Complex sentence: However he survived the attempted sacrifice at the Cenote of Chichen Itza, but having spent a night in the water he was able to relate a prophecy of the rain god Chac about the year's coming harvest.
Split into simpler sentences: However he survived the attempted sacrifice at the Cenote of Chichén Itzá. Having spent a night in the water he was able to relate a prophecy of the rain god Chac about the year's coming harvest.