| Category | Rivers |
| Location | Limbo |
The Primal Passage is an endless river that cuts through a region of Limbo. It continually changes course, connecting different realms and places of Limbo. It is easy to get lost on this river, as numerous tributaries, and the changing flow pattern of the river confuse even master navigators. The only area of this river that keeps a defined course is the tributary that starts at the Sink of Chaos.