The River Sphinx is the largest river in Osirion, flowing north from its twin sources, the Crook and the Asp, to the Inner Sea. The majority of the nation's population lives along its banks, relying on the river for drinking water, transit, and silt from seasonal flooding for agriculture. Papyrus reeds and white lotus blossoms grow grow from its waters, and hetkoshu, a type of Osirian crocodile, lurk in its depths. Hippopatami are occasionally found, but they have been hunted to near-extinction.