The Guerilla Union of South Stream Shrews of Mossflower, or Guosssom, is a southern offshoot of the original Guosim, and possibly a descendant of the Northwest Shrew Tribe. This faction is characterized by the importance of the Blackstone, a mark of rank held by the Log-a-Log. They populate mainly the Great South Stream, and sometimes go into the Great Inland Lake. They try to avoid this when at all possible however, due to fear of the Deepcoiler and the White Ghost.