Teganze is an uberlevel accessible from the Torajan Jungles in Act 3. It is a vast jungle populated by various types of Umbaru Spirits, and is notable for being the only source of Runestones and Elemental Essences, which are components to craft elemental runes, on Destruction difficulty.
The Unformed Land, or Mbwiru Eikura, is the spirit realm that only the Umbaru Witch Doctors can see, through rituals. According to their beliefs, the mortal realm is only a veiled reality of the Unformed Land. They have ritual tribal wars in which they take human sacrifices, only the ones fallen in battle, to be worthy of sacrifice to the gods. The sacrifices are centered upon the life force that flows from the gods that inhabit the Unformed Land to the lesser physical realm that the mortals inhabit.