A couple ToB things that fell out of my head

[Krimm_Blackleaf]

acid fog: secluded human adepts living in the lowland marshes of a subtropical continent. rumored that they consider themselves descendants of the great wyrm green dragon that lives under the black swamp.

shocking sky: a monestary of genasi and high elves that lives in the highest peaks of an island floating in the elemental plane of air.

I was thinking something along those lines, yeah.