Nicrosil

Nicrosil is the external enhancement pushing metal. An Allomancer burning nicrosil is able to enhance the effects of another Allomancer's powers. Feruchemists can use nicrosil to store Investiture, and when used as a Hemalurgic spike, nicrosil steals Investiture. It is the paired alloy of chromium in the Metallic Arts. While the exact composition of Allomantic or Feruchemical nicrosil is unknown, real-world nicrosil is an alloy primarily of nickel, with some chromium and a small amount of silicon.
== Allomantic Use ==
A nicrosil Misting is known as a Nicroburst. A Nicroburst burning nicrosil and touching another Allomancer will cause the latter's reserves of the metals that are currently burning to disappear and give a huge burst of power to the recipient. This could be used either to enhance an ally Allomancer or to hinder an enemy Allomancer.
=== Allomantic Interactions ===
* Iron/Steel: While Pulling or Pushing with nicrosil, an Allomancer gains an explosion of power, but grants them a far greater base strength, allowing them to Pull or Push on objects far heavier or Invested than normal. These Pulls/Pushes could become so strong it can feel like the Allomancer is being torn apart. A Coinshot could also launch incredibly far with a single Push.
* Tin: While burning tin, a Tineye risks being shocked by the sensory overload and becoming temporarily numb, blind, and deaf.
* Pewter: While burning pewter, a Thug can withstand or deal damage far greater than normal. A Thug could also briefly resist the effects of drugs, but this does not remove the effects of the drugs long term.
* Zinc/Brass: Pulling or Pushing on emotions while burning nicrosil causes the targets to feel an intense Rioting or Soothing of their emotions. Those Soothed feel a flattening of emotions, making them feel empty and devoid of all feelings. Those Rioted feel an intense flare of emotions, making them to be more likely to act. Nicrosil also allows an Allomancer to Riot/Soothe the emotions of a Smoker through a coppercloud momentarily. When combined with emotional Allomancy, nicrosil also allows Allomancers to "break into" and gain control of Hemalurgic constructs such as kandra and koloss, even if they would not normally have enough raw power to do so. 
* Bronze: While burning bronze, a Seeker feels Allomantic pulses much louder and more acutely than normal. With nicrosil, Seekers can also feel Allomantic pulses through a coppercloud momentarily, although not as effective as being able to pierce the coppercloud naturally. This combination also allows emotional Allomancy to work on smokers.
* Cadmium/Bendalloy: While creating a time bubble with nicrosil, an Allomancer can condense or expand the time that the bubble is affecting. For bendalloy, this makes the time inside the bubble compressed, and from inside, time outside the bubble slows to a complete halt. For cadmium, it is likely the opposite effect, expanding the time outside the bubble and being able to skip time at a much faster pace. Cadmium's effect specifically is important for FTL space travel.
* Atium: While burning atium, an Allomancer is able to see farther into the future, by allowing them to peer into the Spiritual Realm.
=== Other Invested Arts Interactions ===
Burning nicrosil could potentially be used to gain a burst of power from other forms of Investiture, such as Surgebinding or Feruchemy.
== Feruchemical Use ==
A nicrosil Ferring is known as a Soulbearer. Nicrosil is used to store Investiture. This ability is not understood (even by those who utilize it). A Soulbearer storing Investiture stores their ability to use their Investiture. Therefore, a Soulbearer could store their ability to use Feruchemy and another person tapping it would be turned into a temporary Feruchemist who has the ability to fill a metalmind (assuming the nicrosilmind was unkeyed). Among other things, a nicrosilmind can be used to store the divine Breath of the Returned and the ability to use various surges of the Knights Radiant. Filling a nicrosilmind as fast as possible hides a person from an Awakener's life sense.
=== Compounding === 
Next to nothing is known about the possible applications of Compounding Feruchemical nicrosil, however it is theoretically possible to create a metalmind as Invested as Nightblood.
== Hemalurgic Use ==
When used as a Hemalurgic spike, nicrosil steals Investiture. This does not steal powers—the ability to use Invested Arts like Allomancy or sand mastery—but rather general Investiture, such as a piece of a person's soul or BioChromatic Breaths.
If a Scadrian is stabbed with a spike Invested with stolen Investiture from another Scadrian, they may temporarily gain Allomantic powers.
== Trivia ==
* In the Mistborn Adventure Game nicrosil can be used to convert between forms of Investiture. This allows for a Feruchemist to convert between attributes stored in their metalminds (i.e. converting the mental speed in a zincmind into the strength in a pewtermind).
==Notes==
es:Nicrosil