Complex sentence: Comelle was the third-largest city in the Age of Legends, was placed along a steep coastline, with structures of glass, crystal and metal clinging to the rocks like a bursting flower, overlooking the sea.
Split into simpler sentences: Comelle was the third-largest city in the Age of Legends. It was built along a steep coastline, with structures of glass, crystal and metal clinging to the rocks like a bursting flower overlooking the sea.