the matoran are re-purposed, hahli works with karzahni. as the chronicler, she educates him in the events of the past hundred centuries. the other matoran are put to work in the furnaces, where they meet an av-matoran who resided there before the light-barrier archway was constructed. with his mind broken, he rambles about his previous identity, working in a "world that feeds the world" where he constructed the toa canisters. he reveals a set where hidden in karzahni, and despite his warnings that matoran would not survive the journey, they journey underground to them. karzahni tries to stop them, but when matoro goads him, he gives a vision of the death of the great spirit and its effects. the vision is so appalling that the tyrant hesitates, and jaller's team escape for voya nui.