Scores of them. Anauroch and the Plains of Purple Dust are big ones, but smaller ones, like the Calim Desert, are more 'in the way' of trade routes, etc.#Realmslore
— Ed Greenwood (@TheEdVerse) April 1, 2020
There have been: the Desert of Desolation series, put into the Realms at the beginning. And others, too.
— Ed Greenwood (@TheEdVerse) April 1, 2020