Something I've been doing in #DungeonWorld for a long time, without realizing it, is structuring the setting like #ApocalypseWorld. Specifically in regards to magic and ancient technology being a stand-in for the Psychic Maelstrom.
It's a stock fantasy trope, though I'd stolen it from Breath of Fire in particular. The world has an ancient past with secrets we can now only fathom and they're going to bite the PCs when they meddle. The endgame is about dealing with this crap.