The Lost Ones
There once lived an ancient race in Avalos. Ruins of great cities and structures - many now inhabited by humans - are scattered across the known lands. Little is known about them other than that they had an incredible command and understanding of magic and the universe. They created a vast network of transportation conduits that connect the planes, called thundershifters. The jewelry and artifacts they left behind are some of the most powerful known to exist. The only people that cohabited the world that we know of are the Aikawa - and they refuse to discuss the matter. Likewise, I have encountered a dragon or two that hint at a relationship between their own existence and the Lost Ones. I asked a Watchman about them once, and was told that the matter was "simply far too complex to discuss". Where they went is unknown - only that they vanished all at once, and quite suddenly.
This is a fraction of the information I can convey about things of interest in the realm. Perhaps one of these related items might help inform you.