In Mistborn, there are the 3 types of powers: hemalurgy, allomancy, and feruchemy.
Can Kandra use hemalurgy to take Allomancy and Feruchemy from humans, and then use it themselves?
Science Fiction & Fantasy Stack Exchange is a question and answer site for science fiction and fantasy enthusiasts. It only takes a minute to sign up.Sign up to join this community
Yes, in both cases.
We have known for a while that they can be given Allomantic powers by giving them the appropriate Blessing. No one on Scadriel knows how do to it, except Harmony.src In addition, a Kandra can burn Lerasium the same was a human would, and gain Allomancy that way.src
We just recently (with the release of Shadows of Self) learned that Kandra can also steal Feruchemy from others via Hemalurgy. In this case.
the Blessing involved isn't even know to Harmony, which implies that another shard holder is interfering on Scadriel.
For their part, the Kandra don't seem to be aware that Harmony knows a Blessing that would give them Allomancy. While discussing this exact topic, one of them says:
Maybe that's why she could use stolen Allomancy [...] when other kandra cannot.
Since all Kandra can speak directly to Harmony via their Blessings, this implies that Harmony is keeping that information from them.
As Mike has said, they can be granted Allomantic powers via the appropriate Blessing, or by burning Lerasium.
Revealed in the new book...
is the fact that Kandra can take and use Feruchemy and Allomancy from other people using Hemalurgy. The main antagonist "Bleeder" in the book is a Kandra that does exactly that. The details of how to do it are in Marsh's book, given to Marasi at the end of Alloy of Law.
Quotes from Shadows of Self:
And what are any of you going to do about someone who can move at the speed of a thunderclap?
The mists churned. Wax stumbled back, swinging his gun toward something that had passed in a blur, leaving a corridor of swirling mist. Bleeder. Moving with Feruchemical speed.
I will point out that
Bleeder may be the only Kandra to do this, given that it is using a spike of an unknown metal (unknown to Harmony!) from an unknown source (Probably another shard holder, Trell is given as a possibility) to transfer Feruchemical powers.