What is the deepest point in the Aion Sea (that's the Elder Empire sea, right? Forgive this one's idiodicy if he's wrong.), how deep is it, and what is the most horrible creature that lives there?
The Vebross Pit is a legendary location at the bottom of the Aion Sea, passed down through Navigator tradition.
No one has ever explored it--there are many shallow locations in the Aion Sea that have never been explored, to say nothing of the true depths--but many Navigators employ Soulbound with water-scanning and scouting powers. All of them report impenetrable depths around a general location near the center of the Sea, and that area has been referred to as the Vebross Pit.
The ocean seems almost dead around the Pit, with no sightings reported of anomalous events, Kameira, Elderspawn, or anything but natural fish. Therefore, the Navigators once preferred routes over the Pit.
But that only lasted a short time.
Navigator ships began to go missing. This is not in itself too unusual, but when it continued for three or four years and started to cost the Guild money, the Guild Head sent out an expeditionary force to investigate the Pit.
The Witnesses accompanying the expedition returned reporting a phenomenon that happened at night. As the moon rose, a vast humanoid face seemed to rise from the depths. It grew closer and closer, until the captain of their vessel realized that the face was big enough to cover the ocean for miles.
Their force escaped with no losses, and from then on, the Vebross Pit was classified by the Navigator's Guild as an Unknown Danger Zone. A captain plotting a course through such a zone must leave all Guild assets behind, as they are likely to be lost.