There are also Dragons like the Deep, Moonstone, and even the Dragon Turtle, which neither Bahamut or Tiamat seem to want to take credit for. These are the Amethyst, Crystal, Emerald, Sapphire, and Topaz Dragons. There are also the Gem Dragons, descendants of Sardior, the Ruby Dragon and first offspring of Bahamut and Tiamat. Both the Chromatic Dragons - the White, Blue, Black, Green, and Red that more often than not serve Tiamat - and the Metallic Dragons under Bahamut - Brass, Bronze, Copper, Silver, and Gold - are represented here. The book expands the kinds of Dragons one might face. But the idea is really intriguing - Ashardalon, for example, the villainous Red Dragon from the 3e modules The Sunless Citadel and Bastion of Broken Souls is now the Dragon version of Jet Li from The One, literally consuming other versions of himself to become a terrifying threat to multiple worlds at once. Yes, in this book, Dragons are now living in the pre-Crisis DC universe and can have team ups with, and/or fights with, other universe versions of themselves, and if you don’t get that reference trust me you’re better off. Some of these Dragons, known as Greatwyrms, are so powerful that they’re almost seen as gods - and if you’re wondering where your favorite Dragon deities from previous editions of D&D are, they’ve likely been converted to Greatwyrm status and serve, less as Dragon gods, and more like intensely powerful Dragons that span multiple plains of existence at once and can see into other realities. He’ll even potentially know who they are, and that they killed another version of him out in the multiverse. Even if your players kill him he can always pop up later if they go to Krynn.
He’s still the same treacherous, poisonous, malevolent force he was in the Dragonlance series - he’s just your setting’s version of the Dragon. You’re not playing a Krynn campaign, but you want to use Cyan Bloodbane in your new adventure for your party? Go for it. While this is extremely metaphysical, what it boils down to is the idea that you can use any Dragon - from any world or setting for D&D - in your own campaign. The Death of the First World and how Dragons made everything It also gives Dragons the ability to see into other realities and even exist on multiple worlds at once in different incarnations.
It lays the foundation for Wizards of the Coast’s new iteration of the multiverse idea, with Dragons serving as a key touchstone to and aspect of the material plane, and the Dragon Gods Tiamat and Bahamut as forces of divinity wholly of said plane and responsible for its creation - or at least that’s their story. While I’d also like a copy of Acererak’s Guide to Dungeons while we’re at it - completing both the Dungeons and Dragons halves of Dungeons and Dragons - what we get in Fizban’s is pretty amazing. We apologize if letting you know the Dragon book is about Dragons spoiled it for you.
Fizban’s Treasury of Dragons is a new sourcebook for Dungeons and Dragons 5e, and it’s all about Dragons.