The Osmo River (pronounced OSS-moh) is a major river in western Talmithe. It begins in the Fangs of Khurazar south of Xatabra then flows largely south into the Mhasmuth Ocean. Several major settlements of Great House Velparun, and many smaller, are located along the river - it is generally considered to mark the westernmost extent of Velparun territory, though in reality the tribe takes tribute from multiple subject tribes living of the river in lands but east of the flooded grasslands of the Flower Kingdoms.