Praying Allomantis

Shardcake.

Is Threnodite silver investiture-neutral, like Scadrial aluminum? If so, no power (light) would be leaking through it from the spiritual realm. Insofar as talking tools go, is it possible for a bonded spren to get separated from its Radiant and stuck in metal form? [Edgedancer Spoiler] We've seen spren manifest not only as swords and spears, but as metal bars or forks. What if a Rosharan worldhopper ordered his spren into tool form and then lost it?

There are definitely several occurrences of the name in White Sand. Mastrell, Lestrell, the foreman. It seems to have worked its way into the language.

I've always wondered if Hoid's time with the Terris in WoA has anything to with his Feruchemy. As a couple other people have mentioned, we don't know how the art originated, only that it is passed through the Terris bloodline, but we do know that the Terris are very secretive about their magic. It also seems possible, as of BoM, Also, the Terris are very Realmatically aware. Could Hoid and/or the Worldsingers have been involved in their origins, and thus part of the original development of Feruchemy?