OrcusOfUndeath

If you can do that, then the opposite must also be true for Kelsier

I'd take some broken from of compounding.

I'd say that stealing Divine Breath is almost certainly possible as we know that Hemalurgy can steal other forms of Investiture and this is a significant form of Investiture. I never heard of it not being able to steal breath in particular and its been difficult to read up on it with Theoryland down, but I can understand why it couldn't steal ordinary breath. I agree that bind points are the greatest hurdle to overcome. But I think that experimenting with Trellium alone (as a blank slate) could help them in this. And Spook wasn't necessarily limited to Scadrial in experimenting with metals. We don't know exactly how it works but we know that it works on Kandra and that someone who isn't Saze knows how to do it. And they've had hundreds of years to experiment with Hemalurgy in various ways and forms and the simple fact that (Cosmere aware) Kelsier is alive proves that they've done something extremely amazing and never before seen with it. So I don't think that any other development would be impossible per se. They could have also joined forces with scholars from Nalthis and exchanged knowledge.

But being a Sliver expands a person. I mean we specifically know his Cognitive Self is expended at least. So I think he'd way more easily understand such things than a regular person. The safest metal to use would be Trellium as we've seen it is capable of stealing a lot of stuff existing within the Spiritual Realm, so why not Divine Breath.

I looked it up on wikia and seems I misremembered. It says this: This residue has many effects, one of which is that a person who is capable of noticing Investiture would be able to look at someone and tell that they are a Sliver. I mean its not clear 100% to me what this means with Theoryland down

A Sliver has an innate ability to notice forms of Investiture.

Don't forget that Kelsier is a Sliver. He can see Investiture now. And seeing Divine Breath would be fairly easy I recon. Knowing bind point on Scadrial can help them greatly in any case.

Well Kelsier has always been the type of person to not really care about anyone but his friends (and sometimes more about his goals than them). By the end of Secret History he seemed to be more compassionate thought. I don't think he'll be a true villain, but he'll always be a morally questionable character. Also, I think Hemalurgy will be able to capture the Breath without it consuming itself ever. And that's kind of the whole thing with Hemalurgy. It steals power. So basically a splinter of Endowment would be spliced into Kelsier. And if the theory that Divine Breath consumes itself because the dead need the energy to survive and they can't live any other way because they are dead, I think that would not apply to Kelsier for a few reasons. First he will always have a piece of Preservation in him (plus he's also a sliver of Adonalsium) and second because he would then be kept alive not by Breath but by the Hemalurgic charge within all the spikes and third he could burn feruchemical atium and gold. He just needs the Breath to create a Connection, nothing more. And so I think that the Breath will not consume itself in any of these cases.

It would work just as well if Spook went to get Breath or some other form of investiture capable of forming a Connection. I think Breath is the safest one so far as we know for a fact that it can renew a Connection. But a mix of Divine Breath and Hemalurgy would be the way to go if you'd want to revive Kelsier permanently. And essentially make him immortal. Imagine using a fresh Spike on a Returned. You'd essentially be getting a sizeable Splinter of Endowment in your Hemalurgic spike. And if they had any additional breath that would just be a bonus.

Good to be here. I actually think its possible to recreate his old body using his bones, based on his Cognitive Shadow. We know that Kandra can change appearances and mold their bodies, so I don't think why it would be a stretch to recreate a body, given material and Hemalurgy. He just needed a Connection back to his physical self and there could be ways of doing this with Hemalurgy or something else. I could imagine Cognitive Kelsier going to capture some Breath (or Spook) and then animating his bones (or just using the same mechanic as the Returned) and creating a Connection and then keeping the body via Hemalurgy. If Kelsier himself can't manage to do this because he's a Cognitive Shadow, someone else maybe could create the Connection. I think being a Sliver can only help this situation.

As people said he's actually I'm actually expecting to see way more of Kelsier in the future or even the current Eras of Mistborn. And also some of the other Cosmere stories. Too much has been set up with him for there not to be a massive payoff and he seems to have begun to understand the Cosmere very rapidly. Not to mention his beef with Hoid.