What kinds of Metallic Dragons were ever shown in D&D products? [closed]

Everyone knows the iconic metallic dragons that come in almost every single core monster book, Gold, Silver, Bronze, Copper, Brass. Let's call those the "core five"

There were some others, like dunno Steel, Iron, Platinum, Electrum, Uranium(?), and what else...

What kinds of metallic dragons other than the "core five" were shown in D&D products?
What were their ecologies and demeanors?
In what worlds did they debut/existed?

• While I think this may be too broad, there is likely a finite number of metallic dragons (as you note) so it may fit within scope. Suggest you include Bahamut as one of the core, as the Platinum dragon has been with us since Greyhawk supplement to OD&D Nov 21 '17 at 17:37
• Having done the work for 3.5e, I think I agree with @KorvinStarmast—too broad. For one person to try to do the same for every edition, and then to put it into one answer, that would be too much, I think. Nov 21 '17 at 18:22
• I think you could probably get away with separate questions for each edition, though. Nov 21 '17 at 21:30
• @KRyan Ok senpai. Nov 21 '17 at 22:45

In D&D 3.5e, the most-complete listing of true dragons is in Races of the Dragon on pages 70-72. This list gives the stats of the half-dragon version of every dragon, and claims to be complete. However, the only apparent metallic dragons on the list are those from Monster Manual. Even other good-aligned dragons, namely the battle dragon, Oceanus dragon, and radiant dragon, don’t seem to be metallic. The list does mention the rust dragon from Draconomicon, which is arguably sort of metallic, but it’s notably lawful non-good.

Anyway, the Races of the Dragon list misses the steel dragon that you noted; the steel dragon was published in Dragons of Faerûn in August 2006, while Races of the Dragon was in January of the same year. Still, January 2006 covers a whole lot of the 3.5 life-cycle, so we do not have to search as many books to find other dragons. Monster Manual II and III are covered by Races of the Dragon, for instance, and Monster Manual IV has no dragons while Monster Manual V has only specific named individual dragons of existing types, not new types of dragons. Similarly, Dragon Magic focuses on magic available to and/or derived from dragons, and while it has many options for dragons, it does not have any new dragons itself.

Magic of Incarnum is semi-notorious for having a dragon, the incarnum dragon, that Races of the Dragon missed—it was published in September 2005, not long before Races of the Dragon, but nonetheless. (This is semi-notorious because its absence has been used as justification for not seeing dragonwrought kobold’s absence in the list as definitive of anything.)

So OK, every book published since September 2005, then. Using HeyICanChan’s handy list, then:

Year Month Title Checked? Findings
2005 Sep Magic of Incarnum incarnum
Sons of Gruumsh
Oct Heroes of Horror
Magic of Eberron
Nov Champions of Valor
Fantastic Location: Hellspike Prison
Dec Spell Compendium
2006 Jan Player's Guide to Eberron
Races of the Dragon
Feb Red Hand of Doom
Mar Power of Faerûn
Tome of Magic
Apr Complete Psionic
Fantastic Location: Fields of Ruin
Voyage of the Golden Dragon
May Player's Handbook II
Jun Fiendish Codex I
Mysteries of the Moonsea
Jul Fantastic Location: Dragondown Grotto
Monster Manual IV
Secrets of Xen'drik
Aug Dragons of Faerûn mercury, mist, steel
Tome of Battle
Sep Dragon Magic
Faiths of Eberron
Twilight Tomb
Oct Complete Mage
Expedition to Castle Ravenloft
Nov Cityscape
Dragonmarked
Scourge of the Howling Horde
Dec Animated Series Handbook
Fantastic Location: The Frostfell Rift
Fiendish Codex II
Shattered Gates of Slaughtergarde
2007 Jan Complete Scoundrel
Feb Barrow of the Forgotten King
Dungeonscape
Secrets of Sarlona
Mar Magic Item Compendium
Cormyr
Apr Eyes of the Lich Queen
Expedition to the Demonweb Pits
Fantastic Location: City in Peril
May Complete Champion
Drow of the Underdark
Jun Expedition to Undermountain
Forge of War
Sinister Spire
Jul Monster Manual V dragon characters
Aug Expedition to the Ruins of Greyhawk
Sep Exemplars of Evil
Fortress of the Yuan-Ti
Grand History of the Realms
Oct Dragons of Eberron dragon characters
Rules Compendium
Nov Anauroch
Dec Elder Evils
2008 Feb City of Stormreach
Mar An Adventurer's Guide to Eberron

So it seems that the mercury dragon and steel dragon were the only additional metallic dragons to ever be published by Wizards of the Coast for D&D 3.5e, both in Dragons of Faerûn. Note that web articles and/or officially-licensed-but-not-WotC-published sources like Dragon magazine are not covered (HeyICanChan notes in a comment that Dragon included adamantine, chromium, iron, nickel, sodium, and tungsten dragons). And, of course, there are many books I don’t own myself to check; none of these seems very likely to have a dragon, but there are enough of them that it seems hard to claim that none of them do.

I cannot comment on other editions, as I do not have the resources to embark on a thorough search like this for them.

• If anyone has access to a book I don’t have checked off here, feel free to check it and either let me know, or edit in a & \checkmark for that book yourself. Nov 21 '17 at 18:38
• I found the same for 2e; only steel and mercury are additional metallic dragons. Nov 21 '17 at 20:50
• @KorvinStarmast While it may be beyond this answer's mandate, Dragondex also lists as having been published in Dragon the adamantine, chromium, iron, nickel, sodium, tungsten, and rust dragons (the last may or may not warranting inclusion). Nov 21 '17 at 21:29
• @HeyICanChan I don't think we are including the Dragon magazine "idea forum" as canon. I prefer to limit the scope the way KRyan has ... I was reading an early Dragon issue the other day, and Kask made a very clear statement: the stuff in Dragon for OD&D and 1e, at least, was "use it if you want, or not, in your campaign." That isn't "canon" like stuff in published books. Nov 21 '17 at 21:30
• Updating books I haven’t checked now involves typing | ✓, which is more annoying than & \checkmark, but you are still welcome to do so (I recommend copy ‘n’ paste). Or just comment and I can do it. Jan 30 at 4:05