Pulon - artifact

Pulons are giant arches formed centuries ago by the geomancers. These arches are magical gateways at the edge of each of the Islands that magically transport all who pass through them to a twin on Pulon Island, which has seventeen working pulons, though this number was originally nineteen. Pulons stand taller than any building save the Hall. Throngs of people can travel through at any given time, but transport is in only one direction at a time. When a pulon is inactive, anyone who steps through steps into the Void.