Invocation

Some of it comes from Words of Brandon (WOBs) that can be found on the Arcanum (https://wob.coppermind.net/ or the second-to-last link at the top of the site). Be advised that there are spoilers for the entire rest of the cosmere and every other Sanderson book in there. Some of the other details are things based around guesses to fill in the blanks of things happening in and around other cosmere books/planets. And I'm sure some of it has come through pure exposure to theories and guesses here.

I'm just imagining sticking a charged spike in a jello cup.

Fair enough

I don't know, Cultivation seems fairly sane. And I'm pretty sure the dead ones are mentally stable again

You should read the Cradle series by Will Wight (and his two other series, Elder Empire and Traveler's Gate). Also, Iron Prince by Bruce O'Connor and Luke Chmilenko is pretty good. I hear the Licanius Trilogy is good, but I can't personally vouch for that or not. The Art of the Adept series by Michael G. Manning is also decent. If you haven't hit Kingkiller Chronicles and don't mind the fact that it's probably never going to get its third book, it's decent. John Bierce's Mage Errant series is pretty good. The Demonata series is a neat series of quick adventures if you don't mind things being a little gory and dark. I hear good things about the Malazan series, but I haven't gotten there yet on my reading list.

Just don't look in your closet or you'll find the hungry hordes of Hemalurgists hiding.

Imagine that travel poster. Come to Roshar! We've got two and a half perpetual hurricanes, more insane deities than we know what to do with, and were forced to develop therapy to deal with the ramifications of these things! It's a fun place, we promise.

That sounds like a quick way to have Tanngrisnir and Tanngnjostr (I hope I spelled those right!) canon on Scadrial.

Sounds like Gartic Phone. Fun game, fun concept.

No, I just like joking that since spren can be mini therapists for their Radiants (and vice versa), therapy is one of the things Roshar could export in the space age.

Singers are living ham radio sets, confirmed.

I would totally believe there's a parallel there. They both just need the right kind of treatment. Maybe this is how Roshar becomes the cosmere planet famous for therapy.

I tend to imagine them with Polish accents, honestly. It just seemed right.

Probably a similar thing determines that as determines what the blood type of soulcast blood is.

Right at the end of BoM, when Wax realizes the "coin" beggarHoid chucked him was a coppermind, the memory had Kelsier extending his hand and it showing the scars, which, knowing that Rashek had no scars like that, clued most of us in somewhat. Then, somewhere in Secret History, there's something about nailing a Shadow back into a body. That kind of sealed the deal. Since then there have been several confirmations from Brandon that it is Kelsier as the final nail in that coffin, including this one:

I don't know that it would kill it. Trap it though... yeah probably that.

I love Tiny Wayne.

How did I miss this happening? Where did it come from?

Yeah, neutralizing Investiture obliterates the Connection that comes with it, but that wouldn't be useful for getting Stormlight off-world. You'd just blow yourself up.

True enough, but I'll be honest. I don't even know what y'all are going back and forth on here, I just saw a question I could answer and figured I might as well go for it haha.

In one of the broadsheet stories in SoS.

I feel like I didn't phrase it right in my initial thing, so that's my bad. I'm picturing anti-Connection as blank Connection, not so much a Connection-annihilator. Just something that mixes with existing Connection and waters it down until it's neutral again and ready to be shaped into Connecting to specific things. And that's somethin already established in the cosmere: Scadrian language medallions.

Allomancy and Hemalurgy also work on Roshar, including with Rosharan metals. The thing with Stormlight, spren, and the Heralds is a Connection issue, since it's Honor's Investiture that's been laid down deeply on Roshar, whereas the Metallic Arts use the metals basically as keys to access the Investiture, so the molecular structure of the metal is all that's important. Also Stormlight being actively consumed by the Radiant while also being unique to Roshar probably plays into it some. To break Stormlight free of the Rosharan system would require some serious work. With RoW's revelation of anti-Investiture comes the idea of anti-Connection, and that might work, but it also may not be possible and/or have some really funky side effects. Other solutions could be a willing change on the part of someone who glues Honor back together and Ascends, if they know to do that. Or some other form of Connection manipulation to make the Stormlight and the spren less inherently tied to Roshar and tied more closely to something portable that would be carried around. Could make the spren's Connection to the Radiant greater than their tie to Roshar to ensure they'd be able to stay paired off-world, though that probably has some side effects for both parties, but making a perfect gemstone an anchor for a ton of Stormlight would probably go better as long as wherever it's going has someone who can undo that change. Lift may also be able to generate her Lifelight off-world since it's a direct metabolic function, which may be the most reliable method to prevent off-world Radiants from running out, but doesn't solve their spren's issue. (Can spren get Old-Magic'd from the Nightwatcher?) Actually now that I'm thinking about it, you could probably shenanigan someone from Scadrial with access to Chromium abilities to transfer Investiture. It would take some doing, but it could probably be done.

My money is on that being Invention, from how hard to contact they seem to be.

If Trell is not proceeding like they've been discovered, they're a fool, and I don't think any Shard crafty enough to lay down plans like that is that particular brand of fool.