Theoryland of the Wheel of Time

Will Sazed eventually go mad trying to hold two Shard's power at the same time (being pushed to two different Purposes simultaneously for millennia)? Why hasn't anyone else tried this trick before in the Cosmere?

No. Since they're so opposite they work together to create a whole. However, after a LONG time it would change him as a person.

Kwaan went into hiding, and he was eventually discovered and executed by Rashek. He wasn't among the First Generation, though he would have been if he hadn't turned against Rashek. Rashek kept the plate, however, just as he kept Alendi's logbook. Partially because even then, Rashek was going a little mad, but partially because of the reminders about his old life they contained.

VEGASDEV (17 OCTOBER)

I'm assuming you meant Alendi hunted him down because he turned against Alendi. Or did Kwaan also turn against Rashek?

BRANDON SANDERSON

No, I meant that he turned against Rashek. Remember, the members of the First Generation were offered immortality in exchange for their Hemalurgy. They had to make this choice for all of the world's Feruchemists. Because his uncle had been the one who gave Rashek the chance to become the Lord Ruler in the first place, Rashek blessed him and included him in the decision. (Speaking directly into his mind along with the others during Rashek's moment of ascension.)

Kwaan was the only one who turned down this offer, calling it a betrayal of who they were as a people. Rashek could have just made him one anyway, but in a moment of anger, he tried to destroy Kwaan—which he couldn't do, not with Preservation's power. As the other Feruchemists changed, Kwaan remained the same. Rashek eventually hunted him down and killed him.

Yes, as has been pointed out:

A powerful peace swelled in Elend. His Allomancy flared bright, though he knew the metals inside of him should have burned away. Only atium remained, and the strange power did not—could not—give him this metal. But it didn’t matter. For a moment, he was embraced by something greater. He looked up, toward the sun. (From the text.)

As a note here, the powers granted by all of the metals—even the two divine ones—are not themselves of either Shard. They are simply tools. And so, it's possible that one COULD have found a way to reproduce an ability like atium's while using Preservation's power, but it wouldn't be as natural or as easy as using Preservation to fuel Allomancy.

The means of getting powers—Ruin stealing, Preservation gifting—are related to the Shards, but not the powers themselves.

Shards and Shard intents: Holding a Shard is a contest of willpower against the Shard that, over time, is very hard to resist.

Shards affect you over time, but your mind will not leave a permanent effect on the Shard. A holder's personality, however, does get to filter the Shard's intent, so to speak. However, if that holder no longer held that Shard, the Shard will not continue to be filtered by that person.

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Question

But I think it’s commonly accepted that Ruin was sort of manipulating some…Totally taking the Spook example off the table, I’m just saying, someone by accident stab - whoops! stab - whoops! and have a power?

Brandon Sanderson

Again, Ruin was involved in that. Every spike that you saw had Ruin’s intent behind it. I’m not going to answer your question, RAFO. You tried, you got me to admit that I was trying to wiggle around it, and I’ll tell you, today I wiggled around one question that none of you saw me wiggle around, really well, today. Today. I’m not going to tell you which one it is but there is one here that you all thought, you’re all like “woo!” but you didn’t realize you’d given me so much wiggle room.

Question

So about that space station.

Brandon Sanderson

It’s not that one.

Djarskublar

So say you go to Roshar and you give somebody a Hemalurgic spike for some Allomantic power, don't care what, and you use it to become a savant. Does that qualify them as 'broken' enough to become a Radiant? As long as they are also following the Ideals to attract a spren.

Brandon Sanderson

So becoming a Radiant is a spectrum of terminologies. It... probably, but you would have to find a Radiant who would, or a spren who would be willing to touch that, okay? It's going to drive them back.

Djarskublar

So would it also affect your probability of becoming an Elantrian?

Brandon Sanderson

Yeah it would affect your ability to become anything else, yes.

Djarskublar

Okay, so would it be a positive effect, negative effect...? Because I was like, it gives you cracks in your Spiritweb.

Brandon Sanderson

It does give you cracks in your Spiritweb.

Djarskublar

So it's easier for Investiture to get in. Does it make it easier for other Investitures to get in?

Brandon Sanderson

It would make it... yes. It's going to drive spren away. So what it's really going to make easier for, there, is spren and Investiture that doesn't care.

Djarskublar

Okay, so Investiture doesn't care but spren do.

Brandon Sanderson

Investiture might care depending on if it's part of a Shard-- if it has intent and things like this.

Djarskublar

So it might let Stormlight in easier than a Breath, type thing.

Brandon Sanderson

I'm saying it might let Odium in easier than Syl. Because Syl would care, and Odium would not care.

Djarskublar

Okay cool.

Brandon Sanderson

Alright, so it could be a really bad thing, is what I'm trying to say to you.

Djarskublar

Yeah that's cool. I just want to know more about gold too. Gold Allomancy too. Because Miles was doing some funky stuff.

Brandon Sanderson

Miles was doing some funky stuff.