Items found in the Loric Chests of Number Nine and Number Four and most likely in the others. Sustenance is the name given to them by Nine, they are cubic shaped stones that gives the user food or water when it is placed in their mouth. Nine's sustenance cube is yellow and gives food, while Four's is blue and gives ice cold water. The Garde usually didn't use this item. It is confirmed to have been dumped in the Sanctuary.