The Dead Lands of Athas
The ruins known as Small Home sit on the western edge of the Obsidian Plain. In the Green Age, this place of small buildings with ornate decorations was home to beings called gnomes and a small number of pixies. Now the place has been covered by the same layer of black glass that coats everything in the Dead Lands, and hordes of small-statured undead creatures roam the area.
The adventurers were told by Goran of Whitewood that during the day, these demihumans retain their civility —even the normally psychopathic pixies are pleasant and composed. However, all this changes as soon as day turns into night. At this point the nice little humanoids become ravenous beasts, seeking the sparks of life within the living as moths to the flame.