Complex sentence: In "Prometheus Bound", Typhon is imprisoned underneath Etna, while above him Hephaestus "hammers the molten ore", and in his rage, the "charred" Typhon causes "rivers of fire" to pour forth.
Split into simpler sentences: In "Prometheus Bound", Typhon is imprisoned underneath Etna, while above him Hephaestus "hammers the molten ore". And in his rage, the "charred" Typhon causes "rivers of fire" to pour forth.