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So, we know that ettmetal/harmonium can be used to replicate Allomantic abilities (engines using Steelpushing to move turbines, primer cube/grenade Wax and co charged with Allomantic steel, Allomantic cadmium and Allomantic bendalloy). While all those abilities are external Allomantic and we don't know how would internal work (for example, how would tin work with allomantic grenade?), perhaps they could be used also with feruchemy. Thus, we could make machines which could use Allomancy and Feruchemy (and perhaps Hemalurgy) since sentient machines would have a soul. Now, let's leave all the "hey, Metallic Arts golems/Terminators etc" and focus on other uses. How could we use the fact that machines could use Allomancy and Feruchemy? My first idea is computers using Feruchemical copper to store data. I think it could be faster than traditional methods. What else we could do with such technology?

Just wanted to pose a few questions about the "Allomantic Grenades", or the Ettmetal cubes that could simulate Allomancy (and Feruchemy). First, when the cube is first used, it is "Invested" with Chromium Allomancy, draining Wax's stores. However, I noticed that the cube does not touch Wax, as would be necessary with a Leecher. So why does it work? Later, when Wax is experimenting with it, the cube uses steel Allomancy as a filter for the power of the Ettmetal, but the cube somehow has the pushing power to move Wayne's metal belt and Wax's shotgun. Does the cube then replicate Wax's push force instead of using its own mass? Also, if it were using steel Allomancy wouldn't it be pushed out of Wayne's hand? If it does replicate Wax's push, could he increase his weight, then charge the cube with steel Allomancy, giving it a greater push force? Though it does not specifically mention the cube, it is probably a similar device, but the Set gets the ship to store its own weight so that it is lighter and easier for the ship to take off. There are a lot of implications here. Is the weight of the ship stored in a certain place? If the device is started in the same way by performing the Feruchemy, and could you use the device to make the ship heavier as well, or only if you had previously stored the ship's weight? Could someone store the ship's Identity then, store weight, creating an Identity-less metalmind of the ship's weight that the person could then use? If the ship can store weight, how would other things, such as health work with the ship? This topic is mostly to spur conversation and the flow of ideas about these curious devices, so let me know what you think...

I am almost certain that ettmetal is lithium. Here's why. 1: ettmetal explodes in water. The only metals that actually behave in this way are alkali metals, which means that ettmetal could be lithium, sodium, potassium, rubidium, cesium, or francium. 2: lithium, sodium, and potassium are the only ones that occur naturally in the world without human creation, and Scadrial will not have that tech for a long time, even in the south. 3: Sodium and potassium don't usually occur in pure form, so it would have to be lithium. Any objections? Ideas?

So I mentioned this in the Why Savants Exist topic over in Cosmere Theories, but Phantom Monstrosity linked an old topic they started back in '13 with some old info on the God Metals. Most interestingly enough, this info contains two possibly interesting ideas of what a Lerasium/Atium alloy does. http://www.17thshard.com/forum/topic/3409-old-god-metal-info/ I can't bolden/italicise on my tablet but I would like to emphasise where it says 'a substance so volatile it would have world ending repercussions'...Sound like something we know? TL;DR - Ettmetal could possibly be (as already theorised by others) a Lerasium-Atium alloy, which given the opposing and neutralising nature of R&P, could explain the volatility of it. EDIT: The reason I say an alloy instead of Harmonium is the alloy would be two metals in one, where Harmonium would be it's own metal entirely; incredibly similar, yet fundamentally different at the same time