Underwater_Worldhopper

That is a very terrifying and highly compelling theory I hadn't considered before. I doubt that this is where Brandon is heading, but I would very much love to read a version of the series where this happens. Szeth-Honor and Vargo-Odium is such a dramatic way to end the series, perhaps not as dramatic as Fused Dalinar and a Deadeyed Stormfather, but still very intriguing and mildly horrifying, since they both seem to be the absolute worst candidates to be given Shards in terms of the safety of the inhabitants of the Cosmere

I saw the title of this thread, realised Kaladin still doesnt have a romantic interest, and thought this thread was going in a very different direction

I really don't think that you'd need to inject a proportional amount of Investiture into the Stamp to make yourself younger this way; I actually think it's actually a really ingenious way to do this. You don't need to substitute the Investiture into your soul, because you're not trying to give yourself any powers here like you would to become an Allomancer, not any more than a regular Essence Mark. Say you're 20 and are friends with a group of Pulser Savants who decide they really really want to time travel 40 years into the future in what will be only a couple hours for them, and they invite you. You decline, but then 40 years down the line, you want to go back to being 20. You stamp yourself so that you said yes, and voila, you will have become younger. The only thing your Essence mark will change is where you were for a couple of hours 40 years ago, and it will completely rewire your Connection to your age. Changing age was hard for the Lord Ruler because he was constantly fighting against what his soul was trying to force on him. With an Essence mark, you can change that Connection no problem, and it wouldn't be any harder than any other regular Essence mark, probably even easier. It all comes down to plausibilty. If you had that opportunity, I think it's 100% possible, and probably even easy. If you didn't and you needed to Forge the circumstances under which you were in a Cadmium Bubble too, then it could become much more difficult, and potentially even requiring an injection of Investiture.

I don't think this sort of immortality would be reverted by the Soul at all, not even gradually. A cut off arm won't heal back under any circumstances unless extra Investiture is introduced, even though it doesn't match soul. The Lord Ruler reverts because Investiture is being applied to him to make his body look young; as soon as that stops, his body goes back to how it actually is, which his soul is keeping track of. Same reason why your body doesn't keep the extra mass from F-Pewter when you stop tapping; it was being sourced from the Investiture, and now that that Investiture isn't there, you return to normal. If your body is physically changed to be younger, then the soul wont do anything, just like how it won't do anything to grow back a severed limb or remove a scar until or unless Investiture is applied. I dont think that enough time being younger would make it safe to heal yourself, no matter what. It would always revert you to your actual age unless you manage to get so Invested your perception overrides your spiritual age.

It isn't metal, so no unless Aethers count as God Metals

That's a reasonable argument, but can you link the WoBs and sources you're basing these ideas off of?

I dont think Thanasmia is the name of the Primal Midnight Aether, but most just because the name doesn't sound very indian subcontinent-y, which we know the Aether Homeworld is based on, whereas Silajana, Suna, and Vishwadhar all are Indian-sounding. My first impression when I read that passage was that Thanasmia is a mythological or historical figure on Lumar, maybe someone who sailed the Midnight Sea successfully before, perhaps even the only person to have done so. We have real world examples of places being named after the people who discovered them or first/most famouly achieved something there, and that's what I assumed this was supposed to be on my readthrough. It could still be the Prime Midnight Aether, or at least the mother strain on the Midnight moon derived from the Prime Midnight Aether, but I find it unlikely.

I wonder if this means you could control White Sand the way you can Spores, and essentially become a Sporuter Sand Master

Is it not specified that a bullet to the head would kill a Bloodmaker that wasn't actively tapping before the injury? And I swear Wayne himself is the one who specifies that you need to be tapping beforehand to be able to survive them, though I can't be asked to look for that one right now. I don't think the body's Intent to survive is enough to tap from a Metalmind. You can't store while you're unconscious, so I don't think you could tap either, no matter how horribly you're wounded. Wax is the only real example of a non-Trellium spiked person tapping Health near death (and even that from an Unsealed Metalmind, which we know push on the boundaries of what you can unconsciously do with Metalminds), and he's unique because Harmony kept his mind around and he had to consciously choose to tap the health. A Bloodmaker Savant could maybe do it, but that's because of Savantism than anythng else.

Screw the Nicroburst Allomancer SWAT team, I want a Kandra to be the Era 3 protagonist after seeing all of these

Imagine if a Duralumin Compounder became a SA Spoilers: