The ambient Investiture of Roshar, carried by the highstorms that regularly sweep across the continent. Stormlight infuses gemstones, which are used as currency and light sources. Knights Radiant can breathe in Stormlight to fuel their Surgebinding abilities, gaining enhanced strength, healing, and access to their specific Surges. Stormlight glows faintly from the skin of those holding it and is gradually consumed through use or leakage.