Good questions!
I think charting out the Metallics, we'd probably need to switch sigils too, like for the full Heptagon appendix on that one.
For the Lucky 7 (the ancient metals) Iron, Tin, Lead, Copper, Silver, Gold, and Mercury, those dragons are all in pretty good standing.
I'm partial to the Tin and Lead dragons myself, since they often seem under-represented. Among the wrought metallics as well, the Pewter dragons definitely more my speed, compared to say the Steels and the Bronzes, or even the real rarities like a Platinum or a Meteoric Iron. With a 7-7-7 slot machine thing, you can get a little mirror going there between the 7 colors of the ROYGBIV rainbow, and the 7 Metals, which seems cool for some esoteric mathematics. Like maybe the Chromatics get the x5 heads multiplier vibe, but the Metallics are somehow 7s across the board, with some counterbalance there, depending on where in the draconacci sequence we begin?
When it comes to the more Alchemical Dragon pedigrees probably would have to table some edge cases till we can double check our charts, except for the noble gases, cause every one of those is obviously named for a badass Dragon.
Like I definitely wouldn't want to be the one who has to tell Xenon that he's not a dragon! hehe
Or cousins Radon, Argon, and Krypton? Seems like it would be the height of folly to deny any of those noble dragon houses!
The last confirmed sighting of Neon the Dragon, was probably on a layover, somewhere between planes. Like beneath the haunted ruins of Vegas, or thereabouts...
The cult of Helium the Dragon is also not to be underestimated.
Rumor has it there are conclaves all over the place, but they tend to reveal themselves only once or twice a year. Like on parade, or possibly at birthday parties hehe
As for the rest of the Periodic periodicals, hard to say there. The mysteries surely abound, but I'm definitely intrigued! The Gems and Crystal dragons probably maintain some hidden hordes nearby for sure!
ps. for random Wyrmlings (of substances unknown) I thought this variety had all gone totally extinct... like mainly due to loss of habitat when the malls closed down, but it seems they're making a comeback! In the wild regions between here and Etsyland they seem to have found a new ecological niche. Their numbers are on the rebound! lol
Fly on little drakes! Fly on! heheh. I had a red and a green dragon, like old TV, pretty similar that I got at the fair, but these newer hybrids are full on twisted sister style with the color combos! Gotta dig it!
Salt dragons for sure! Long as Sulfur is invited, makes sense. Water dragons at the pool party, or the hot springs!
Whatever works!
Classic! Lol