"Percy," Apollo said, "I wouldn't worry too much. The last Great Prophecy about took almost seventy years to complete. This one may not even happen in your lifetime." I thought about the lines Rachel had spoken in that creepy voice: about storm and fire and the Doors of Death. "Maybe," I said, "but it didn't sound so good." "No," said Apollo cheerfully. "It certainly didn't. She's going to make a wonderful Oracle!"