose their metal reserves.[1] Chromium is already widely known as of the events of Shadows of Self, as shown when Reddi mentions that there is a Leecher in the Elendel constables' employ.
A Leecher could prevent a Shardbearer from summoning their blade.[2]
Feruchemical Use
A chromium Ferring is known as a Spinner. Chromium is used to store fortune. A Feruchemist filling a chromiummind will be unlucky, and can tap it to increase his luck.[1]
Hemalurgic Use
It is unknown what trait or quality chromium steals when used as a hemalurgic spike, as chromium is discovered after era 1 of Mistborn. It is only in Misborn era 1 that hemalurgy is in widespread use, and therefore only in era 1 that a list of the hemalurgic uses for metals is listed in the Ars Arcarnum.
Speculation
- Alonoe of the Ire mentions that drawing on Fortune can cause coincidences to happen.[3]
- Odium implies it may be used to predict the future.[4]