Underwater_Worldhopper

One of the first things I thought of when HoA said that Ruin preferred not to kill Mistborn because the rest of their abilities got wasted was "What if you spike them twice at the same time?". I had assumed that, like everything, the answer would come eventually, if not in the text then at least in WoBs, and once I couldn't find the answer in there, I assumed I'd see it discussed on the Shard, which to my knowledge it hasn't been. There's no chance I'm the only one who thought of this, but I can't find any mentions of it anywhere. What happens if you spike someone simultaneously with two spikes, aiming to get two different powers? Say two very skilled Hemalurgists get their hands on a Twinborn who has A-Steel and F-Cadmium. For the sake of argument, let's assume that the stealing bind point for F-Cadmium is in the abdomen. If, completely and supernaturally in sync, the two Hemalurgists pound spikes through the Twinborn, looking to steal both powers, can they actually get both powers, or will only one be stolen at random? Or, will they disrupt each other and no power will be gained at all? If you can steal more than one power this way, how many powers could you reasonably steal from a Mistborn or Full Feruchemist? 1 from each quadrant? And again, I have trouble believing I'm the only person who's thought of this, so if you know of any other threads discussing this, I'd love to see them.

I believe it doesnt necessary expand the mind, just enhances it in some way, although expanding was what Atium-Electrum (and theoretically Electrum) do. Expanding vs Enhancing is mostly a semantic difference, but enhancing is much more broad in its implications than expanding, which is specifically about increasing your quality/speed/breadth of thought. Also, Electrum can indeed grant you a vision of the SR. You'll never mange it through burning or Savantism alone though, you'll need to have ingested obscene amounts of it and then have a Nicroburst to Hyper-Flare it. Fingers crossed! They don't have much magical synergy, but A-Electrum is pretty combat-oriented, and augmenting it with F-Cadmium or F-Iron could make for as potent a Twinborn at melee as you can get without Pewter

It's something anyone should be able to do with practice. It has less to do with how well you can burn Electrum and more about how well you can interpret and glean information from Electrum Shadows, which is a learned ability separate from how well you can burn it. Obviously, being able to better burn Electrum will push how far forward into the future you can see, and so being able to burn Electrum better will enable you to anticipate things further in advance, but while it boosts the ability, it isn't necessary to be able to get information from the Shadows. Non-center Ironpulling/Steelpushing is difficult because Pushing and Pulling from the center of self is a feature of the ability, you need to be very skilled (which almost certainly requires you to have your soul warped by the power) and know what to do and how to do it. For Electrum, it's something you yourself are doing separate from the ability itself, so it isn't nearly so hard, you just need to know what to do and practice. Does that make sense? Depending on how it works, there are all sorts of uses.

Fateweight is an amazing name. And A-Electrum can be extremely useful for a Twinborn, since you can train yourself to use it extremely effectively in combat. Augmented by Cadmium or Iron, this would make an extremely good mercenary or martial artist. Large stores of breath can be used to achieve oxygen doping, which will basically give you A-Petwer-esque unlimited stamina (until your breath runs out, that is), which is a huge advantage in a fight. You essentially get a tireless, unhittable opponent, which is gonna be a nightmare to beat, if you even can. Replace F-Cadmium with F-Iron, and you get more martial artist than you do mercenary. With the proper training in certain martial arts, you can learn to use momentum and the force of your body falling rather than just exerted force to deal damage. Any Skimmer can do this and become effective in hand-to-hand combat. But pair that with an accomplished Electrum Misting, and you're once again left with a formidable opponent.

How exactly does the Dor being shoved into the Physical Realm function? Is it all of DnD's Investiture, or just most of it? When any of the Selish Arts (or other Arts being powered by the Dor) use the Dor, does it return to the masses of Dor that are stuck in the Selish Subastral, or do they return to the Spiritual Realm like Investiture normally does? Could the use of Selish Arts eventually return all of DnD's Investiture to the SR (even if it takes an extremely long time), or has it somehow been permanently grounded in the CR? Do AonDor Fabrials like the Light and Travel Plates continually return Investiture to the SR when active? Does Elantris itself (the massive Aon Rao) do that on a massive scale?

I considered it, but just in case.

Hi! Welcome to the Shard! Please try to avoid replying to threads older than 6 months, as that is technically against site rules. Now that the post's been revived anyway, I might as well add that there is a necessary waiting time between dropping and creating a bubble. You cannot drop and then create a bubble nearly that quickly. Wax does what he does by first shooting a bullet through the bubble, waiting and watching to see what direction it gets refracted in, then has Wayne drop the bubble and shoots another bullet so that it hits the first one in a way that causes it to ricochet and hit Tarson.

That's a possibility, but the books take precedent over the WoBs, so it could just be that Brandon considered it, decided he would allow for unconventional area of effect effects, then forgotten about it and thought he hadn't. When the books and WoBs conflict, generally the books take precedent.

Random ketek about Taln's time in Braize. The second half is a bit unclear in what it means, but it's Taln becoming increasingly insane (and Odium's forces becoming increasingly frustrated with him) and no longer knowing what he is there for, and not recognizing in his torment that he's slipping into insanity. Oathbound, I scream. Torturous, Odious forces torment me. Insanity weeping. Insane? Me? Tormenting forces, Odious, torturous, scream. Me? Oathbound?

There is that, too. In that case, I think that if the power can viably be used as an area of effect, it will do so, but if it doesn't (like A-Tin, A-Gold, A-Electrum, A-Bronze, A-Pewter A-Duralumin (as the WoB says) and all of the Feruchemy powers) it will affect only the person touching the Primer Cube. You could theoretically find ways to create an area of effect for all of the powers, if you think hard enough, so everyone sees a Gold Shadow, everyone seems like they're burning Tin, etc.

Only Primer Cubes charged with Cadmium, Copper, and Bendalloy create bubbles. The rest will only work on the person who's holding them. Charge it with Aluminum and it'll wipe your reserves, not in an area around the Cube. Charge it with Chromium and you can wipe other people you touch's reserves. Zinc and you can Riot emotions, Brass and you can dampen them. Bronze and you can Seek, Gold and you'll see a Gold Shadow. There was a WoB that says this, but I can't find it Edit: Found it, and though it's a little more self-contradictory than I thought, it does say that only powers with bubbles will cause bubbles. So as it stands currently, they only affect the person who's holding the Cube, but they will eventually be developed into something that can cause Area of Effect effects for forms of Allomancy that don't usually do that.

I don't know if the bones will grant any supernatural strength; in Koloss, their power and other defining features come from their mangled Spiritweb. However, their bones are probably larger and denser, so you could get more durable bones that way, but I don't see how that would be any more advantageous than custom-made metal bones. However, you could use Dakhor monk bones instead, ones with the right symbols on them. They'd either only work on Sel or require purified Dor, but it should work, along with other benefits.

I guess it mostly depends on perspective. Science and fiction have both been passions of mine for a long time, and they come together in the Cosmere and other BS books. I've only been on the forums since late April, but I enjoy theorizing and discussing the specifics of things on here a lot. I check the Shard nearly every day, and when there aren't any threads I'm interested in, I start combing through old ones. There are just so many unexpected gems you can uncover about the worlds in these books just by discussing them with other people. Something in the text you missed, a WoB you'd never seen before, ideas you'd never think to come up with, it's captivating for me. Writing and worldbuilding are just as much an art as painting is, even more so if one considers that in writing you have to deal with ideas and concepts you yourself make up, and then must relay accurately to people you can never know in places you will never see, in languages you don't speak. It deserves to be talked about in detail, if just to expose just how much thought and effort goes into the books. I realize that when it gets more technical it may not be the most accessible thing in the world, but you can always ask for clarification or simplification if you're interested but don't quite understand. As for things getting hotly debated, I'm not so worried. It may get intense, but in my experience, they rarely ever become mean-spirited or in poor taste. You have to remember that because it's all words and no tone or expression is conveyed, sometimes you might read something and misinterpret what is trying to be communicated, or assume that someone has said something in a more negative way than what they intended. I acknowledge that sometimes people genuinely get offended or upset (like there was a thread on the Mistborn forum roughly 2 weeks back where two otherwise lovely Sharders got upset with each other), but there are moderators and other Sharders who can mediate or step in to calm the situation down if that happens. More likely you'll get frustrated people than actually upset ones, but it always gets resolved in the end. I wouldn't worry about it, people tend to always pull through in the end, and when they don't, there are always other people around to help.

I will admit that Aethers in this incarnation are a bit underwhelming, but that's mostly because there are dramatic things they could probably do that we haven't considered. Remember when Tress lifts a whole ship up into the air to protect it from the rain? Imagine a Verdant Aetherbound with Dor, creating massive vines that grab and immobilize people, then worm their way in through their mouths and noses and suffocate them from the inside. Or a Crimson Aetherbound creating red spines and using them like throwing knives, or creating giant lances of red spines to impale someone from a hundred feet away. Or a Sunlight Aetherbound glowing more radiantly than any Knight, producing so much heat they eviscerate everything and everyone in their surroundings. A Zephyr Aetherbound creating bursts of wind that move at speeds so fast they send people sprawling, or flying by propelling themselves upward with an unbroken torrent of air. A Midnight Aetherbound becoming a mini Re-Shephir, creating shapeshifting monsters of black sludge. Even Roseite itself is quite versatile. If Prasanva wasn't focused on escaping but rather killing, could he have trapped enemy soldiers between two walls of Roseite, then caused it to either grow or move and crush the people inside? There are more showy applications the Aethers get when they have access to the Dpr.

I don't mean to say that the golem is beyond a Compounder Aetherbounds abilities, just that it would be far harder to do and maintain without the speed and efficacy of Unkeyed Investiture. That said, it might not be possible for an Aether to cross a Speed bubble's border. The border tampers with almost all Investiture. It absorbs extra momentum you gain by moving faster in comparison to things outside, you can't Push and Pull metals that are outside while you are inside, etc. Some applications work, like Emotional Allomancy, but those are an exception. Aethers become overpowered when you have this multi-purpose material that you can use while in sped-up time, and since you don't generally use Aether in a way that it could be deflected when leaving the bubble, the easiest way to neutralize it would be to make it be unable to exit the bubble at all. This is just speculation though. I don't know if lining yourself with it will do much unless you layer it on quite thick, and you'd need to constantly feed it water, although that's removed from the equation if you're a Bendalloy Compounder. It would work for Shardblades, though. The current consensus on the other thread is that Roseite is Invested enough to resist a Shardblade at least once before it shatters, so you could use it for the element of surprise. But that's outside the body, on the skin. I don't know whether creating Roseite inside your body is possible, but it would damage your body quite spectacularly in a large variety of ways if you did, depending on where and how exactly you do it.

He knows that Atium is being produced, so wouldn't Marsh not give anything away?

That's a good point. Once metal detectors become a thing, there's no need to go for something like a DNA test, which is a point for them being able to have children, should Brandon decide to let them copy humans on a genetic level. What happens if two Kandra mimic humans (or any other animal, for that matter) and try to reproduce? What if a Kandra mimics an animal that reproduces asexually and tries to reproduce that way instead?

That's a good idea, but I don't think this is viable for dramatic feats like the golem. The seems to be a fixed rate of maximum growth you can get from water, and the expenditure of said water is most probably proportional. Compounding water would remove the hassle of carrying around water and make it so that an artherbound doesn't even need to worry about managing their water levels beyond tapping at a fixed rate while they create Aethers, but tapping it beyond the amount the Aether actually uses isn't going to help you grow Aethers any faster. It would enter your body and bloat you up, make your blood thinner, and all sorts of other nasty side effects of water intoxication, though I doubt it would be fatal because of the nature of Feruchemy. I'm pretty sure it was covered on one of the other Aether posts, but Bendalloy Compounding won't help you be any more efficient with your water or boost your rate of growth. You could use it keep unholy amounts of water on you, and it could help you form more Aether in the long run, but something like creating the golem might be beyond your ability to create with water. It might be easier to do it with F-Bendalloy, but still harder than with unkeyed Investiture. Kelsier may not have gotten Prasanva a Bendalloymind Medallion because one doesn't exist. Medallions only seem to be able to only tap or only store an attribute, we have yet to see one which can do both. Not only that, but it seems like the SoScads can't create Allomantic Medallions, or even roughly half of the 16 Feruchemical ones. And I doubt Dor will any work better for a Bendalloy Compounder Aetherbound than it would for a regular one since it's utilising the Invesiture itself and not using it to boost water usage. However, if Aetherbound can become Savants, then a Bendalloy Compounder Aetherbound would most likely be able to achieve it first or more strongly, they could probably do more with the Dor than a regualr Aetherbound could.

I don't think it would heal it. Lifeless take a single Breath to create; that's not a lot of Investiture, especially for Soul-Healing purposes. I doubt it would heal the limb the traditional way. I see what you mean about the Connection that it forms, but that's too slight for "healing" the limb in this roundabout way too. I could see it maybe happening over time if you use a very complex and specific Command alongside a mind-bogglingly complex visualization, where it allows you to use the limb in some capacity and the Breath slowly grafts onto your Spiritweb, allowing for more direct control. But that's only if you yourself Awaken the limb, and there's evidence that that may not be possible. My question was posed more as to whether or not it would be possible to create a living Lifeless servant this way by Shard-killing and Awakening their limbs, healing the limb in any way had not been what I had in mind, though I could see it being possible if certain conditions are met. I didn't realise this was such a popular topic

Something I thought of recently. If I use a Shardblade and Spiritually kill someone's arm with it, could I Awaken the arm as a Lifeless that works as a separate entity from the person it's attached to? It seems implausible at first glance, but bear with me. The portion of your soul that correlates to your arm get excised, so your arm would not be soulless, disconnected from your mind, and you cannot use it. It is unInvested now, so you should be able to Awaken it. Being soulless is not the same as actually dying, so no necrosis or anything is happening to the arm. It's still getting blood flow and through that, an oxygen supply, and it has all the genetic data it needs to continue to sustain itself, so no maintenance or ichor-alcohol will be needed since the subject never died. So could you do it? If you used a Shardblade to kill all four limbs and Awakened them all, could you essentially control a person that way by coding their limbs to work together (I assume they'll count as individual Lifeless) in accordance with what you order them to?

Right, exactly. If Radiant Spren aren't being used, the Stormfather's lack of a reaction makes sense. But I doubt it's just the Investiture. If that were the case, any Fabrial would be entirely resistant to Shardblades because they're Investing them, which clearly isn't the case. You could make the argument that it's only Radiant Platespren that are sufficiently Invested enough for resistance, yet while Windspren are considered to be among the larger Spren, other Platespren like Creationspren, Gloryspren, and Logicspren aren't described as anything notable. Logicspren are used to make Fabrial clocks, which should by principle be more Investiture-Dense than some segments of Shardplate. If it was just Investiture, a Fabrial Clock would be immune to Shardblades too. The fact that Fabrials require Wirecages, the fact that Half-Shards are Augmenter Fabrials, and the fact that other Fabrials made of Platespren don't become Blade-resistant all suggest pretty clearly that Investiture isn't the main factor in making Half-Shards immune. Why exactly would the Wirecage be more likely to be damaged? It shouldn't, not necessarily, if they cushion it right. Either way, if the Wirecage gets damaged, it obviously wouldn't work. The idea is theoretical, it's meant to only apply if the Fabrial itself survives. Here's the full quote: It doesn't say that the diamond shape is required, only that they haven't been able to create anything else that is Blade-Resistant. The diamond shape is more likely a result of what shape covers the most area without becoming too heavy to maneuver and reasonably use. The shape probably doesn't matter, so long as the mass remains the same, if that even is a factor in the Fabrial working in the first place. It may be simple, but that doesn't mean it's true. It's a possibility with nothing to back it but Occam's razor, and even that won't support your answer if a more reasonable explanation comes along. It's speculation at best, conjecture at worst. It's a valid explanation, but it's far from the only one. Without any evidence to back you up other than a principle of theory that's usually reserved for philosophy, you shouldn't be pushing for one specific answer so strongly. It's fine as a headcanon, but it's only one of a multitude of possibilities, since we know next to nothing about the mechanism of Half-Shards. And which I agreed to way earlier. Did you miss it? Short trips yes, but how short would a trip have to be before it can no longer reasonably store so much weight continuously? It isn't, that's what confuses me. I do most of my reading online, and I've come across some books that have the wording a little switched up, but this is the first time I've encountered it in a Brandon Sanderson book. Per Alder, that would be ~30 pieces at least for the limbs alone. If the book is omitting so many Windspren, it could just as easily be the case that multiple Spren can come together to form a single segment, since the prime evidence against multiple Spren coming together was the number that we see actually form the Shardplate. If that number is apparently so high that more than twice the amount of Spren mentioned are actually present as a low estimate just for the limbs alone, then there could just as easily be a lot of Windspren that come together to form larger sections. And you yourself said that it was possible that the Windsprens' Investiture could feasibly comingle, which is another point in that theory's favor. I don't see where you're drawing the conclusion that "clearly single section is not dozens of spren" from when it was just established that the number of Spren we see is inaccurate. But in the next line, you go against your original statement, saying "The shattered pieces of metal are almost certainly coming from just a few spren". Am I missing something, or are you agreeing that more than one Spren compose a single piece of Shardplate? You say that individual shards cannot be just one Spren, which also seems like you're agreeing with the theory, so now I'm just lost about where you stand on this. No, I'm sure we've only ever seen diamond-shaped Half-Shards. Again, this is conjecture. They may have decided upon the diamond shape for practicality purposes, or for standardization. We don't know the mechanism that Half-Shards work on, so we don't know what problem they're running into with Half-Shard armor. If it was Investiture alone, it wouldn't be hard to fit it onto armor. Why does the shape of metal suddenly become a factor here when it isn't for any other Fabrial? There are a lot of inconsistencies between how this model of the Half-Shard works and how other regular Fabrials that we know of work. Kaladin is just naturally good with a spear, he has a knack for it. It's exaggerated for narrative purposes, but it's not so unbelievable. People are just naturally good at certain things sometimes, especially if they have a passion and longing for it as Kaladin does. And it's not like he doesn't get any training at all, he gets several years of it. Shallan's talents are more supernatural, but they still make sense within the context of the Cosmere. When she takes Memories of something, she Connects herself to something, just a little, and then uses that to reproduce the scene on-page, whereupon she loses the Connection. It's a Resonance of being a Lightweaver. Just because something is beyond her physical senses doesn't mean it is beyond Connection and her application of it. And what Dalinar does can also be rationalized. He can already touch the Spiritual Realm, depending on your interpretation of the Cosmere he is either Connecting Kaladin to Tien's actual soul, or he's using the Spiritual Realm to peek into an alternate timeline that could have happened where Tien never died and Connecting Kaladin to that. Here's the WoB: Anyway, even when something in the canon is primarily driven by plot and narrative reasons, there are still in-world rationalizations for how that happened. Stating that a plot device happened because it's a plot device is redundant. You could say that about anything. How do Half-Shards work? Doesn't matter, they work how they work with no need for internal consistency because they have to for the plot to work. Will Roseite shatter if it's hit by a Shardblade? Doesn't matter, it either will or it won't, and when it does it will be purely because the plot desires it and no other explanation is necessary. Do you see what I mean? Why theorize on these things if the answer is ultimately going to be "It's a plot device"? If you don't have a valid response, you can always just say so. So either Spren of the exact size needed to form each specific segment are just the ones that happen to form Shardplate around Kaladin, or there's some way they can coordinate their Investiture. I did like your original response of the Investiture comingling. @Duxredux It most likely does not. It would count as Invested material, but not alive. It's less about Pasanva and more about an Aetherbound in general, and particularly the properties of Roseite. Could be, but the different Shards of different Orders are separate Alloys, which is enough for their properties to drift and for them to be considered different metals entirely. It is unlikely that all of them share that exact same property in this way. However, that's a good point about the Radiant Platespren. It could be possible that the Augmenter Fabrials in Half-Shards are forcing a Spren to manifest physically, but that's unlikely for some reasons: A single Platespren would not be enough to manifest a whole shield big enough to cover your entire side. You could get around this but using multiple Spren, but the descriptions of Half-Shards only mention a single gemstone. This method would mean that the Shields are made of God Metal, yet the metal they are made of is never described in any way as to hint that this is the case, and they don't burst into liquid metal as regular Plate does when they break, which this would be a form of. Having the Spren manifest physically would require them to actually be outside the Polestone, at which point they wouldn't be affected by the Fabrial's compelling and could just escape. I like this idea, but I don't think this is quite right either. Physically resisting other God metals is specifically a Bavadinium thing. Alternatively, differing Intent would not work here either, since all Shards (Blades and Plates) are made of the same two Shardic (Shard of Adonalsium) Intents. You could argue that the amalgamation of differing ratios of the two Investitures are enough to make them count as separate Intents, but then Blades shouldn't damage Plate of the same Order. Identity could work here, but the more animalistic Lesser Spren may not have enough of an Identity for it to irritate each other, and even if they do, Identity has not been shown to react aggressively in any other case. besides, Shardblades should by this rule also damage each other, but they do not. For Kelsier, the "breaking" of the power may just be flavour text. Still, that would essentially be synthetic Plate, which is exactly the thing people have been wanting to figure out for centuries. You list possible disadvantages of non-Plate Blade-resistant armor, but it would still be an enormous breakthrough. Chinks in the armor and the lack of extra speed and dexterity just aren't big enough disadvantages for this to not be immediately implemented and made famous. There isn't any reason to believe in this scenario that the armor would be heavier than any other regular heavy infantry armor, which we see that the Alethi employ regularly, so that just isn't a problem. And actual Shardplate wearers are vulnerable to to well-aimed spear attacks too; That's how Kaladin kills one. Still not a reason to not implement them.

True, but even if it is just a form of Investing it enough to resist a Shardblade, I still think that it's suspicious that the Stormfather doesn't say anything at all about trapped Radiant Spren when he was grumbling just a few lines earlier. Either he already knows how Half-Shards work and realizes that Taravangian is lying, or he for some reason doesn't care that Radiant Spren are being trapped (and possibly killed), which is highly unlikely. The thing is, I would have assumed the Stormfather doesn't know how Half-Shards work, yet he doesn't at all have any reaction to what Taravangian says, despite the way Taravangian talks about the Spren being trapped making it sound like they're Honorspren (it could also be Peakspren, the Stoneward Radiant Spren that grant access to Tension). This means he either knew already that this is not the case, or that he does not care, although I can't fathom why. Oh I doubt it's just any Augmenter. It'd be highly specialized and complicated. But what confuses me is that a Fabrial Wirecage is never described on a Half-Shard, only that there's a metal box with a gemstone inside. But if the Shield isn't part of the Fabrial, any part of it that's left still attached to the Fabrial would remain acting like a Half-Shard until that's attacked too. The shattering is probably just an effect of the Blade and not the Half-Shard itself. And we don't know what the mechanism of the Half-Shard is, it could just as easily be Augmenting Spiritual Durability instead. That could be why it shatters after two hits; the Spiritual Aspect's been damaged enough that it doesn't stay as one piece anymore. Like I said just above, it could be Augmenting something Spiritual instead of something physical. Could be, an Iron block would weigh far less and so you could fill it perpetually for quite a while in relatively small Ironminds, but I think that's too much extra hassle. It could be that filling a Metalmind scales, so one arbitrary unit of Wax's weight would be far less than one stored unit of a Ship's weight. I mean to say that if both Wax and a Ship were storing at maximum capacity into identical Ironminds, both would take exactly the same time to fill one completely, but the Investiture in the Ship's Metalmind might carry more weight in it. If you unkeyed the Ship's weight and gave it to Wax and he tapped it at a regular rate, he would become far heavier than he would by tapping at the same rate from one of his own Ironminds. It would solve this problem since they wouldn't need a lot of Iron, but it's only speculation, and unlikely at that. Huh. Mine says "Dozens of others". We'll go with the actual book, because mine's an Epub and I trust the actual books over an online version. But the thing is, if there really are as many individual segments as Alder is saying, you'd need a lot more Spren to form individual segments. If we accept that the number given may be inaccurate, then there's nothing against the idea that multiple Spren could form a single segment either. They could be made mostly of Individual Spren, but their Investiture could congeal for the smaller segments, and multiple Spren could work together to form the larger pieces. Can you quote that? I don't remember it being mentioned. It could then just be an Augmenter in a way that we haven't been explicitly told about, since as you say, the AAs have been a tad limited at times. That's a strong point, but I won't assume it's impossible until I see that quote. If it does indeed Augment a Spiritual quality, it might only work on a sufficiently large Shield, maybe because it's Augmenting a Spiritual sense of protection, although why that wouldn't work on a Breastplate is beyond me. It probably has to do with size. Some Spren are larger than others, but then each segment would need a Spren that just happens to have exactly the right amount of Investiture to form it, which is a stretch. I'm far more inclined to the idea of the Investiture comingling once the Plate is complete, but then it circles back to the idea that multiple Spren could form a single section together, since their Investiture can apparently comingle anyway.

Reaction time increase seems like a perfect resonance for this one. This one could make a great Night shift Allomancy SWAT team member. Name could possibly be Nightburst, or Shadeburster. Something along those lines. This is one of the most dangerous Twinborn Combos simply because they could reverse compound that strength and become insanely powerful without ever needing to slow down or have to deal with extra heft. It isn't obvious that you're tapping at all, you could walk up to someone, tap a bunch from your Pewtermind without them knowing, and punch their head off in under a second. Not only that, burning Pewter doubles your strength while burning, and triples it while flaring. What about when you burn Pewter while you're taping strength? Does all that muscle mass' strength get doubled? Tripled? If you did this while tapping all your stored strength (remember this Twinborn can Compound strentgh too, so that's a LOT of attribute) at once, could you become so powerful you could punch through several meters of concrete with a single blow? The resonance would probably be extra strength drawn from burning Pewter, maybe even visibly increasing muscle mass a bit, which has something of a compound effect since you would now have a little bit of extra muscle that can be enhanced through burning Pewter, so just a tiny amount of added muscle could make you a lot stronger, comparatively. I doubt this ability will stack too much, but it would be pretty nice, and give you an edge over other Pewterarms. What would the name be? Musclemaster seems a bit cheesy, but I can't think of anything better.

What do you mean by turning them into full-blown Shardblades? Edit: @Lightweaver2 Invested Aluminum won't do anything as it's already as immune as it's going to get, and it hasn't been canonised yet whether or not the Aluminum actually holds a charge as opposed to acting like an Identity sink.

It could be a requirement of the way it works; maybe the same Fabrial attached to a wooden shield wouldn't be able to withstand a Shardblade. Fair, but then how does the entire Breastplate break at once in some instances? Fair, I could see that many different sections taking one Spren each. But some segments are bigger than others, so can only certain Spren become certain segments, or are some segments of Plate just more Investiture-Dense than others?