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Deepstone is a deep black aquatic material that is mined from the bottom of the Endless Sea in the world of Ninjago. The molecules that Deepstone consists of are constantly moving, yet still staying solid; making it an effective material for utilization in both combat and defense against ghosts. One of its uses are to forge Aeroblades, a shuriken-like weapon that is highly effective against ghosts. It was also forged into armor, along with vehicles, for the Ninja to aid them in their fight against The Preeminent.