Parmandur
Book-Friend, he/him
Given the available art books (and the companion plane shift docs) what else is missing, apart from setting specific adventures?
Well, I suppose maps for Zendikar and Amonkhetand the one for Ixalan is not very nice/clear IMHO. But what else that can't be adapted from the MM etc? (And I did upload a homemade Zendikar world map a while back
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I think you got the nail on the head with the "setting specific adventures." Chapter 5 of the GGtR, and Chapter 5 of Rising from the Last War, is all about genre specific Adventure generation tools. A big, big chapter like that, a big Bestiary chapter, magic items and more character creation options....AND yes, map stuff and Gazeeter material...
We're talking about a book chock full of content by that point. Necessary, no. Nice to have, yes.