Okay, me going through the thread talking about Harmony Blades when I started thinking about Ettmetal's (Harmony's Godmetal) properties, like the fact it explodes, making it pretty bad for normal uses people would have for metals. And I know there is the explanation the reason Harmony's metal explodes is because of the powers of Preservation and Ruin being represented and all that, but why would Harmony, the supposed perfect mix of the two shards, be represented in a metal that explodes? Why would it be so reactive? I would think it would be more like a noble gas and just not react with anything. So I see two potential explanations.
Either 1. Ettmetal is more likely the godmetal of Discord, which would make more sense. An explosion seems like a nice representation of discord. However, this doesn't completely work because for now, as it doesn't seem like Sazed is Discord and it might have even been stated that ettmetal is Harmony's god metal. And then there's the fact I tend to push back at the theory that Sazed is Discord because I imagine if he was, it would be very destructive for the Scadrians, but maybe he is more in Discord with himself and is still conscious enough to not end up screwing over the planet he cares about. Something to think about. The other explanation is
2. the metal is currently symbolizing Sazed's struggle with the powers and that's why it' so reactive right now, because he still hasn't figured out how to deal with the contrasting intents, and the metal will eventually start to change as Sazed gains mastery of his abilities, becoming less and less reactive, as ettmetals abilities seem to be more about it weird storing and realizing of investiture rather than it's reactivity. So maybe one-day Ettmetal, or at least further production of ettmetal, will become stable, like a normal metal.
(Also, random thought that popped in my head, but when Shardblades are summoned, they are covered in condensation, which would be bad for a metal that explodes when in contact with water. Wonder if there's a connection there.)