A fanart of a Steel Inquisitor by Inkthinker at Deviantart.com. Notice the Hemalurgic spikes in the eyes and torso.
Hemalurgy is the third magic system in the Mistborn Series. To use Hemalurgy, a metal spike must be driven through the heart of someone. Then the spike is taken and stabbed into a body of another person, the spot depending on the power transferred. The prefered method is to stab it directly through the heart into the other person, as the longer it is left out of the body the more power is lost.
While Allomancy is the art of Preservation and Feruchemy is the art of balance, Hemalurgy is the art of Ruin, as the transfer of power destroys some of it. Allomancy creates power, and Feruchemy does not destroy or create any power.
Hemalurgic Metals
Iron
Steals human strength
Steel
Steals allomantic physical powers
Tin
Steals human senses
Pewter
Steals feruchemical physical powers
Brass
Steals feruchemical mental attributes
Zinc
Steals human emotional fortitude
Copper
Steals human mental fortitude
Bronze
Steals allomantic mental powers
Aluminium
Steals allomantic enhancement powers
Duralumin
Unknown
Atium
Steals allomantic temporal powers
Malatium
Unknown
Gold
Unknown
Electrum
Unknown
Hemalurgy + Allomancy
When an Allomancer increases a certain aspect of themselves using Hemalurgy this aspect can gain new powers assuming the Allomancer can already use this power.
What each metal does after Hemalurgically increased is as follows.
Iron
An Allomancer is able to pull much harder. Since Steel Inquisitors can pull upon metals inside peoples bodies, it is assumed this power is granted also
Steel
An Allomancer is able to push much harder. Since Steel Inquisitor's can push upon metals in peoples bodies, it is assumed this power is also granted.
Bronze
A Seeker can pierce Copperclouds. Vin possesses this ability
Copper
A Smoker can prevent his cloud from being pierced, and put his cloud around a wider range.
Brass
A Soother is able to soothe peoples emotions at more drastic rates
Zinc
A Rioter is able to Riot peoples emotions at more drastic rates.
Tin
A Tineye is able to increase their senses to far higher rates.
Pewter
A Pewterarm is able to have incredible strength when burning pewter.