Clan of the Seven Stones
From Diablo Wiki
The Clan of the Seven Stones is a rival tribe to the tribe of Diablo III's Witch Doctor (Tribe of the Five Hills). It's a tribe of the umbaru race, located in the Teganze region of the Torajan Jungles.
The human sacrifice culture and war rituals of the Clan of the Seven Stones, is similar to that of all umbaru tribes.
Other Known Tribes