League of the Western Fall
The amulet found on the body of Balgram.
Harner Goss called it Vade Mecium and it controls the portals that allow access to Locus Paths.
The amulet has two sides, each inscribed with a pattern. These patterns match the portal platform.
When the amulet is placed on the pedestal, who/what ever occupies the platform is teleported to another platform determined by the pattern on the opposite side of the amulet.
There seem to be many portals and therefore many amulets, each unlocking the path from one specific portal to another.