The Byzkus cuts through the heart of the Wilds, flowing south from somewhere near the Royon scrublands. It's the largest of the three—wide enough for canoes, fast enough to be dangerous, and long enough that no one knows its full course. Dwelyn hunters sometimes follow it inland. Most turn back before they learn what lives in the deeper stretches.
Since Surrey Mahaila's sickness began, the few hunters who venture along the Byzkus report strange things. Waters that glow wrong colors at night. Game that moves against the current. The sense that something is watching from just beneath the surface. Whether the river is connected to the Faesong poisoning, or merely reflects it, no one has stayed long enough to find out.