Seed bismuth

One of the Bookwyrm's frivolous suggestions as to where the Plume Coteries' Library might have come from was that it might have "grown from the seed bismuth". (PROSE: )
== Behind the scenes ==
The Seed Bismuth is a recurring element of the webcomic , with a repeated, contextless claim that it "grew from the Seed Bismuth" being the only explanation the main characters ever get about the origins of the titular structure.
Category:Fictional elements from the real world