Charononus

It's Roshar. I'm pretty sure terrible things will happen.

That is only one of the problems. The bigger one with is breath. Unless Roshar is hyperoxygenated which is unlikely due to how rocky most areas are, The only way past that is magic and on Roshar that means spren.

I'd like to know when the intermixing was. Pre-shattering or not? The quote doesn't make that completely clear, and I think that might be important to the history of Roshar.

Yup.

I agree. Though I'm not sure he'd have enough nicrosil to compound it. Nicrosil would be very hard to make with Final Empire tech. Getting more than a ring worth every few months to year would probably not happen. And I'm an optimist on their ability to make Nicrosil, some people believe it would be completely impossible to do.

I don't think this works exactly. I think Bondsmiths are going to be an odd one to classify. By bondspren I assume you mean the spren that are seen when a windrunner sticks stuff together. The adhesion spren for lack of a better word. I don't think the stormfather is one of these with more investiture. I think he is a unique being that didn't come from just adding more juice to another spren.

I clipped quite a bit out, but left in the points that I wanted address. Using the spoiler tag as well for consistency.

Pretty sure Ruin called it's self Ruin not Ati. It might just be a function of holding the shard. Honestly after SoS I'm not convinced that here is much of Sazed left.

Just a couple thoughts here. "It's coming brings the god's their night" It is the everstorm. It's going to bond every parshendi and parshman it hits. It's going to destroy their true personalities and send them to a silence. That sounds pretty doomy like others have mentioned. "so the night will reign, for the choice of honor is life." We know that the parshendi somehow dropped out of god form in the past to become parshendi as we know them. They lost much accomplishing this but it did happen. Perhaps it happened due to something Honor did. The Parshendi had life instead of being puppets. The quote may not be so much prophecy but lost history.

Considering Vasher seems to be able to interchange them, I don't know if it would really be that odd.

This has always been my theory as well. Many others think the metal is from autonomy but I see it the same way you do.

Probably. Like I said I think it's possible it would just take such odd circumstances that I don't see it happening.

Correct me if I'm wrong on this, but a returned is a human soul that gets a splinter added to it and goes back into the body reanimating it and changing it. I don't think the soul disappears when a returned dies, and another splinter in theory could hook onto the soul again imo. So the question to me becomes if the process of returning once changes the body too badly for the soul to enter it again. Of course the soul also has to be willing. Endowment has to be willing. So I think I'd rule it as possible, but extremely unlikely.

Pretty sure that someone says that atium is very delicate and you can't leave it in your stomach for long because after a couple hours in your stomach it would break down. So unless ruin had an atium removal team on duty in each case, I'd say that atium is going to be gone too.

Pretty sure that it's mentioned that arrows aren't that useful against Koloss. Also I seriously doubt that the rest provided by gulping down more atrium allowed them much more than the rest to go that couple of hours.

This is it exactly imo. It doesn't matter if you know the blow is coming if you physically can't get yourself out of the way due to weariness. These were seers not mistborn so no pewter for them. They could make the Koloss pay a huge price, but they'd tire rapidly, likely in the couple hours mentioned, and then that's it for them.

Sorry but I don't see it. Think of the mistings in the first mistborn trilogy. (I don't believe we know for sure if Sazed tried to change snapping or even if he could so I'll discount the 2cnd books). Does Ham lack agency? Breeze? Allrianne? If all of these people can have something violent in their lives happen and not lose their agency, why would people on Roshar be different?

Well my take on why they might have violence in their past in general comes from other books. I'm going to put the below in spoilers. Mistborn Elantris Warbreaker Now I haven't read all the short stories in the cosmere so I'm not going to be able to get into those systems. (yet) However you could say that most magic systems in the cosmere from the major titles seem to require something violent to have happened.

So I found the quote that I was looking for. Chapter 36 of WoK This is what convinces me that Jasnah has had something violent happen in the past, and with the way rape is constantly added into the conversation, I'm inclined to believe that that was part of it.

We see a little bit of what happens to one Hoed here. http://brandonsanderson.com/elantris-the-hope-of-elantris/ Looks like there is some healing but they do remember would be my guess still. PTSD would probably be a safe opinion.

More like Hoid.

Here's the real question. Did he trap his (I think it was) granddaughter behind the rock on purpose to give himself a way to get Jasnah to soulcast?

In and of it's self, I don't think Autism is enough to consider someone broken, and honestly I'll be very disappointed if it is. Now how he's treated because of it, as he grew up, that's another story. But that would likely put his cracks into an as of yet unknown mental issue. I don't have a book in front of me at the moment, but when I recently reread WoK, the scene with the footpads made me wonder if her issue deals with an attack, possibly rape in the past.

Ok my understanding of it. You have the shard which exists as a body (physical), a cognitive influence and shadow, and spiritual. The body however is described as being power. The holder gives it a full cognitive state, though still influenced by the shards intent, and the holders body becomes power. In Vin's case this means that imo her body became mist when she ascended. When the bearer dies however the part of the power that was their physical body initially coalesces back into a corpse. You can see this as Leras fell out of the mists after talking to Elend iirc. Vin drops out of the mist at the end, and Ati drops out of some smoke. (BTW does anyone see Ruin's smoky form looking like the smoke monster in Lost?) Last thing I'd add in, I think this is how Odium potentially splinters shards. Smash the holders initial body in such a way that the shard can't spit them out. The shard now bears too much without there being a full cognitive presence and shatters into little tiny pieces.

It makes me think of one of these. https://en.wikipedia.org/wiki/Glass_harmonica#Franklin.27s_armonica