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Mistborn: Secret History Explanation ()
#253 Copy

Phantine

Do the other uses for those metals [nicrosil, aluminum, duralumin] currently in the RPG also work in-universe, or are they just there for RPG mechanics?

Brandon Sanderson

Most of the things in the RPG books relating to the metals that you don't see in the books fall under the "We need to make a game out of this somehow, Brandon" clause. I've told them they can extrapolate if they want, but that I wouldn't consider their extrapolations canon.

Herowannabe

So does that mean that these metals will be getting updated rules in a future RPG supplement?

Brandon Sanderson

That's a possibility. I've said before that you should consider any games you play to be in an alternate dimension anyway, where the rules work slightly differently, and your players can control the fate of what is going on. Plus, it will be years before I can get to the nature of all this in the next trilogy, so we'll see how relevant it all is in five years or so.

/r/books AMA 2015 ()
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Oudeis16

Bronze has always been my favorite allomantic metal. Could a Seeker learn to sense familiar pulses? Could Marsh, for example, have felt the bronzepulses of pewter, and been able to tell the difference between some Thug he'd never met and his friend Ham? Or is pewter is pewter is pewter?

Brandon Sanderson

If he recognized something about the burning, it would have to be in the personal way someone was burning the metal. However, Bronze is capable of sensing other types of investiture. Expand from that as you wish.

Chris King interview ()
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Chris King

A lot of people wanted clarification on weight in regards to Pushing and Pulling, whether or not it has a direct correlation to the power or if it's just something people say because generally someone heavier is going to Push--

Brandon Sanderson

Right, right. It's more-- I mean, the whole-- If you really dig down into it, and I've talked about this before, the whole mass, weight, Push, and Pull thing gets a little tricky when--particularly when you throw Feruchemy into the mix-- Are we changing mass? Or are we changing what the power of the earth pulling upon you is, and things like this. Generally understand that most people who are talking about this are not speaking in scientific terms and they are speaking in colloquialisms.

Words of Radiance San Diego signing ()
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DefiantBurrito (paraphrased)

Can you tell me what Wit put in his drink in Shallan's flashback scene?

Brandon Sanderson (paraphrased)

It was something that you or I would probably not want to eat in our world, but that Wit got some benefit from eating...

DefiantBurrito (paraphrased)

Something we've seen in the Mistborn books, perhaps?

Brandon Sanderson (paraphrased)

[sounding pleased] Yes, perhaps like something you've seen in Mistborn.

Shadows of Self Lansing signing ()
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Questioner

I wanted to know if Forged metals had Allomantic properties.

Brandon Sanderson

If Forged metals had Allomantic properties. So what I’ve kind of been ruling on this is if you Forge a metal from one metal to another you can probably start burning it Allomantically but it--  Once you did it would disrupt the Spiritual nature of the metal and it would change back immediately.

Idaho Falls Signing ()
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PrncRny (paraphrased)

Is an Snapped Allomancer more likely to pass on the Allomantic ability than an UnSnapped one?

Brandon Sanderson (paraphrased)

Not necessarily.

PrncRny (paraphrased)

I asked if it was pure genetics, then.

Brandon Sanderson (paraphrased)

He initially said yes, then appended that with "not just genetics. there's a Spiritual aspect to it as well."

Arcanum Unbounded release party ()
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Djarskublar

So, say you have a gold/gold Twinborn and they worldhop to Roshar and they study the magic and do the whole Khriss and Nazh thing for a while so they know a lot about the magic, but they've also left themselves a lot of options with what they can do. So then they manage to pull up a gold shadow of them having actually become a Surgebinder and then kind of meld themselves with that shadow a bunch, could they change their Cognitive Identity enough so that they could, like, tap a lot of gold and grow the spren and actually be a Surgebinder?

Brandon Sanderson

Unfortunately, no. It's a good question, but no. That won't work for a couple of reasons. One of which is, simply creating Investiture is not something that can happen, right?

Djarskublar

They are a gold Twinborn, so they can tap a lot of gold...

Brandon Sanderson

They can tap a whole bunch, that's true, they can do that, but simply having it is not gonna create a spren because the spren is from a different god, right, a different Shard.

Djarskublar

So if they had Regrowth cast on them, would that do it?

Brandon Sanderson

*hems and haws for a second*

Djarskublar

A really, really big Regrowth, like in the middle of a Highstorm.

Brandon Sanderson

Hmmm, this, you are getting to the realm of plausibility at that point. I still don't think gold is the way to do it. I think you just get all that Investiture. It would become sapient by you sticking a whole bunch of Investiture in, and then you can bond to that. But it's not like people gain what you would have done. Does that make sense? That's just what's going to happen, is you're gonna, you can create a, potentially create a spren that way, but you are more likely to end up with something like Nightblood. But you could potentially create a spren, but I mean you're just gonna end up...

Djarskublar

So there are other, more optimal ways to do that?

Brandon Sanderson

Yes, go bond a spren. (evil grin of course)

Djarskublar

But you can't easily bond multiple, and if you did this you could maybe get multiple.

Brandon Sanderson

Nyeaaahhh... The spren still has to choose. If you want to be a Surgebinder, the choice is being made. You can't fake your way into it. Decision and Honor are too much a part of Surgebinding for you to be able to fake your way into that. Other magics you might be able to do that. Other magics that don't require, like... Surgebinding works because a piece of Honor or Cultivation or a mix has chosen you specifically. There is will from the actual Investiture involved in it in Roshar. So it's not something you can cheat your way into, right. But cheating your way into Breath might be easier.

Shadows of Self Lansing signing ()
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Questioner

[In Shadows of Self] there’s the new metal, I guess. I was wondering-- So if someone were to bring a metal from a different planet, say steel from Roshar, would it still be recognizable as steel on that world?

Brandon Sanderson

It would still be, yup. It would be.

Questioner

Because there was mention of it being "of Harmony" right, and that was the difference?

Brandon Sanderson

The thing you gotta remember is that the metals on Mistborn are keys and not the actual source of the power. If they were the source of the power, it wouldn’t work.

The Alloy of Law Annotations ()
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Brandon Sanderson

Marasi is an Allomancer

One of my big goals in these post-epic Mistborn books is to give a chance for more limited-power people (Mistings and their Feruchemical cousins, Ferrings) a chance to shine. In the previous trilogy, the focus really was on the Mistborn. Vin and Kelsier fit the epic fantasy mindset I wanted, powerful in an epic sort of way, broadly capable with abilities in a lot of areas.

For these books, I wanted to show people who had one or two powers, instead of sixteen, and show how specialization can achieve some incredible results. Because of that, I intentionally held back in the first trilogy in letting Vin do a few things. (Note how much better Zane was with minute steelpushes and ironpulls than she was.) Vin was incredibly skilled, but because she had so many powers to work with, she didn't home in as much on any one of them. Things like Wax's steel bubble are tricks I wanted to save for people like Wax. (He's what we’d call in the Mistborn world a steel savant, so capable with his metal—and having burned it so long, for so many years—that he's got an instinctive ability with it that lets him be very precise.)

And so we come to Marasi, who has the power opposite—but paired with—Wayne's ability. Both she and Wayne have powers I wanted to delve into. Indeed, I kind of promised that the last metals would get highlighted in these newer books. Matching that, I've given Miles the same power the Lord Ruler used to heal himself from so many incredible wounds. I wanted to explore more of what this skill was capable of when not overshadowed by so many other powers and abilities.

The Alloy of Law Annotations ()
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Brandon Sanderson

Chapter Twelve

The group investigates the railroad tracks and canal

So, let's talk about the realities of speed bubbles. I did research on this, and got different answers from people on what really should happen if you could slow time like this. One of the issues is that light doesn't change speeds based on this sort of issue, so there was discussion of what things would look like inside looking out or outside looking in. It seems likely that there'd be some sort of red shift, and also that things might grow more dim inside a speed bubble. This is all really very theoretical, however, and so, in the end, I decided that there was enough disagreement among scientists with whom I spoke that it wouldn't be glaringly irregular if I just had the shimmer at the borders and stayed away from dealing with speed of light issues.

There's a much larger issue dealing with slowed time that rarely gets addressed by this type of fiction. I considered using it, and it's this: conservation of energy. Inside the speed bubble, Wax and Wayne are moving far more quickly, and therefore have a ton of kinetic energy compared to those outside of it. And so, a coin tossed from inside the bubble going outside would suddenly move with a proportional increase in speed (proportional to how much slower things were outside).

In essence, speed bubble = railgun.

This is dangerous for narrative reasons. I've often said that the limitations of a power are more interesting than the powers themselves. (It's Sanderson’s Second Law of Magics: Limitations > Powers.) One of the reasons for removing Mistborn and Full Feruchemists from the setting was so that we could focus in on the usefulness of the individual powers in Allomancy and Feruchemy. That falls by the wayside if any of the individual powers become too strong on their own.

I didn't want Wayne to be able to slow time, then sit inside his bubble and leisurely pick off enemies one at a time. And so, I had to place strong limitations on the speed bubbles. (Much stronger limitations than on other aspects of Allomancy. Pushing and Pulling, for example, have their limitations based in solid science. With speed bubbles, I eventually decided that solid science made them way too powerful. So I had to change things.) Therefore, the rules became: No shooting/throwing things out of speed bubbles, no moving speed bubbles, and a required couple second cool-down between creating different speed bubbles. The first rule broke required objects to be deflected when leaving the bubble and that we have the bubble absorb excess kinetic energy when something leaves it.

Disappointing for the scientists, I know, but it makes for a stronger story.

The Alloy of Law Annotations ()
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Brandon Sanderson

Chapter Fifteen

Miles talks with Suit, gets two minders, then burns gold to see two versions of himself

One curiosity of dealing only with Mistings, rather than full Mistborn, was what to do with the less powerful metals. Certainly a Pewterarm or a Tineye can be useful. We've seen them in the series do plenty of interesting things.

But what about a person who can burn only gold? I think there's just one place in the entire first trilogy where someone does it, the time Vin burns it in the first book. (I may have put a second time in; I don't recall.) Gold, as a power, was placed into the schematics to give a clue as to what the Eleventh Metal was. Beyond that, I wanted some of the powers of Allomancy to be more metaphysical, more thoughtful, and less about combat.

I'd already decided that Miles would be a Gold Compounder, capable of the Lord Ruler's healing. That meant he had to be a gold Misting. What would one do, with this power? Ignore it? Was there a way to use it? His nature as a gold Misting is a large part of why Miles is such a thoughtful, introspective person. He is not a good man, but he is a self-reflecting one.

There's more going on here, of course. Pay attention to the name he mentions: Trell. This is one of the gods from the ancient religions Sazed talked about. You might think that the spikes in Miles will let Sazed influence him directly, and they would—except that Sazed has taken a complete "free will is needed" perspective on life. He won't let himself take control of people directly unless they've "given themselves" to him, as most of the kandra have at this point. Even then, he usually only nudges.

But there is something odd going on with Miles.

Arcanum Unbounded San Francisco signing ()
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Questioner

So my quick question: Can you use Identity (I love the speed bubbles!) to anchor speed bubbles to yourself?

Brandon Sanderson

Uh, this is possible. That's less a matter of Identity. What’s gonna happen there, like, the more someone uses the powers, the more familiar and intermingled with their soul the powers become, and they are able to accomplish things that others can't. This would be like a Mistborn learning to hover a coin, right, which they can do, but most think you can't. That's the sort of level we're going with.

Necarion

So a savant could?

Brandon Sanderson

A savant could totally do that. The problem is, things moving in and out of a speed bubble, there's a transference of energy. This is how we keep speed bubbles from irradiating people when light moves through them, right, red shift. And so there's a transfer of energy directly from the Spiritual Realm, which means that moving with a speed bubble, you're gonna run into that, and it's gonna be, it's gonna cause all kinds of problems, but it would be possible.

Arcanum Unbounded San Francisco signing ()
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Questioner

Now, do things actually move unpredictable at the edge [of a speed bubble] or do they refract out? Is it just that geometry is hard?

Brandon Sanderson

No, I have a level of unpredictability, I mean we're Chaos Theory. The idea being, you could predict if you had a perfect closed system and things like this, but it's unfeasible for most technology and minds to be able to predict.

Arcanum Unbounded San Francisco signing ()
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Necarion

One other speed bubble question. Is the speed of light the same inside and outside a speed bubble?

Brandon Sanderson

Um, yes. The speed of light is the same. Good question, you're trying to figure out the FTL.

Necarion

Also, it would eliminate the redshift if the speed of light…

Brandon Sanderson

If the speed of light were similar. That's one thing we considered, but it felt too unintuitive, plus it's just not how I imagined things working. So, no it is not, but that's a good question. It is something we considered.

Firefight Houston signing ()
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Questioner

What would be the Allomantic definition of "metal" as it relates to steel and iron, what shows up? Like, the metalloids, compounds, in ironsight and stuff?

Brandon Sanderson

Um, I don't know what you mean by that. What are the percentages?

Questioner

The periodic table.

Brandon Sanderson

Oh, the periodic table. On the periodic table, the difference between iron and steel? What do you mean?

Questioner

What do iron and steel define as metals? So they would show up with blue lines?

Brandon Sanderson

Oh, on the periodic table, what defines as metals? I see what you're staying. So, this is kind of free-form on my part. I have check marks on them on my periodic table, where I kinda just sat and said "Yes, no, yes, no." But things over on the side with cesium and what-not, they would, they would count. Not everything that looks like it should count does. But most everything in that little batch, next to iron and gold and everybody over there, most everybody right there will, and most everybody over on the side will, the stuff that explodes with water. So for instance, ...sodium and stuff like that, if they're in their pure form would, but it's kinda freeform, I just had to make calls. Because there's gotta be a dividing line somewhere.

Questioner

So, would ironsight in enhanced Inquisitor form, show up on atoms in compounds...

Brandon Sanderson

Oh, yeah, they totally would. That all shows up. Trace metals and things like that, they can see your blood, they can see all sorts of stuff.

Arcanum Unbounded San Francisco signing ()
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Necarion

The compounding trick that the Lord Ruler performed. When you're storing Investiture, are you storing your "Mistborn-ness" or all the powers individually?

Brandon Sanderson

All of the powers individually.

Necarion

Oh okay!

Brandon Sanderson

Yeah, the compounding trick. Really what's happening is you're fueling Feruchemy with the power of Allomancy, but you're filtering it through you, and then you're storing it.

Necarion

So it's not that you're a more powerful mistborn when you've tapped [investiture]

Brandon Sanderson

No, good question.

General Reddit 2018 ()
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DTF_20170515

Why refrigerate food when you can just stamp spoiled food so that it was stored properly before?

Aurora_Fatalis

You'll have to ask Brandon how that'd interact with gastric acid breaking down the stamp. Or how porous/loose material interacts with stamps in the first place.

Come to think of it... There's a WoB saying the Nightwatcher could change your species, but have a hard time making a spren bond to you. So... could the Nightwatcher turn you Scadrian and make you eligible for Allomantic powers? Or does the Nightwatcher's boons operate on soulstamp principles?

Hell, let's say you bought a vial of the wrong metal on your field trip to Sel. Could you pay a Forger to stamp the vial into being a vial of the right metal (it's believable that you would check before such an important trip) and then drink the metal contained in the vial to fuel your Allomancy?

Brandon Sanderson

All right, all right. Let's see... /u/Aurora_Fatalis, changing metals around with other forms of Investiture is generally going to work, according to how I view the magic right now. The power is there, you just need to align the matter the right way. So forging new metals: not too difficult. This is because Allomancy isn't actually using Investiture in the metals, but using it as a key to get power from somewhere else.

Forging a sword to be a Shardblade, however, would be very, very difficult for multiple reasons. The most obvious one is that the Investiture required would be enormous. A Shardblade is a highly-Invested object, with its own self-aware soul.

If you could overcome the initial resistance invested objects have to being influenced by other magics (something that Forgery is particularly good at doing anyway) you'd theoretically be able to change Shardblade/spren's personality like you could a person's.

Fooling the magic via Connection and Identity is not so hard, under the right circumstances, so making a Forger into an Elantrian (or an Allomancer) for a short time is plausible. Making yourself into a Radiant, however, would be more difficult--because the limitations placed on that magic have to do with persuading a sapient being you are worth the bond.

Aurora_Fatalis

How about regular food? If I stamp a pineapple pizza into a pepperoni pizza and eat it, what nutrients do I end up with?

Brandon Sanderson

The way I have it working now, I believe (though I'd have to do some double-checking, as it's been a while since I've been working on Sel) soulstamps are more fragile than things like Aons, and it would be very hard to eat something with one without breaking it. But assuming you could, you'd get nutrients from what it had become--but those would change back once the stamp broke or ran out.

It is possible to go so far down this rabbit hole, however, that the chemistry of Forging (like the physics of Allomancy) it just can't make sense any more. So be aware.

Oversleep

With things like Stamping metals for Allomancy, you have said that it'd be possible for short time, but then burning it would break the Seal and metal would revert back.

I guess it would be similar with food, right?

Brandon Sanderson

Yes, that's the big problem with Forging. Getting the stamp to stay in place once you start to change the object that has been stamped.

Mistborn: The Final Empire Annotations ()
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Brandon Sanderson

Burning metals by instinct, by the way, is something I had to add to the book for scenes like this. I had to be able to have characters be able to heal quickly–in a relative sort of way–so that I could keep the pacing where I wanted it. That meant long term, quick healing, if that makes any sense. I made it possible for an Allomancer's body to use metals–particularly pewter and tin–when they needed them.

DragonCon 2019 ()
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Questioner

If a Mistborn is Pushing and Pulling on metal at the same time, would it stay suspended in midair?

Brandon Sanderson

So most likely not. You could make it happen. Because there's no friction holding it in place, even the slightest change would zip it off in one direction, if you're not perfectly 100% balanced.

Questioner

Wouldn't it be affected by gravity? If you're Pushing and Pulling at the same time, there's still that downward *inaudible*

Brandon Sanderson

There is still that downward force but if you're able to do that, you're able to modulate your Push so that you Push slightly harder on the bottom. Does that make sense? You could do it, the real experts can do it, they can vary how much they're Pushing. But the big problem is the lack of friction. That lack of friction--normally if you're holding a coin with two fingers, it's not going to move. But with no friction, you tap it, it's just going to zip away.

Calamity Seattle signing ()
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Questioner

Well you answered my question about Allomancers being able to burn metals in other realms. Is that because the Shards are sort of…  My impression from the book was that the Shards were, in the Mistborn books, specifically in that area but is it because the universe is formed across all of them that that is why the metals...

Brandon Sanderson

So, most of the magics are not region-dependent, because the Spiritual Realm-- in the Spiritual Realm space doesn’t exist.  All things are the same distance from one another.

Questioner

Okay, so when Kelsier is in the-- Which Realm is he in?

Brandon Sanderson

He’s in the Cognitive Realm.

Questioner

Is he seeing people from other worlds or is he--

Brandon Sanderson

No, he meets some people who are traveling but Cognitive Realm is location dependent.  He is on the Cognitive Realm on Scadrial and the people he runs into there-- until he kind of travels off into space, which is where he finds the fortress.

Questioner

So even though he’s tied to Scadrial could he go to the Cognitive Realm of other worlds?

Brandon Sanderson

He would have trouble getting to another planet, being a Cognitive shadow like he was.

Questioner

So is there some particular thing that somebody would need to have to be able to move between the realms?

Brandon Sanderson

A body is helpful. Depends on what their ties are and things like that.  Not always, but yeah.

DragonCon 2012 ()
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Trae Cooper (paraphrased)

Why are Invested objects like metalminds and Hemalurgic spikes able to be Pushed and Pulled on, but Shardblades and Shardplate, which are also invested, are not susceptible to Pushing and Pulling?

Brandon Sanderson (paraphrased)

There were a few concepts that he outlined in answering this question.

1.) The ability to Push/Pull an Invested object is predicated to the amount/power of the Investiture.

2.) Further, Invested objects also gain resistance to pulling/pushing based on proximity to soul possibly via the soul. An example given is that a Hemalurgic spike touches the blood of the person, and from there is now part of both the Spiritual Realm and the Physical Realm. This provides what Brandon termed a kind of "soul interference," based on its proximity to the soul.

This further explains why Vin required more than normal power to Push/Pull the metalminds from the Lord Ruler, because of their proximity to his soul, via the Spiritual Realm.

3.) The amount of Investiture is relatively low on Scadrial, whereas worlds like Sel and Roshar are pushing around "high power" according to Brandon. I interpreted this to mean that Hemalurgic spikes and metalminds have low amounts of Investiture compared to Shardplate and Shardblades.

Brandon said that theoretically you can Push/Pull Shardblades and Shardplates but you would need to wield an incredible amount of power. One example he gave that could so such as a thing is that if you were a Mistborn wielding the full power of the Well of Ascension, you could Push/Pull Shardblades/Plate.

Orem signing ()
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Mason Wheeler

Kelsier said to Vin, "Always make sure to burn off your metals before you go to sleep," because of toxicity issues. And when we get to Second Era, that just makes me think, because cadmium is truly nasty stuff. And most metals to burn them off, that'll be just fine. But with its effect, it would mean that trying to burn it off would shorten the night and you don't end up with any time to sleep. How does Marasi deal with this?

Brandon Sanderson

You measure very carefully and you deal with the side effects of being an Allomancer.

General Reddit 2011 ()
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AnalogDigit

[Mistborn] would be AWESOME cinematically, except I don't know how the internal use of the metals and their powers could be conveyed on screen.

Brandon Sanderson

The producers have some good ideas for giving visuals on those. Iron/Steel, for example, would make all sources of metal glow faintly blue on the screen while the allomancer is burning.

Stormlight Three Update #5 ()
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Yata

Can a Misting hurt himself burning the wrong metals or a bad alloy ?

Brandon Sanderson

Not really, but they can swallow something they can't burn and end up with metal poisoning. Kind of similar.

Yata

So we may tell that a Misting's Allomancy is "safer" than a Mistborn's one.

Maybe because it's the original/natural way how Allomancy manifest itself (without godlike interferences)

Brandon Sanderson

Sure, you could potentially say that. You can still make yourself sick, though, so I'm not sure. I guess it comes down to your definition of "hurt." But I'd call it safer, yes.

Holiday signing ()
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zas678's sister

If Wayne and Breeze, like if Wayne had a time bubble up and Breeze was inside Pushing on somebody's emotions what--

Brandon Sanderson

He could still make that work.

zas678's sister

Would it affect it?

Brandon Sanderson

Not really. It wouldn't dramatically affect it. You're going to have one of these sort-of effects-- Yeah, because what he is doing is on another Realm, it's not going to affect it.

zas678's sister

Is that the same with all of the *audio obscured*

Brandon Sanderson

Not necessarily. See what's going on is if you are affecting things on the Cognitive Realm--

zas678

It's kind of time-independent?

Brandon Sanderson

Yeah? It's not as-- Really it's the Spiritual Realm that is completely time-independent, right? All time and space are irrelevant once you reach the Spiritual. You're kind of going to go over the top a little bit, it's going to work just fine. In fact you can probably-- So he could use that to make his metals last a little bit better, probably. So that is a hack of the magic systems that you could probably do.

Words of Radiance Omaha signing ()
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Kythis

When you spike somebody, say a full Mistborn, with a steel spike, it could end up with four different charges.  Does it get all four of them it just depends on where you place it?  

Brandon Sanderson

Where you place it it can get all four.  Spiking a full Mistborn wastes a lot of power and the way that it's known, I mean, it doesn't have to, but the way that it's known to do it right now.

Orem signing ()
#294 Copy

Questioner

If I'm a Mistborn and I change planet-- if I go over to Roshar, do I have to bring metal from Scadrial with me?

Brandon Sanderson

No, you do not.

Questioner

Could I use Stormlight, and just have the same power?

Brandon Sanderson

Not-- not-- It would take some work.

Questioner

Yeah, okay. Okay, but I could use steel from Roshar, and you can-- Okay, thank you sir.

General Reddit 2018 ()
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Marsh treats seeking and smoking as an either/or

And what would be the greater advantage? Being immune to — but ignorant of — some Soother's attentions? Or instead knowing — from your bronze — exactly which emotions he is trying to suppress?

If you could do both at the same time what he's saying doesn't really make sense.

In addition, Vin switches off her copper before burning bronze and vice versa

TFE:

Curious, Vin extinguished her copper for a moment, burning bronze instead, trying to sense Breeze's use of Allomancy. No pulses came from him. Of course, she thought. I forgot about Clubs's apprentice— he'd keep me from sensing any Allomantic pulses. She turned her copper back on.

and

Let's try something, then, Vin thought, extinguishing her bronze. She lightly began burning copper to mask her Allomancy.

WoA:

The Thugs charged, but Vin retreated, frowning. Why kill the Smoker? He wasn't a threat anymore.

Unless. . .

Vin extinguished her copper, then burned bronze, the metal that let her sense when other Allomancers were using powers nearby. She couldn't feel the Thugs burning pewter. They were still being Smoked, their Allomancy hidden.

Someone else was burning copper.

and

She still wanted to find those Allomancers, and there was only one way to be certain. She turned off her copper, then burned bronze.

It would be extremely odd for Vin to keep doing this if the powers didn't interfere with each other. Maybe /u/peterahlstrom can put the topic to rest?

Peter Ahlstrom

The seeker being at the soothing station is an interesting example. I want to say they might be able to sense from outside the coppercloud, but that contradicts that secondhand WoB. I also don't think the soother and smoker were on the lower floors. It says those are unused.

Words of Radiance Philadelphia signing ()
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Questioner

Several of my friends play the [Mistborn] tabletop game, and we have a question, so, if you want to burn a metal Allomantically do you actually have to ingest it, or can it just be in your bloodstream, or-?

Brandon Sanderson

If it gets in there somehow, you can use it.

Questioner

So you can inhale something, or inject something ... what about spikes? Could you like burn a spike that was-?

Brandon Sanderson

Yes, you could, but not if it's Hemalurgically placed or Hemalurgically charged. But otherwise yes. If it gets in you-- I almost wrote a scene where someone got stabbed through the chest and they burned it. The problem is your metal also has to be of the right allomantic alloy.

Words of Radiance Washington, DC signing ()
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Questioner

Would Allomancy affect Shardplate or Shardblades?

Brandon Sanderson

It cannot affected Shardblades. Well, "cannot" is a strong word. Things with innate investiture are much more difficult to affect with any of the magics at all. Which is why it's very hard, for instance-- Szeth is not able to bind people, or Lash people wearing Shardplate to the ceiling. In the same Allomancy would not be able to Push on it without some help. Duralumin and a really strong [Steel]Push could probably do it. 

Questioner

I was just wondering if it's actually metal.

Brandon Sanderson

Oh yes. It is metal-ish... it is metal enough for Allomancy to work on it.

Calamity Austin signing ()
#299 Copy

Questioner

If Hoid was on Scadrial during the original Mistborn trilogy, and had a bead of lerasium, and took it and gained Allomantic powers, could he then go to Roshar during Stormlight and still have those Allomantic powers?

Brandon Sanderson

Yes… Most of the magics are not re-- area centric, though a few of them are.