In the middle of the night before the heroes left to sail down the River Esk Brantos Calderon wakes them with urgent news.
Katrezra needs to see them immediately over visions he is having. As the dwarves come to the Sanctuary they are met by the crippled half orc. He says he has been having visions that have been troubling him and he wants to tell them before they leave.
The main point from each of these visions were:
There is another
A Giant Riding Dragon over a Great Cathedral
Beware of The Harbinger of Decay
Unite the Family
After he explained the visions and his interpretations he left the dwarves to their own devices.