According to Ironborn legend, Nagga was the first sea dragon, and was capable of feats such as feeding on krakens and leviathans, and drowning islands when angry. The Grey King, helped by the Drowned God, managed to slay her on the shores of the island of Old Wyk. He built his hall out of her bones, and her jaws became his throne, and her teeth his crown. He warmed his hall with her living fire. However, when the Grey King died, the Storm God drowned the fire and the throne returned to the sea. Only her bones that made the pillars and beams remained.