I play on Emperor and up, I have started quite alot of games, yet I still haven't been able to spawn a Great Prophet and a religion. I tried a few times for Stonehenge but that goes very quickly. By the time my cap builds a holy site and a shrine, and I get the Prophet wild card, I am so far behind that the religions go before I can catch up. The boost or whatever it is called is also too late. Is there some secret I haven't figured out?