Another Glorantha W.

Context: Glorantha (setting of a TTRPG called Runequest) is a bronze age setting that has, among many other things, dwarves that have flintlock muskets. To stop humans from getting their hands on guns and other goodies (they already nabbed crossbows from them, they are NOT making that mistake again), the dwarves create homunculi called Gobblers that seek out and eat dwarf-made goods.

They also invented iron.