Prophecies Fulfilled series

The Prophecies Fulfilled series is a fanfiction series that takes place after the Heroes of Olympus and introduces the last of Prometheus' prophecies: "Zeus would be killed by his own son, like his father and grandfather before him", an immortal survivor of Zeus' purge has been growing in strength while Gaia has been causing problems for the Olympians and with Gaia having gained a human-like body before her children's defeat, while Gaia distracts the Olympians he intends to awaken his old allies and find more to complete his Organization XIII.