Here's what I've got so far:
For starters, I'm mixing a few of the different creation myths together.
I'm starting with
Io the Concordant Dragon as the creator of the uni/multiverse. Very much like FR's Ao, he's the overgod that no one really pays any attention to. He either dies, and from his corpse spring the three Progenitor Dragons, or he just creates them as his offspring and then sits back to watch in classic deist "wind up the clock and let it go" style.
The Progenitor Dragons are
Siberys,
Erathis, and
Khyber. (I changed Eberron to Erathis, which I co-opted as the name of my 5e homebrew world.) Their story follows the First World/Eberron creation myth pretty closely. Khyber kills Siberys, who shatters into the planet's ring of gem shards. Erathis imprisons Khyber "within" herself.
Erathis is basically Mother Earth, while Khyber is the Underdark/Underworld. Siberys could be the Sky Father, except he's kinda dead.
Then I've got
Tiamat the Chromatic Dragon as the Daughter of Khyber and Queen of the Evil Dragons/Gods or Fiendish Overlords, while
Bahamut the Platinum Dragon is the Son of Erathis and the King of the Good Dragons/Gods.
Sardior the Ruby Dragon is the non-binary child of Siberys and leader of the Neutral Dragons/Gods.
The
Lords of Light are the metallic greatwyrm gods of good:
- Bahamut is the king of these gods and, as such, he's the source of divine laws, spiritual justice, etc. He is considered to be a stern god, but also compassionate. He protects the weak and downtrodden and gives mercy to those who deserve it.
- [Gold Dragon God] is the "Hand of the King", the Golden Magistrate who enforces Bahamut's laws. He seeks out, exposes, and punishes evil doers. He is the patron of law enforcers, judges, lawmakers, rulers, and so on. I'll probably model this god on Heliod from Theros.
- [Silver Dragon God] is a bit of a mix of Athena and the whole triune "Maiden/Mother/Crone" moon/fertility goddess thing. She's the god of community/civilization and the defense of everything they entail. In her Maiden aspect, she represents innocence, love, beauty, and that sort of thing. In her Mother aspect, she represents fertility, childbirth, sensualism, etc. In her Crone aspect, she represents wisdom, guile, camaraderie, and leadership.
- [Brass Dragon God] is the god of the "exchange of ideas and their by-products". S/he is the god of communication, discovery, invention, craft, and trade. S/he is sometimes depicted as the Messenger of Bahamut as well. S/he is the patron of artisans, craftsmen, traders/merchants, scholars, and simple travelers.
- [Bronze Dragon God] is the Defender/Guardian god. S/he is a god of action, athleticism, discipline, courage, honor, and fighting for what's right. Patron of athletes, soldiers, guards/watchmen and the like.
- [Copper Dragon God] is the Muse, the god of art, music, poetry, humor, and the like. (I don't want to focus on the trickster/prankster aspect of copper dragons because I'm making that the purview of the faerie dragon god [see below]. Also, since the sidebar in Fizban's talks about how bards seek out brass dragons as their muses, and copper dragons have creativity as one of their ideals, I might end up swapping brass and copper around.)
The
Lords of ?? are the gem greatwyrm gods of neutrality:
- Sardior is the leader of these gods. They are ... ?
- [Amethyst Dragon God] is the Scholar, god of knowledge, including magic, the cosmos, and the sciences.
- The [Crystal Dragon Gods] are the Twins - one is more serious and focuses on divination/fate and the stars, while the other is more fun-loving and is focused on hospitality, healing and the like.
- [Sapphire Dragon God] is the Glittering General, god of strategy and vigilance, patron of tacticians and those who guard against intrusions from the Far Realm.
- [Emerald Dragon God] is the Spy, god of illusions and secrets, patron of spies, observers, and illusionists.
- [Topaz Dragon God] is the god of decay, decomposition, and "wiping the slate clean". (I might completely revise topaz dragons, as they're just weird and don't really fit in and kind of feel a bit redundant when included with black dragons. I suppose I could make the topaz dragon the non-evil god of the dead and [non-evil] undead and such, while the black dragon is more like Orcus.)
The
Lords of Darkness are the chromatic greatwyrm gods/overlords/fiendish princes of evil:
- Tiamat is the queen of these gods. She's a bit like Hades in that she is in charge of the Underworld and is also all about the acquisition and hoarding of material wealth.
- [Red Dragon] represents anger/rage/aggression. Similar to Ares. Makes presence known through volcanic eruptions, heat waves, and the like.
- [Green Dragon] is the prince of lies and deception, the schemer who poisons people's minds as well as their food.
- [Blue Dragon] is the ultimate tyrant - all about loyalty, "family" (in a mafia sense), and order taken to the extreme.
- [Black Dragon] is all about death and decay. Maybe also undeath a la Orcus.
- [White Dragon] is all about survival of the fittest with a preference for arctic/wintry climes because those are the harshest ones to try and survive in.
Then there are the other dragon gods who aren't affiliated with the above three groupings:
- [Moonstone Dragon God] is basically Lliira from the Forgotten Realms, a pacifist goddess of joy and revelry. Maybe also nature. Embodies the "abundant nature" aspect of the Feywild.
- [Faerie Dragon God] is the god of mischief and revelry. Embodies the mischievous aspects of the fey.
- [Dragon Turtle God] is the temperamental god of the sea and storms and also the endurance of said elements.
- [Deep Dragon God] is a god of arcane secrets and Things Man Was Not Meant to Know (TM). Maybe like Vecna?
Erathis can fill the role of god of agriculture, bounty, fertility, animals and nature (Chauntea, Karametra, Demeter, Gaia, etc). As in Eberron,
Siberys can be the source of all magic.
Khyber is the source of all evil things.
One thing that's still bothering me is why the gods/fiends of "darkness" are represented by various colors. Ideally, it would probably be best to replace them with the catastrophic dragons and have them represent the perils of the natural world or something, but the chromatic dragons are just so darn iconic! Ugh.