I've noticed something odd: the gold dragon and the bronze dragon both can cast guiding bolt, but while the bronze dragon has its spell attack bonus in its stats, the gold doesn't.
Odd that they chose to preview the one that seemingly has a missing part/mistake in it as their example of a stat...
The quote on the zombie entry mentions Marais d'Tarascon, from Souraigne in Ravenloft, and the smoke mephit entry quotes a mephit shopkeeper in Sigil from 2e Planescape, for other examples I've noticed so far!
I like the little lore bits in this book! The Marid entry mentions the City of Glass, for example, which I wasn't expecting! The boxes of flavour text are really cool, too!
I wondered about oni after Bigby's implied they were Fiendish, so that makes sense! And I love my gross bug Fiends, so I'm pumped to find out more!
Thank you so much! Can't wait to pick up my copy!