Suspendium

Buoyant ore (부유석, Buyuseok; or "Suspendium") is a miraculous mineral. The higher the purity of Suspendium, the better it floats in areas of high Shinsoo density/viscosity. Pockets, Inventories and Lighthouses are all made from suspendium(Ch 40).

Light Bearers must manipulate Shinsoo, so their Lighthouse can float, as a Lighthouse is made from minimal purity of Suspendium.