The Prophecy

The Prophecy is a vague prophecy that both the Guild of Draconis and the Dragon Initiate have been researching and trying to capitalize on.

The Beginning
The players first encountered the prophecy in their first outing together. The magical cave that drew all the players to that location had the phrase "Beware all who enter, inside there be dragons..." in Draconic. Upon entering, they found a archway/portal which had more words in Draconic, saying "When the chosen one arrives, the two points will meet" written above it.

Afterwards, Oswulf, a member of the Guild of Draconis and mentor to Quintin, deduced that this was part of a prophecy that their group, and most likely the Dragon Initiate as well, have been researching.

In the Capital
After several adventures (here, here, and here) the party eventually reached the capital and spoke to Carabath Wildrunner, advisor to the King and member of the Guild of Draconis. Using divine means, he tried to determine which of the party members was the "chosen one", but something very powerful prevented the normally helpful divine spell from answering that question.

Carabath determined that the party must stay together and work for Agria and the Guild of Draconis until they could determine who the "chosen one" was and who was needed to complete the prophecy.

Coras' Sidquest
During a few adventures (here and here), Coras Maywin traveled with Riffin on a large sidequest. During the course of this adventure, Coras overheard that Riffin was not the "chosen one", and that Riffin apparently had previous knowledge of this and hadn't told anyone.