In The Mind's Eye, you must enter the Mosh'Ogg Ogre Mound and defeat Mai'Zoth to obtain the gem known as the [Mind's Eye]. Once this is complete, you can finally attempt to save Yenniku, the Darkspear chief's son. This quest is part of a long chain, all available in Grom'gol, the first being Hunt for Yenniku which can be obtained from Nimboya at the north exit to the camp.