You've also seen one other manifestation like this....
Such as...this?
The "lake" was barely ten feet deep—more like a pool. Its water was a crystalline blue, and Raoden could see no inlets or outlets.
If that's what you're hinting at...I never thought of the connection before! I just kept thinking of Aether of Night, and never thought of this pool at all.
I'm also thinking that the Dor in Elantris is another Shard of Adonasium. Certainly in the Elantris world, where the Dor came from is rather ambiguous, which I expected it would be. Of course, if other Shards of Adonasium do exist, the Dor could have come from that source.
If that's the case, what's the counter-Dor Shard?
Here's my questions from the book:
1. Preservation can fuel Allomancy, (Minus Atium.) but can Ruin fuel Hemalurgy? (Or Atium?) And could Sazed fuel all three Metallic Arts?
2. Are Atium and the External Temporal Pulling metal really the same?
3. Are there any Allomantic metals we have not seen yet, besides Chromium and Nicrosil?
4. Does every metal have a Feruchemical and Hemalurgic property? If not, are there metals which have Feruchemical or Hemalurgic properties which do not have Allomantic ones?
5. When Vin is feeling out The Lord Ruler's final message plate, she finds a circle with a dot at the center. What does that mean?
I think that's all for now. I'm sure I'll have more soon though.
1. Both gods could, if they wanted, fuel all of the metallic arts. Preservation is stronger at fueling Allomancy, Ruin stronger at fueling Allomancy or Feruchemy when it has been given via a spike. Both are balanced when it comes to Feruchemy. But this rarely comes up in the books, as it required expending power in a way that the gods were hesitant to do.
2. You are on to something.
3. RAFO. (Sorry.) Let's just say that when Sazed said there are two metals you haven't found, he MIGHT not have been referring to a metal and its alloy, but two base metals. Who knows. Gods can be frustratingly ambiguous in times like that.
4. Every metal has a Feruchemical, an Allomantic, and a Hemalurgic property. The godly metals each also do something else. There are several interesting Feruchemical powers yet to be discovered and revealed in the next series. Feruchemy is less widely understood because there were so few practitioners in the modern era, and a lot of the time they were too afraid of capture to really study and use their powers.
5. No big reveal here. That was to mean the center of the empire, which allowed one to place the map (which was very abstract) in reference to the empire.