"Painting The Temple of Elemental Evil" by Paul Gestwicki https://paulgestwicki.blogspot.com/2016/08/painting-temple-of-elemental-evil.html
In case you are curious, the Air Elemental was indeed defeated.
And then I took a shower and came up with a world based on a Mongol-Roman inspired nomad-hypercivilized human Empire in the middle that is splitting in two halfs after a long crisis. The west is rich and established so looks set to survive but the East might collapse any time. There are Orc frenemies on the west, dwarf migrations destabilize the east, trader elves in the south. Finally: human viking/cossack renegades in the swamplands and rivers between the western empire and its orcish allies.
All too often in fantasy "eastern" gets mapped to "orc/goblin".
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