I don't have the words right now, but I
adore all the looks into psyches, enchantment styles, cultures, and cultural exchanges this update, and how they all play into one another. Especially noteworthy in the wake of recent discussions.
Though I will say:
You don't want the structural capacity of a bridge to be exactly right, you want it to be far in excess of any foreseeable load in even the worst of circumstances.
Your Medieval-to-Renessaince-era Engineering perspective is showing, Mathilde
(Not that it's wrong, even outside the world she lives in, but still.)
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For portative names, it strikes me that It's an instrument of folklore. It fits that it has a vaguely mythic name, but it's also a whole run of instruments, meant to be crafted en mass.
I feel like short names are better. Especially since — as this update shows us with magic mapping — long names, used often, will find a way to become short names.
One could call it a Weber, a Horstmann, a Kas, or a Hochschild, a la a repute that grew up around the Stradivarius, but it doesn't fit the group project aspect as much. That said, I think a very short name does fit the idea. Something people could talk about the same way they would talk about "the old Henway."
Alternatively... One could invoke the group project between the Light and Grey Colleges that created it by giving it a name not to invoking light or shadow, but the way light casts a shadow. And perhaps the way the music takes an imprint from magic. Especially if it also invokes theatre, given Kas.
"The eclipse" seems like something that might fit the theme, but is a bit off. (a little too much gravitas for an mass instrument
GSV) There's a space here for something that fits the meaning and connotations, but I'm a bit tired to find words that fit it properly.
...Or that, yeah. Simple, clever, punchy, serviceable. Biggest issue is that people might stumble over the small difference from Portative, but there's an aesthetic there in itself.
(Two townsfolk gossiping about the new instrument.
One says "Portentive Organ"
The other, a pedantic, says "You mean port
ative organ."
Obvious omens come out.
The first says "no.")